Replacement Screws; One Piece Rails; Rings. Mountain Tech. $149. 0. Includes mounting screws and wrench. Leupold recommends that 6-48 screws in a ring or base be tightened to 18 inch-pounds and 8-40 screws be tightened to 28 inch-pounds. 49. Quick Disconnect Ring Compatible: No. 00 + Wishlist + Compare. Tighten the base screws down using a torque wrench, the 6-48 screws to about 22 in. $102. . Your mounting system is the crucial link between your firearm and your optic. Mounts; Tools . Maxima Steel Bases are precision CNC machined from solid steel and are held to very tight tolerances. The Weaver Multi-Slot Rifle Scope Mounting Base for Savage Axis 48347 provide your gun with an incredibly versatile edge. Method 1: Measure the Screws. Pre-Owned. 00. THE TALLEY GUARANTEETC Encore Pro Hunter Weaver Scope Base Black. 22 for a package of 12. Many / Most bolt action rifles, Remington, Winchester, Savage typically use 6x48 screws to attach a scope base to there rifles. For more information about 20MOA please read 20 MOA Explained. Only came with 8-40 screws when my Bergara b14 HMR needed the 6-48 set. That is why Weaver has picked this time to update their scope base offerings to include new multi-slot bases for the Axis rifle. One Piece Scope Mount w/ Integrated Rings; One Piece Scope Mount; Two Piece Scope Mount. The size of them is 8-40 and will use a. Warne 1” Matte PA Rings: Best Rings For Heavy Recoil. Leupold Rifleman: Best for the Money. SCOPE RING RING SIZE TORQUE (In-Lb) BADGER ORDNANCE: 30mm, 34mm T15 Torx: 15 - 18 Each: BADGER RING BASE: Keeper Nut 1/2" 65 Each: Seekins. Our quality rings, mounts and bases are vital to getting and staying on target, round after round. 8-40 Base Screws. Black Oxide Slotted Weaver Oval Head Gun & Scope Screws - 10 pcs. Integral recoil lug machined on the bottom of the base extends into the ejection port of the receiver. Jan 11, 2023. Weaver®, an industry leader in high-performance optics and mounting systems for more than 80 years, announces the addition of new multi-slot bases for the Savage Axis rifle. Re: Scope base for Savage 110BA (>0 MOA) i called EGW and ordered a 30 moa base and had them open up the holes for the 8-40 screws. New Zealand. Shop Weaver Savage 110 8-40 Rifle Scope Base | Be The First To Review Weaver Savage 110 8-40 Rifle Scope Base + Free Shipping over $49. only use 10 in-lbs on those (4) screws. Was: $19. 00 FLat Rate Shipping. $41. Rifle Scopes 8-40 scope base #8-40 screws. Mounting Hardware: #6-48 X 1/4 Screws and T-10 Bit Included. $8. Refill your Leupold factory screw kit or keep these extra-strong, heat-treated screws on hand for your customers and yourself. Ring screws are 6-40 X 5/8″ long. List of common screw patterns. 806 hole spacing and 8-40 screws (“the bigger screws”). Thanks for posting that. Location. Location. Support Store Careers Login FirearmsThe last leupold base I bought (1pc, picatinny base +15MOA) for a rem 700 had both sizes of screws included in the package, 6-48 & 8-40. Jan 30, 2014 135 94 Kissimmee, Florida. 210 New. The 8-40 ring screws get 28 in/lbs. 80334 mounts manufactured after 3/2021 are drilled to accommodate larger diameter screws (#8-40) and now come with #6-48 and #8-40 screws. More from Weaver @ TFB: Leupold Torx Screw Kit 52395. If your rings and bases are not integrated, you will need to mount the bottom half of your scope rings to the scope base. As of 9/28/21, all Axis mounts ordered directly from EGW will come pre-drilled for #8-40 screws. Model: 48521. 8-40: Aluminum Bases - Pairs: 48488: BASE PAIR SAVAGE 110: Aluminum Bases - Pairs: 48492:. “New models for the Savage Axis include a standard 0 MOA multi-slot base with 8-40 screws, a 0 MOA extended multi-slot base with 8-40 screws and a 20 MOA extended multi-slot base with 8-40 screws. Product Details. Place the base(s)/rail on the receiver. The Steel Bed was mixed, and a black dye was added to help it match the scope base. Talley 1-Piece Picatinny Style Scope Base Savage Axis (8-40 Screws) Matte. THUMBNUT 1" PIC ADPT SCOPE: Aluminum Bases - Tactical: 48372: THUMBNUT TACTICAL MOUNTS RISER RAIL: Aluminum Bases - Tactical:. 018 sq in or roughly 30% more material. Ideal for Pierce Actions and Browning A-Bolt models, the M912/912M Savage 10/100 two-piece base features 8-40 screws. ¾' long 6-48 and 8-40, steel screws give you plenty of length to work with when customizing screws to fit custom bases. Pappasniper Sergeant. . 00. But for the very best job and for an eye-opening look at how much torque is correct, a torque wrench is the only answer. 98oz Length: 5. BASE AND RING FIT GUIDE Find the right Leupold mounting system for your scope LEUPOLD. The enhanced length of the Talley Steel Base Extended mounts your Rifle Scope perfectly every time with no shift of position. Ambidextrous: Yes. Hope this helps. 99. 69 Nm), Warne and Nightforce 25 in/lbs or 2. Tighten 6-48 screws to 22 in-lbs and 8-40 screws to 28 in-lbs. 49. Both styles of screws are included with each Mark 4 base. Compare. EGW HD Savage Round Back Short Action Picatinny Rail Scope Mount. Our Warne Mountain Tech 7688-20MOA tactical rail with tapered 8-40 screws from Warne Scope Mounts is designed to attach to your Winchester XPR SA short-action rifle. Richard HiltsThe Leupold Mark 4 Picatinny-Style Scope Base is ideal for use on your long range rifle. Weaver Grand Slam Steel Top Mount Base, Fits Savage 110, 671 (8-40), Black 48261 | Bundle of 2 Each +2 options. Torque Specs: 20 in/lbs. 98 + tax and shipping. 00 - $234. Clear. The major diameter will change very slightly as the thread per inch, (TPI), change. Includes mounting screws and wrench. I try never to use a non-Torx head style as the other configurations are not nearly as secure to the torque wrench as Torx or Torx-plus styles. Weaver #1 Side Mount Base - 48401 $17. Seekins Precision 20 MOA #8-40 Short Action Scope Base Screws Fits Remington 700. 4 Hole to hole spacing dimensions are . Replacement Ring Cap Screws Fits HD Rings and Keystone Rings SKU:49996 From. $5. Footer Start. #8-40 X 1/4" Screws. I take longer screws and file them until each one fits perfectly when under proper torque. If it does not fit at all, it means the screw hole size is 6-48. Other than the Leupold 2 pc 8-40 adaptable bases are there any other Weaver type 2 pc scope bases for Rem 700 LA with 8-40 screws? Ordered list. 00 * * Nightforce 1 piece Winchester 70 long action 20 MOA base A196. As of 9/28/21, all Axis mounts ordered directly from EGW will come pre-drilled for #8-40 screws. (8-40 or 6-48 Screws) $84. 278" - which worked fine for the back three screws (which might be OK until I get a short front screw). 900+ reviews Great reviews. I mounted the bases and used Burris Signature Z rings and by using 20 MOA inserts I got it centered. Works perfect for the larger head on 8-40 torx screws and matches the angle. 99. Torque Specs: 20 in/lbs. Technical InformationNotes: 8-40 tap and correct. 4. 95 posts · Joined 2006. Now I have to make sure the scope rail I buy has the proper 6-48 screws. 2 Hole spacing measured center to center. I ordered these and didn’t have to shorten screws. Unimount; By Diameter. The hunters who take to the field choose their equipment carefully, in order to make the most of their expedition. The un-coated surfaces exposed by the counterbore will be addressed when the rifle. 0 MOA multi-slot base with 8-40 screws, a 0 MOA extended multi-slot base with. 2023 / Shop our Lightweight Alloy Scope Mounts Collection / Call (907). Made from 18-8 stainless steel, they're chemical resistant and may be mildly magnetic. CjC73; May 15, 2020; Replies 0 Views 329. Customer. Sep 8, 2017 132 45. 338 A-Sq to . 66. Price: $9. #6 = ~0. Extra-long shank protects adjustment threads, while an extra-large handle is provided for quick,. Assortment includes all of the most popular screws for mounting bases including slotted Fillister, slotted Weaver Oval Head, and Torx. $5. Location. Bergara New 2018, Premier Short Action, HS Precision Rem 700 Style, Remington 700 Style Short Action, Rem 700 Police Short Action (8-40 screws) Related Products. Bore height dimension is . Brownells sells a kit with oversized 6-48 screw and a tap for problems just like yours. Use a little paste wax on the tip of a toothpick to apply into the threaded areas on the receiver. Thompson Center Encore Pro Hunter Scope Mounts, Sights, and Rifle Scopes. Manufacturer #: 306-25. that in itself has been the source of some problems. BASE PAIR SAVAGE 110, 8-40: Aluminum Bases - Pairs: 48488: BASE PAIR SAVAGE 110: Aluminum Bases - Pairs: 48492: BASE PAIR, MARLIN 336: Aluminum Bases - Pairs: 48493: BASE BROWNING X-BOLT MATTE: Aluminum Bases - Pairs: 48494: BASE PAIR, RUGER 10/22 MATTE(WM) Aluminum Bases - Pairs: 48495: BASE BROWNING X-BOLT SILVER: Aluminum Bases - Pairs Re: ?? on Base Mounting, 8-40 screws really needed? There should be no need for it. 49 $ 25. Magnum a Carl Gustaf 8000 22-250 I own has the base holes misaligned to the point I didn't have enough windage adjustment in my scope. (6-48 Screws OR 8-40 / T-15) Common Screw size is 6-48. Great rail but the 6-48 screws will not work on the Savage 110 Ultralight because it is drilled and tapped for 8-40's. Made in America, these Savage Scope Mounts w/8-40 Screws made by Talley Manufacturing offer a unique and simplified one-piece scope ring and base solution for Savage rifles with round receivers, the AccuTrigger system and 8-40 screws (“the bigger screws”). Quantity Discount Price Purchase Limit . Skip to main content Toggle menu. Stiller Actions: 22-25. Skip to main content. Tactical. 20/Count) FREE delivery Wed, Nov 22 on $35 of items shipped by Amazon. Now mount the rings on the bases. Kit contains everything you need: 12 each of 8-40 x 1⁄4' and 3⁄8' Socket or Torx head screws, #19S and #28S drill bit, a taper tap and a bottom tap, plus one Fillister. Add to Compare. Badger Ordnance Torx Head Scope Ring Screws 8-40 Thread Matte Black Pack of 12. Savage advertises these rifles has having 8-40 (I looked up the exact model). Jan 2, 2021 #3 ; Only PREMIER actions have the. 0. #1. 7mm) Sold in pairs. 2. Weight: Fits: Bergara B-14, BSA Monarch round receiver, Christensen Arms bolt action Rem 700 style, Churchill Highlander, CVA Paramount Muzzleloader, Herters U-9 (drilled and tapped), Howa 1500 & 1700, Mauser Model 18, Mossberg 1500 & 1700, Nosler M48, Raptor Arms. 2 reviews. $10. Clamping the scope base in the mill vise, I located the first hole with a . Torque Specs: 20 in/lbs. Now: $17. 8-40=28in/lbs 1PC Bases; 2PC Bases; Rings; IMS (Integrated Mounting System) Mark 4; Quick Release (QR) 1PC Bases; 2PC Bases; Rings; Ringmounts; Rifleman; Standard (STD) 1PC Bases; 2PC Bases; Rings; Use. Torque Specs: 20 in/lbs. Accept all Weaver cross-lock style rings. Scope Rings/Mount to Base Screw Torque Setting. Always verify that your firearm is UN-LOADED before performing any service on it. Screws that mount the rail to the action/receiver. Unimount; By Diameter. Specifications. Long Range models are 20MOA bases. Equipped with 8-40 screws, it fits Savage SA models with Picatinny or Weaver style rings. Whether you are looking for a tactical scope ring, a modern sporting ring or our traditional scope ring with a Picatinny mounting system, Talley MFG has Pic Rails for all applications and firearms enthusiast. Instructions. Best scope base with #8-40 cap screws? 91Eunozs; Jan 8, 2023; Observation & Sighting Devices ; Replies 6 Views 419. 10 if for some reason 8-40 threads got damaged and needed cleaned up. Supplied with #8-40 screws. Nov 21, 2019. Firearm Manufacturer. Leupold mounts are every bit as rugged and. 153" diameter = 0. 0 out of 5 stars 3. Looked on line and found EGW that makes them on Amazon with the #8-40 screws but it doesn't say it is for the Savage Axis II. I looked through the latest Brownells catalog and found that the screw hole size on most bases aren't listed. Leupold Mark 4 Remington 700 Short Action Scope Mount $61. 82 Nm, Vortex 55 in/lbs or 6. Skip to main content Toggle menu. Mounting Hardware is Included 80300 mounts manufactured after 12/2020 are drilled to accommodate larger diameter screws (#8-40) and now come with #6-48 and #8-40 screws. 3mm); Pilot Dia. The question was "weaver vs fillister heads on scope bases". Can you simply drill out the weaver base to accept the 8-40 screws? Expert Answer. Made in America, these Kimber 84M Scope Mounts made by Talley Manufacturing offer a unique and simplified one-piece scope ring and base solution for Current Production Kimber 84M Rifles with the larger 8-40 screws. I ordered Talley 2pc lightweight rings/bases with the 8-40 screws and they work perfectly. Product Details. I currently have screws in sizes of 5-48, 6-32, 6-40, 6-44, 8-36, 8-40, 10-32 and 10-36. Narrow Knurled-Head Thumb Screws. 4. Win 70 scope bases with # 8-40 screws. I buy the non standard taps, dies, and bulk screws from brownells, a gunsmithing supply house:. If you are on a budget, you'll appreciate the value of Warne's Vapor mounts. 59 inches (40. . Description. Savage Ashbury Scope Base (Screw Size and Thread) By 801-tactical in forum 110-Series Rifles Replies: 2 Last Post: 02-20-2018, 12:49 PM. The Weaver Ring/Burris Ring alt hd screws must have the head diameter reduced to fit the Burris rings. In this case, a scope base with the holes drilled out a little extra was required, because an 8-40 screw doesn't fit through a hole drilled for a 6-48. Choose an option 1/4" 3/4". 00. 0 (0) 0. I'm calling out the screw number difference because typically it's better to have more screws locking the base in place. All lengths listed are nominal shank length. Weaver 63B scope base (modified) $ 20. Mounting Hardware: #6-48 X 1/4 Screws, #8-40 X 1/4" Screws and T-10 Bit Included. Drill first with a small drill about 1/8”, then open up. 00. These bases are compatible with Warne Maxima fixed scope rings and Warne Maxima quick detach scope rings. $120. 338. Description. IMPORTANT: NEVER OVER TIGHTEN ANY BASE OR RING SCREW. 5 models Wheeler Engineering 1-PC Sav 110 Scope Mount As Low As (Save Up to 40%) $59. Fits: Bergara New 2018 Premier Rem 700 Style, HS Precision Rem 700 Style Long Action, Remington700 Police, XCR 338 Lapua (All with 8-40 screws) If you need help finding the right bases for a Savage centerfire rifle, this guide will help you determine what you need to know about your rifle. Leupold Mark 4 AR-15/M16 Handle Mount Weight: 2 oz. Some even come with blue Nylok already applied to them. 860 inches (21. However, there is enough difference in the major diameter between a #6 and a #8 thread to determine the size. A1022M Ruger 10/22 1 Piece Base, 10 MOA, Matte AluminumDescription. Select Items In Stock QUICK ADD. Ambidextrous: Yes. The purpose of the screws is to provide a clamping force thru tension to the base, the base being pulled down against the action creates friction between the two objects, this friction is what holds the base in place, one of the reasons people bed their. For one of them, I finally took it to a retired automotive engineer who has a garage metalworking shop, and he redrilled all 4 holes and tapped them for 8-40 screws. A TORX head lets you set a screw down tight without the bit slipping and damaging the screw slot. Pinning gives a lot more stability with less work too. You get a full selection - 168 Socket Head Screws: 1 dozen each of 14 different screws includes 8 Fillister Head and 6 Weaver Oval Head styles in 4 lengths and 3 thread sizes (6-40, 6-48 and 8-40). Please note, this only applies to mounts directly purchased from EGW. 89mm) Rear hole spacing: . Clearly states at the bottom for description this base is for the premier series (pro) Bergara. -lbs. Leupold TORX Screws for BASES - 6-48 x . Add to Cart. 338 A-Sq to . 00 $ 115. Jun 23, 2021 2 4 Mississippi. This Rifle Scope Mount from Weaver is constructed of tough, lightweight aluminum that can. Scope mounts are used to attach telescopic. Long version: All base mounting screws need to be tightened "enough". Scope Mounting / Alignment, Leveling & Other Tools; Forster Plug Screws 8-40 x 1/8" Blue 10PK; Forster Plug Screws 8-40 x 1/8" Blue 10PK Shop All Featured Ammunition Featured Reloading Supplies Featured Gun Parts. Posted By: windridge Re: Big heavy scopes,. Savage New 110 Long Action (8-40 screws) & HS Precision Savage Style Long Action (8-40 Screws) Related Products. ZCO 5-27 vs 8-40. 860 inches (21. A Vapor scope base from Warne Scope Mounts offers outstanding performance at an economical price. (A sight "mount" is correct terminology, but note - in that case - it is not a scope mount. Base is machined for the required 8-40 screws as well. 2mm); 45° Shoulder. Any ideas as all I can seem to find is a 40 moa base from EGW. Torque Specs: 20 in/lbs. 1 dozen S/S, 6-48 plug screws; 1 dozen S/S, 6-48 positive stop,Kwik-Site muzzle loader W/8-40 screws round recievers T/C KSC-3033 M scope mount. Rifleman Savage 10/110 Round Rear Rcvr (8-40) Matte . Dec 18, 2021. 295 New. longtooth. It is my opinion that all screws associated with scope mounting should be thoroughly degreased and a small drop of blue Loctite be applied to help keep them in place. The screws are T15 his keys. 6oz. jb0311. PACHMYER FORSTER GUN SMITH FILLISTER HEAD 6-48 SLOT SCREWS Brand New. If you’re pressed on time, here’s a quick list of the best scope rings: Aero Precision: Best Scope Mount for AR-15. 190". Rifle Scopes. (8-40 screws), Matte $34. Specifications. A Vapor scope base from Warne Scope Mounts offers outstanding performance at an economical price. Oct 17, 2017. Bergara Premier Picatinny Base (8-40 screws) (Made in USA) (2018 Production till present time)This item: Seekins Precision 20 MOA #8-40 Long Action Scope Base Screws Fits Remington 700 . Ive used them many times in my Rifle shop over the years. 00. Savage provides a list of models that supposedly come drilled for 8-40 screws, but they go on and call this list “not all-inclusive”. Please note: #6-48 screws and #8-40 screws are availble in torx drive. But not all thread sizes are available in all heights. 7671-20MOA. Mounting Hardware: #6-48 X 1/4" Screws, #8-40 X 1/4" Screws and T-10 Bit Included. T-10 gives you plenty of additional wall thickness where the head joins the shank; T-15 has a. Free shipping on many items | Browse your favorite brands. Free shipping. Had Kirby drill/tap the receiver for #8 - I'll never use #6 again. Savage Axis Rifles with serial numbers higher than N936371 are drilled and tapped for #8-40 screws. Base is machined for the required 8-40 screws as well. All mounts will come with #6-48 and #8-40 screws. ALL NEW BOLT ACTION SAVAGE AXIS RIFLES ARE NOW FACTORY DRILLED AND. The reason for this is there is usually only 3-5 short screws attaching the base to the rifle unlike the rings that have longer screws and tension pulling from the other side gripping the scope. Meridian, ID 83646 Call us at 800-553-8527LEUPOLD 30mm / base screws 6-48 22 LEUPOLD 30mm / base screws 8-40 28 Burris Scope Ring Torque SCOPE RING RING SIZE TORQUE (In-Lb) Eliminator 34mm / base screws 6-48 60 Rimfire & Airgun 34mm / base screws 8-40 20 Singature / Zee Base 30mm & 1" 30 Tikka T3 30mm & 1" 30 XTR Signature Rings 30mm, 34mm &. One source said he contacted Remington and one individual there didn’t know, and one said yes all police versions are 08-40 now. Bases feature black zinc coated hardware for “Element Proof” protection. If your ordering direct from EGW, should be a note toward the bottom stating the 338 that needs 8-40. 00. This feature allows the recoil control keys of Warne Rings to attain maximum bearing surface. 0 out of 5 stars. Check out this huge assortment of gunsmithing screws and find the exact ones for your needs. Talley makes a one-piece base and a 20 MOA rail. 0 out of 5 stars 1. Apr 28, 2005. Screws that attach the rings or mount to the rail on the action. the second number is the number of threads per inch. 79. (I mistakenly posted this in the optics subforum of the Marketplace section. I indicate the bore straight in the X axis and then position to center. This gives your scope attachment platform more strength to withstand the pressure from the heavier LR scopes that are very popular today. 8-40 screws. The Badger Ordnance Remington M24 SWS Scope Rail is an exact reproduction of the original one piece US Gov't contract base. Assortment includes all of the most popular screws for mounting bases including slotted Fillister,. The base comes with (4) #8-40 Torx head mounting screws, The base is 7" in length and is ambidextrous. 137. Our Hunter Series and Heavy Duty mounts now all come with #6 and #8 screws. Lightweight aircraft-grade aluminum for strength and weight reduction. 3 31 ratings. Mounting Hardware: #8-40 X 1/4 Screws and T-10 Bit Included. $8. 99 Clearance. Warne recommends that you loosely. Extended multi-slot bases made from 6061 T6 aluminum construction with matte type III hard coated anodize finish. You risk stretching the threads on a 6-48 if you exceed 20. Note these would need the scope base to either be modified or one made to use #8 screws. Talley Modern Sporting Rings: Cap Screws 17-20 in/lb. A 1/8" Hex Key (Source:. Our one-piece bases are machined to. Made from 18-8 stainless steel, they're chemical resistant and may be mildly magnetic. Aug 21, 2022. Mounting Hardware is Included. now a 40 moa base will take awhile so i just got a 30. (similar setups even). These mounts are machined with precision tolerances to offer superior integrity based on the proven cross-slot design. Alternative method: Tighten screws until snug (~3-4 in-lb), then tighten another 1/4 turn. These Bergara scope bases are the perfect base mount for that one-of-a-kind build. This will give you the flexibility to mount your rifle with the common 6-48 screw size, or drill and tap your gun to accept the 8-40 screws. 4 - Leupold Torx Scope Mount (Ring) Screws Silver 8-40 x. Scope Mounts Scope Bases Scope Mounting Tools. Add to cart Quick view Add to compare. Available at a lower price from other sellers that may not offer free Prime shipping. Check out our offer here. SKU: N/A Categories:. Lock those screws in place! Purple Threadlocker (222) is great for use on scope base & ring screws, set screws, calibration screws, meters and gauges. hesp. Little more pressure on hold itself. Round Back (Receiver) Magnum Target (#8 Screws) Model 110 BA/112, Round Back (Receiver) Long Action Model 110, 111, 114, 116, Ultralite. Equipped with 8-40 screws, it fits Savage SA models with Picatinny or Weaver style rings. My '09 vintage 39A came with the scope base and the screws to mount it, but the screws are too small (diameter) for the tappings in the receiver. Available finishes are a natural, satin silver finish (bead blasted), or an incredibly tough black finish called GunKote. Product Details. Length is measured from under the head. Make sure the new screw doesn't bottom out out on the barrel threads. I know a few factory rifles are drilled and tapped for 8-40 base screws and some owners have their rifles upgraded to 8-40's, but the majority of hunters/shooters use the factory 6-48's. ryanihope (348) 100%. 0) $6. NEVER ATTACH A SCOPE IF THE OBJECTIVE TOUCHES THE BARREL OR CAUSES INTERFERENCE WITH THE BOLT, SAFETY OR. Kimber-84L, 84M (8-40 screws) Related Products. The screw holes to our base are the larger 8-40 screw size. Get the best deals on Leupold Screws In Hunting Scope Mounts & Accessories when you shop the largest online selection at eBay. Our Hunter Series and Heavy Duty mounts now all come with #6 and #8 screws. $27. 00. S. Product Details. Winchester Model 70/54,. That is why Weaver has picked this time to update their scope base offerings to include new multi-slot bases for the Axis rifle. GF Montana. My new scope base offers an array of choices - 0,10, or 20 MOA standard (or more as a custom order), stainless steel or titanium, in your choice of black or silver finishes. Bottom Screws 20-25 in/lb. M902/876BB Remington 700, Burnt Bronze $45. Always verify that your firearm is UN-LOADED before performing any service on it. Sep 13, 2019. #8 = ~0. Precision CNC machined from 7075/T6 aluminum for a high strength & lightweight platform. There are 10-40 gun screw and taps too. A number 6 screw is about . $5. Replacement Screws, 6-48. $16900. 8-40 is what a gunsmith uses to fix a stripped hole. To answer your question about a measurement to determine a 6-40 or 8-40. Use these slim thumb screws in tight spaces. 138 in diameter. View Schematics. Weaver Browning A BOLT/Marlin MR7/Win 70 48503 Top Mount Scope Base Aluminum. FWIW, Brownells sells Torx head scope base screws in both 6-48 and 8-40. This two-piece base is compatible with Savage 10/110 rifles with round receiver and has a matte black finish.