Find great deals on ebay for 648 screws and 648 screws torx. Cva scope mount screws i sort of fell into a cva inline, stag horn. Now since the mount is off im wondering if i chased those threads with a 648 tap and got new screws if things would work right or would i have to go to 8 40 screws. The weaver ringburris ring alt hd screws must have the head diameter reduced to fit the. I am sure this has been covered in various topics but couldnt find every single part and there seems to be a lot of disagreement on the exact settings for different rifle and scope parts. I need to drill and tap a hole for a scope mount, but i am unsure what size to use. Torque settings various riflescope parts the high road. Afaik all remington actions are factory drilled and tapped for 6x48 scope and sight mounting screws. This shopping feature will continue to load items when the enter key is pressed. Brownells phone number is 5156235401, and their address is. Not sure though if you are needing a scope base screw though. I had steve send me his rings and the boogered screws. This is good if you are tapping out 648 threads to get the greater strength of 8 40 screws and dont want to enlarge the head recess a lot.
Should you use thread lock for base and ring screws when mounting a scope on a. The marine corps uses or has used 8 40 scope base screws on the m40a1, m40a3 and m40a5 which is enough reason for me jarhead. This screw carries a recessed internal socket drive to add strength. These are usually the ones that strip out, particularly if the rings and bases are made of some kind of aluminum alloy. I believe it is a fine thread screw, but i have no idea if its standard or metric. Fasteners vacuum connectors metric hoses metric clamps wheel weights. The four 648 screw holes can then be enlarged to also accept 8 40 screws passing through the mount and tapped into the action. Ive read about drilling out the small factory threads, tapping, and replacing with larger screws, but not 8 32. Does anyone know the size of the screw for common scope mounts. A neighbor came over and asked me to mount a scope for him, it has torx head screws.
In order to navigate out of this carousel please use your heading shortcut key to navigate to the next or previous heading. The bases look like they will work just fine but, the screws are too small. Keep a few of these around just in case you lose one or two to make sure you can. Refering back to an older post, i went with the vortex 27. Is it worth converting from 648 to 840 scope base screws. For example, leupold recommends that 648 screws in a ring or base be tightened to 18 in. I needed some right away to mount a scope on my sks. These larger fasteners offer increased strength over the standard 6. I ordered this to cut some threads into my sks to mount a scope. Buy master gunsmith torx head ring and base screw kit factory replacement gun parts, accessories and gunsmithing service on most manufacturers including browning, winchester, fn america, beretta, benelli franchi, stoeger, remington, bushmaster, marlin, sig sauer, hk and many more. I just bought a 700 5r milspec and have bo base and rings. If the threads are stripped in the gun itself then none will be any good to you like rocky 7 said above. May 03, 2010 as many of you probably know, for absolutely no good reason, a lot of older guns and scope mounts were tapped for 648 size screws which you cant find outside of the gunworld.
The talley steel base, 840 screws has been designed to ensure you have an ideal way to install your favorite optics to your primary favorite firearm. This is good if you are tapping out 648 threads to get the greater strength of 840 screws and dont want to enlarge the head recess a. Remington 700 scope mount screws pacific tool and gauge. The side mount i bought for my savage 6a had no screws, and the ones that were filling in the holes on the rifle are. I also increased the base mount screw size from 648 to 840. Whether as a programming experiment or to fulfill a real purpose, if you can think of a simple task, the odds are that you will find an app to fit the need in the app store. Most manufacturers recommend 20something inchpounds for ring screws.
These difficult to find screws are favored for their non slip design. Ive read about drilling out the small factory threads, tapping, and replacing with larger screws, but not 832. I had also ordered a drill bit and screw tap for the 840 screws. Badger ordnance torx head scope ring screws 840 thread matte. I definitely recommend this set to create perfect screw holes for the 840 screws.
Idm ultracompare professional serial key folder evaluate helps assessment of neighborhoodcommunity directories and subdirectories with. Dnz products traditions muzzleloader rifle scope mount. Packaged in a handy storage box with individual compartments for. Im mounting my first scope so is there anything else a person needs to know other than putting it where you want it and tighten it down. Once this is done you will have your extended mount held in place by a total of six 8 40 screws for a very heavy duty mounting. The mount can be held secure with the two 8 40 screws, and the four 648 screws removed. This kit contains a nice assortment of firearm screws. I found the exact size screws for my project in this box. These screws are usa made, t15 torx head drive, spec hardened for mounting applications, these screws are designed with a 45 degree taper under the head to seat into a 45 degree counterbore that we use on our 840 screw hole mounts.
Take the scope mount screws with you to a good hardware store and match up some screws with the same threads. Maxima m671m hs precision short action 8 40 screws machined from solid steel in both standard and 20 moa configurations, warne tactical rails are designed around the milspec picatinny style rail system and provide a strong and true platform for optics mounting. There are coarser screws on some of the less expensive mounts, however. Pachmayr master gunsmith torx style 6 lobe ring and base screw kit contains 10 each of 20 premium 6l10 and 6l15 style scope ring and base screws. Night force bases for savage are made from heattreated, high strength steel, and are machined to have a 20 minutes of angle taper. The seekins precision rail i decided to purchase comes with either 8 40 or 648 screws. Id alter new screws, if i could, and send steves rings back either still boogered or like new. Now since the mount is off im wondering if i chased those threads with a 648 tap and got new screws if things would work right or would i have to go to 840 screws. This kit contains 12 each of 10 most commonly used, but easy to lose, plug screws. I used a small adjustable wrench on the tap for the handle along with a tap guide to ensure i kept things straight. Windage screws on the rear ring of the scope mount should be tightened to 4045 in. A nagging side effect of production grade receivers is the tendency for certain features to be machined slightly out of position.
You may have to trim a screw down, which can be fun holding it without damaging the threads or your fingers. Scope mount screw question gun and game the friendliest. As many of you probably know, for absolutely no good reason, a lot of older guns and scope mounts were tapped for 648 size screws which you cant find outside of the gunworld. I needed to drill and rethread a scope mount on a steel receiver. Iirc, the standard screws for a scope base are 648. The filler screws that are on the receiver before removal were especially tight on the rear. Brownells and midway usa sells them in all different lengths. So, a 440 is a lot smaller than an 840 even though they both have 40 tpi. Brownells leupold screws torx head base screws, blue, 6. The mounting height of the mount from top of barrel to centerline of scope tube is as follows. Brownells can supply hardened screws, or taps for any of these. Whats the torque spec on 648 base screws long range. What is the tpi of the scope base screws for a remington 700 short action. These torx head screws are the sizes most often used with both squared underhead and chamferred types weaver style.
The traditional process is to chase the existing holes with a drill and complete the job by tapping to the 840 thread pitch size. Weve put together the most requested screw sizes in moneysaving 12 paks so its easier to convert existing rings and bases to torx head without having to buy more than you need. I called marlin and they sent me the dummy screws as they call them, except they are too small. M671m hs precision short action tactical rail 840 screws. Nightforce one piece steel base, 20 moa for savage new. Shop nightforce one piece steel base, 20 moa for savage new style up to 12% off 4. That rounded vertical slot above the screw head prevented me from installing 8 40 screws. Talley steel base, 840 screws up to 27% off free shipping. The 8 40 optic base hole upgrade is intended to resolve this issue. Fittings auto bulbs and harnesses electrical shop supplies cotter pins time sert thread. Is it worth converting the trouble to go to 840 base screws to harden the rifle.
You get an economically priced assortment of 240 screws, all made right here in the usa. Crown bolts socket cap screws are ideal for applications that require a well tooled appearance or broader bearing surface. Windage screws on the rear ring of the scope mount should be tightened to 40 45 in. Gunsmithing remington 700 840 scope base conversion october 15, 2014 bill marr 0. They have a hex drive and flat point with machine screw threads. Most good scope mount screws are usually 648s or 840s. Make sure this fits by entering your model number hex head ring and base screw kit contains 10 each of 14 premium 332 hex style scope ring and base screws packaged in a handy storage box with individual compartments for each size screw. I also increased the base mount screw size from 648 to 8 40. Plugs the two holes in the reciever on the lhs where a receiver sight would be mounted. The side mount i bought for my savage 6a had no screws, and the. I would like to thank you for sharing it just as well and would want to share something as well. Lets get one thing straighti wont do this again except on scope rings of my own. Hi, i bought a torque wrench to be able to tighten the screws on my rifle properly. Gunsmithing making the scope base mounting screws nearly.
I couldnt match the threads with a starrett thread gage. By aligning the receiver bore to an axis on the milling center, we are able to correct position errors on the receiver. Pachmayr master gunsmith hex head ring and base screw kit. These larger fasteners offer increased strength over the standard 648 screws found on most factory rifles. By modifying the mounting system to use 840 screws rather than the typical 648, the system can be made stronger and more reliable. Sportsmans guide has your pachmayr master gunsmith 202pc. Quality made and quality finished, these specialsized, blued screws are packed in sets of 4 screws. These screws are an original factory replacements from badger ordnance. Maxima m671m hs precision short action 840 screws machined from solid steel in both standard and 20 moa configurations, warne tactical rails are designed around the milspec picatinny style rail system and provide a strong and true platform for optics mounting. Assortment includes all of the most popular screws for mounting bases including slotted fillister, slotted weaver oval head, and torx. The seekins precision rail i decided to purchase comes with either 840 or 648 screws. The four 648 screw holes can then be enlarged to also accept 840 screws passing through the mount and tapped into the action.
So, his recommendation was badger on badger and 840 screws. Self drilling screw hex head heavy section screw shop. The mount can be held secure with the two 840 screws, and the four 648 screws removed. Nightforce savage onepiece 20 moa bases are designed to give a precision and stable mounting point for your rifle scope. From christmas through new years day, count on it a week in aprilmay around spring break. Reason why you may be having this problem is, i dont think marlin tapped the 336s for scopes until well into the 1980s or. I took the scope off and would like to fill the holes that are left in the receiver. I can not find a darn screw in mi for my picatinny base.
Brownells can supply hardened screws, or taps for any of these sizes. Pachmayr master gunsmith screw kit 202 piece scope ring. Thats right purchases of ultraedit include a key for ultracompare pro at no additional. The 840 optic base hole upgrade is intended to resolve this issue. But for the very best job and for an eyeopening look at how much torque is correct, a torque wrench is the only answer. For most rifles, rings and bases will both use 648 screws.
Aug 21, 2003 a neighbor came over and asked me to mount a scope for him, it has torx head screws. Once this is done you will have your extended mount held in place by a total of six 840 screws for a very heavy duty mounting. Pachmayr master gunsmith firearm screw kit 277 piece. Unfollow 648 screws to stop getting updates on your ebay feed. That rounded vertical slot above the screw head prevented me from installing 840 screws. These fill open mounting screw holes for most scope bases or sight baseramps.
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