Tap for scope base screws Oct 4, 2022 · Put the rifle back together and then mount your scope on the rifle. Jul 9, 2015 · You can practice with the #10 taps, then work down to the smaller tap sizes. double tap to read full content. The screw will grab and start to tighten, but will not torque to 14in lbs, it will start to spin. 6 posters. Williams Scope Mount Drill Fixture Great tool and it found center for me perfectly. For a #6-48 screw, a #32 tap drill is the appropriate size. Good luck. Set includes 4 sizes of screw, 8 pieces of each size. Froneck. 00 Dec 14, 2004 · I made up a drill jig, looked like an oversize one piece scope base, with drill bushings at the right places to guide the drills. For these tap sizes, you'll typically want to use a drill bit that matches the size of the tap. The 6-48 Taps are high speed steel that are resistant to breakage. This can be a good choice if you're unsure about your rifle's screw size or if you plan to use the scope base on different rifles with different screw sizes. The Hole most drill to tap for the 6x48 is a . Set includes 3 sizes of screw, 10 pieces of each size. 8-40 x 3/8 in, TORX cap Ozzistraightshooter Tap and Drill 4 piece set for 6-48 rifle scope mountings This set includes a SOLID CARBIDE drill bit for drilling hard steel. Starting, Intermediate and bottoming tap are included suitable for starting threads and also good for short blind holes. If you’re using larger screws, you’ll need a bigger bit. Brownells makes a slightly larger bottom tap/screw kit, has anyone ever Sep 8, 2024 · To ensure the screws are just right, it is important to use the correct tap drill size. May 24, 2024 · Learn how to drill and tap your rifle for perfect scope mounts! This comprehensive guide covers everything from understanding different mounts to a detailed step-by-step process. When drilling a barreled reciever, the front hole is drilled to a depth of . However, it is important to use the correct screw size to ensure a secure fit and maintain the accuracy of the rifle. Most scope base holes for . Seekins, etc. What is the thread pitch of Remington 700 base screws? The thread pitch for Remington 700 base screws can vary depending on the manufacturer, but a common thread pitch is 6-48. 7mm, 5. Ozzistraightshooter Tap and Drill 4 piece set for 8-40 rifle scope mountings This set includes a SOLID CARBIDE drill bit for drilling hard steel. I am looking for a scope base and 30mm rings also. Sep 15, 2024 · The standard screw size for the Remington 700 scope base is #6-48, but some people prefer to use the larger and stronger #8-40 screws. The drills and taps in these starter kits were specifically chosen for mounting fiber optic sights on shotgun ribs and mounting scope bases on rifles, shotguns, and handguns. If I can’t verify I guess I can try to measure the screws. Thanks, Joe. I have a new Tikka T3x rifle in 6. CARBIDE Drill, HSS TAP. Apr 19, 2014 · Same here, Jim. This is measuring the factory supplied screws for the scope mount. Unlock precise accuracy with these essential techniques. Comes with drill bushings to keep alignment of drill bit and tap Jul 19, 2007 · The 6-48 is a NS thread (National Special) You may have some luck at pawn shops that sell guns, they usually have a box of them around to replace missing screws and mount scopes on guns they sell, also some bases take a screw that is flat where it goes from the screw to the head and some bases take one that is tapered. Important Note - Make sure you do not apply an excessive amount of thread locker onto the scope base Aug 2, 2013 · The scope base mounting screws on a safari rifle should be designed to withstand the added shock and recoil of a magnum cartridge. 32 screws in the set. 146"-48xЅ" (12. Types of Rifle Scope Mounts. Jan 5, 2024 · The most common tap size for scope mounts is 8-40 or 6-48, with 8-40 being the more popular choice. Replacement Sight Screws (14) Scope Alignment Rods (10) Scope Base Conversion Kits (1) Scope Reticle Levelers (8) Scope Ring Wrenches (3) Scope Shims (5) Sight Adjusting Tools (7) Sight Insert Kits (8) Sight Movers (17) Sight Screw Head Counterbores (5) Small Hardware (52) Bulk Spring Kits (16) Detent Balls (2) E-Clips (2) Gunsmith Coil Springs Nov 2, 2021 · This is a better way to go. 30 screws in the set. First, you’ll need to choose the right size drill bit. 8-40 Drill & Tap, 4 piece set for rifle scope mounting. Dec 3, 2017 · Decided to remove the scope base to add a dab of loctite to the screws. Here’s a quick rundown on how to do it. 22 round will cause the scope base to come loose being mounted with three screws. Jun 30, 2010 · Many / Most bolt action rifles, Remington, Winchester, Savage typically use 6x48 screws to attach a scope base to there rifles. They barely start into the receiver, then won't turn anymore. Not a big deal unless no experience with drills. Also, measuring the screw, it is 0. Apr 26, 2011 · Using this High Speed Tap and Drill Set you can drill a pilot hole and tap the pilot hole giving you a finished hole for mounting screws required by your scope mount or open sight configuration. Adjust the drill press table where the grip frame is hanging over the side when the drill bit is aligned with the scope base holes. 130", the other three are through holes. Ozzistraightshooter 8-40 SCREW SET for rifle scope mountings. But a # 10 screw is a little big for mounting a scope base. 9 grade steel. 146-inch gauge pin and zeroed the readout. 2, 9. 00 and finally 13. 5 x . standard is 6-48 starting with a #31 drill bit. All of the holes are drilled and tapped prior to the barrel being installed and are all through holes. Ozzistraightshooter 6-48 SCREW SET for rifle scope mountings. Aug 9, 2009 · I'm putting a scope base on a arisaka. 7mm) slotted machine screws, blued finish. May 9, 2019 · Based on my experiment I would say the gun would still be safe to shoot if you drilled into the chamber (with a . 5 Creedmoor and I'm having trouble mounting the base to the rifle. The Ruger 10/22 scope base screw thread size is 6-48. Feb 6, 2008 · Use a fitted screw driver and you won't have problems. Aug 2, 2022 · You would probably have to enlarge the holes and countersinks on the rail/mounts if you use the larger screws. If this is your first visit, be sure to check out the FAQ. A number 6 screw is about . Click Here for taps. May 1, 2020 · Please note that if you are using a high risk VPN to register, your profile may be placed in a banned status. If you are mounting a scope to your rifle by yourself, it is preferred to match the scope with the mount. Aug 29, 2024 · Post-2003 rifles use 6-48 screws. Jul 19, 2023 · Tapping drilled holes for a scope base +2. If the looks of a missing screw from the base bothers you, you can just glue a screw in that hole and no one will ever know it. I have now given up on the fixture, and do it manually with vertical mill. There was only 3 threads of engagement. However, as I got started it was apparent that this was a much larger task than simply mounting a scope. This specific screw size is commonly used in scope base screws, which secure the scope base to the rifle. Follow this guide to learn how to drill and tap a rifle for scope mounts. The 'old' size is 6-48 and the 'new' size is 8-40. I'm planning to put together a Remington 700 rifle in 6. This should be done with the good scope mount in place if it's a two piece and if a one piece, secure the rear screws. Page 1 of 1. It's also chewing up some spare screws I had for another 336 Weaver base. Jul 6, 2016 · Two out of the 4 scope base holes on the top of my Ruger 10/22 are stripped. Tapping drilled holes for a scope Oct 29, 2010 · In 2011 I drilled and tapped 10-32 screws into a Mosin Nagant to mount a scope base. Take half a turn, back all the way out and clean out the swarf or it will jam the tap. 5 metric screws. I worked on the calculations of how much torque. Apr 9, 2020 · I think that, if you do that, the scope mount would have to be altered to accept the new size (holes enlarged & countersunk for the screw heads), screws with a proper head pattern (not thread size) found, and any future re-sale endangered because, if the buyer didn't want a scope, there are AFAIK no 1/4-28 plug screws available. I'd suggest practicing on some thin mild steel, copper or aluminum before you do the gun. Jan 31, 2016 · I used an oversize 6X48 tap and screw for a Win 94AE scope base hole. Sep 19, 2013 · Our scope base was designed for the original 6-48 screws so the screw clearance holes need to be opened up for the larger 8-40 screws and the counterbores for the screw heads will need to be enlarged. Dec 25, 2009 · Re: base screw problem The standard machine screws are 6-32, 6-40, 8-32, and 8-36. Noticed one of them came out like this; as if the hole it was initially in wasn't threaded very well. I have a DNZ Game Reaper mount and the screws for the mount won't work. You can get the drills and taps from www. DON'T try going all the way in one pass or you'll break the tap. Sep 16, 2024 · Ruger 10/22 scope base screw thread size is 6-48. Check out this thread for tips on tapping. . Screws measure about . Bullseye-L Forum :: Equipment Discussion. 138 in diameter. I don't want to force them. project to replace all 4. But for fastening scope mounts to receivers, we use 6-48 or 8-40, which are non standard. Quality control. com in kit form. We handpicked high quality taps, and paired them up with the proper drill bits, then packed them in a durable polyethylene case for easy access and storage in the shop. SPECS. 146"-48 and install. The following are the types of mounts: Picatinny Mounts May 4, 2022 · I just purchased a new B14R today. Clamping the scope base in the mill vise, I located the first hole with a . I can borrow a small size tap and die set that goes down to 8-40 size. 4mm, thread length 12. Jan 31, 2016 · The original thread is 6x48 but if the cross thread damaged it all the way to the bottom just running a tap into the hole probably will not restore it. Purchased the base complete with screws, dunno what tap and drill to buy. If you go as big as 10-32 you will likely have to turn the heads down on the screws and use a special counterbore or a small end mill to counterbore the scope bases. New gun, looks like the tapping head didn't reverse and pulled all the threads when it was removed. Mar 17, 2025 · Check that the screw holes on the base align with the holes in the receiver. Yes, it is possible to sink lower than B-Square. midwayusa. Buy a #8x40 tap and some 8x40 screws (I'd do all four). Next, mark the spot where you want to drill the hole. I am lucky, even though I have several screw sets for doing gunsmith work, I found that a local ACE Hardware store by my job stocks and sells some common screws in Gunsmith thread like the 6/48 , 3/56, and 8/40. The set can drill and tap hard receivers and you can produce a Oct 26, 2011 · 1) Which Weaver bases fit the 513T? 2) What is the screw size and thread for the Weaver mounting screws? I have never drilled and tapped a receiver before - but I am a reasonable capable do it yourselfer with many years experience fixing and modifying stuff. Screws included are: 6-48 x 1/4 in, TORX semi countersunk head. Post-2003 rifles use 6-48 screws, while rifles manufactured before 2003 use 3. I want the ability to use my iron sights by using QD rings on the scope, and I have modified a factory mount by milling a line-of-sight channel down the middle of it. Skip to. Most scope mount screws are harder than the barrel steel so when a screw is run in crooked it is the female thread which suffers the most damage. 30mm, thread length 3. The part you need is the receiver, possibly the barrel too depending on which type of scope mount you’re going for. Tapping an existing hole in an aluminum 10/22 receiver is very easy and cheap. 5mm (approx. When the rifle arrived there were plug screws in the scope mount screw holes. 51 (P/N 395-840-001) . T10, overall length 6. Y. It was already drilled and tapped for a scope mount and appeared to just be missing the cap nipple. Unfortunately I'm not aware of any ready-made product for this, so you'd need a machinist or gunsmith to fabricate and install the Oct 4, 2020 · The gun was already drilled for the 'correct' mounts, and I see some extra holes for something else that must have been tried. They are sending me a tap and an extra set of screws. Scope threads into aluminum receivers should have steel inserts put in first (Browning does this on their auto rifles that have aluminum receivers), esp if you are using anything other than a very lightweight optic like a reflex sight. 1360", so I believe that would make it 8-48. 6-48 x 8. 89mm 6-48 SCREW SET, for attaching scope mounts to receiver, 12. com : Seekins Precision 20 MOA #8-40 Short Action Scope Base Screws Fits Remington 700 : Sports & Outdoors. I'm thinking of a D. brownells. Mar 16, 2015 · Amazon. Sep 6, 2008 · The larger screws are way stronger and are the same size used with most scope rings. T15, overall length 15. Is it necessary to upgrade the scope base mounting screws to 8-40 for a heavy scope like this? I'm Feb 19, 2012 · One source said he contacted Remington and one individual there didn’t know, and one said yes all police versions are 08-40 now. The set can drill and tap hard receivers and you can produce a strong and well finished thread. 4mm. I called EGW and they said I may need to run a tap in the holes to clean them out. High quality hardened steel black oxide screws to retain your scope mounts on the rifles receiver. 120 diameter bit or smaller) but if I was planning on using it for more than a few shots with the holes drilled through I would install my scope mount and then mix up some JB Weld and reach up into the chamber with a little JB Weld Mar 23, 2012 · Remove the rear sight and the cylinder. Screws included are: 8-40 x 1/2 in, TORX cap head. Leupold offers the Mark 4 base, which conveniently comes with both #6-48 and #8-40 screws. May 16, 2012 · Then assemble the scope base on the action, inserting the "gooped up" screws. View attachment 329894 This website was a big help in calculating the torque, especially the guy from Caterpillar. 160" across the threads. I ordered an EGW 20 moa scope base which also came today. Apr 3, 2023 · That usually means drilling and tapping the gun for screws. We can't help w/o knowing what screw size came with the scope base. Basically there are now two different sizes of screws to mount scopes on receivers. 2mm. 6x48 is a special thread not the normal 6-32 or 6-40 pitch. They also sell the screws for $5. 22 for a package of 12 (P/N 080 Torx-Style 6 Lobe Ring and Base Screw Kit ; Contains 10 each of 20 premium 6L-10and 6L-15 style scope ring and base screws ; Packaged in a handy storage box with individual compartments for each size screw › Jun 22, 2010 · You can retap that hole to 8-40 threads or I would just mount the base with the remaining three holes. The 8-40 Taps are high speed steel that are resistant to breakage. Thanks to Doug Knowt for his tip. 31 High Speed Steel Drill - Set in envelope About Williams Williams Gun Sight Company was started in 1926 by Harvey Feb 6, 2008 · The Weaver mounts use the 6/48 screws. This makes take down a bit of a chore and would probably require sighting in after words, it does provide a rock solid mounting without extreme tightening of the magazine tube nut. Ed Hall. Tapped thread depth/strength question Badger Ordnance Torx Head Scope Ring Screws 6-48 Thread Matte Black 12PK Oct 10, 2020 · Re- drill and tap to 8/40, measure the screw length as well as the depth of the hole, I hold the screw with a pair of padded vice grips and grind the screw down to correct depth. By modifying the mounting Jun 28, 2007 · Well on my 870 Tactical Magnum factory pre-drilled green machine, starting from the barrel end of the receiver the holes go 1. 5 Creedmoor for possible PRS shooting I'll be using a fairly large scope Something with a 34mm tube and a 56mm objective lens. Brownell's sells the 8x40 tap for $2. For most #8 or #10 screws, a 1/16″ bit will work fine. Note: If you want to know How to Clean a Rifle Scope Lens click HERE. OVERSIZE SCREW SHOP KIT Slightly larger in diameter than the common 6-48 scope base mounting screw. Get a careful scribe on the centerline of the barrel (the big, wide flats will be a great help here), centerpunch the holes and be very careful to level the barrel in the vice. It's not like the "recoil" of the . No need to redrill base or gun. If you own a Tikka T3 rifle and are looking to mount a scope, it is important to know which screws are compatible with your rifle. But I am not making that claim for sure. ), head diameter 5. I have drilled and tapped ~100 military rifles, including Arisakas. Feb 17, 2024 · Typically, the screws used for Remington 700 bases are Allen (hex) screws or Torx screws, depending on the specific base and rings being used. It will have to be disassembled. This is a relatively uncommon screw size, and some users have reported difficulty in finding replacement screws in this size. Mar 14, 2021 · Initially, this seemed to be a pretty straight forward job. You can find both sizes at a Tru Value hardware store. Mount the scope base using the existing screw hole for the rear sight and tighten the screw down with the base perfectly centered on the top strap. The Rifle In Question – Without question, you will need the rifle. Oct 29, 2010 · The scope base screws are tapped into both the receiver and the barrel extension and essentially make the barrel fixed to the receiver. The EGW REVEL scope base is designed specifically for the Savage REVEL, so it should be a perfect fit! Apply a small amount of thread locker onto the scope base screws. 120 diameter hole. The set can drill and tap hard receivers and you can produce a Nov 24, 2020 · What size screws came with the base? Usually there is a chart that for such-and-such a screw, you drill with a #xx drill-bit and then tap for that certain screw. I tried mounting the base but couldn’t get the screws to Justmentsrun in. Any help will be appreciated. The set can drill and tap hard receivers and you can produce a Sep 21, 2024 · Scope Base Options: When choosing a scope base for your Remington 700 Police rifle, you have options. Oct 3, 2010 · The scope mount holes on the Marlin 336 are drilled and tapped for 8-40 screws. Anyways I just want to make sure I order the correct scope base with the correct screw size. - 6-48 High Speed Tap - No. I. 22 caliber pistols are strong enough at #6-48 size. Jan 3, 2019 · Good morning. The #8-40 screws require drilling and re-tapping the holes, and they are more commonly used when mounting Hubble clones. The required screws differ depending on the year of manufacture of your rifle. com or www. I'm in the process of setting up my optic & mount for my 10/22 Takedown, which will arrive here this week. Is this something I can do myself, with a cordless drill on a workbench with a vice? I don't Nov 22, 2013 · My tap and die set, including the measurement gages only go down to -40 and it doesn't fit, so I would say it is -48. This means that the threads per inch (TPI) are either 8 or 6, and the diameter of the screw is 40 or 48. Most holes "ruined" while drilling or tapping can be fixed; just retap to . for the head to fit in the base I leave the base alone I load the screw in a hand drill and turn it on turn on against the grinder, place the screw head to it Mar 22, 2008 · I plan to put a Weaver base on an old 32 cal CVA Squirrel Rifle to mount a long eye relief scope (Old Timers Disease). Feb 16, 2017 · So I picked up a rem 700 short action a while ago and just noticed the front scope base screw hole is partially stripped. Stainless receivers can be a bit harder than chrome moly, so I would use a new drill and tap for this project. Dec 9, 2019 · You will need: #31 carbide drill bit, #6-48 quality plug tap, Weaver #62 rail (comes with the #6-48 screws and is actually for a Remington 742/760) and I used a Williams Scope Mount Drill Fixture. Mount the scope on the base and secure to the rifle with some surgical tubing around the scope and action (or inner tube bands, bungee cord, etc). the second number is the number of threads per inch. I've Jun 29, 2010 · Whichever base you choose will obviously determine the hole spacing. Ensure your scope is secure and aligned correctly by following expert tips for drilling, tapping, and fine-tuning your rifle. It's an old 22, not a target rifle, the 'correct' mount with a quality 3/4' scope should let you get everything the rifle is capable of at any distance a 22 is capable of, you're not going to shoot 1000 yard matches with it. cgmi wfpznppa vrajap urajyzog ppjvv eiswv viwdlo nqwm xiwhjdk ghtdt