What are 8-40 screws
- Thread starter taseal
- Start date
Re: What are 8-40 screws
Most receivers are 6-48,8-40 is a bump in fastener diameter.
You want 6-48's or "regular".
Most receivers are 6-48,8-40 is a bump in fastener diameter.
You want 6-48's or "regular".
Re: What are 8-40 screws
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Stick Around</div><div class="ubbcode-body">Most receivers are 6-48,8-40 is a bump in fastener diameter.
You want 6-48's or "regular". </div></div>
i too was wondering this. was looking to get a badger base, but it was an 8-40. is it a larger screw?
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Stick Around</div><div class="ubbcode-body">Most receivers are 6-48,8-40 is a bump in fastener diameter.
You want 6-48's or "regular". </div></div>
i too was wondering this. was looking to get a badger base, but it was an 8-40. is it a larger screw?
Re: What are 8-40 screws
For SAE/English sized fasteners, bolts/screws smaller than 1/4" (diameter) are named according to a "number" instead of fractions of an inch. In the common land, the biggest "number" screw is #12, and the smaller the number, the smaller the diameter.
You are asking about a number 8 screw, with 40 threads per inch.
I think most rifles tend to come tapped for a 6-48, which is smaller than 8-40. My Remington 700 in 338LM is an example of a rifle tapped for the larger screws, 8-40. 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.
Hope this helps. LOTS more info out there on the web about fasteners. This wasn't even a "101" class.
For SAE/English sized fasteners, bolts/screws smaller than 1/4" (diameter) are named according to a "number" instead of fractions of an inch. In the common land, the biggest "number" screw is #12, and the smaller the number, the smaller the diameter.
You are asking about a number 8 screw, with 40 threads per inch.
I think most rifles tend to come tapped for a 6-48, which is smaller than 8-40. My Remington 700 in 338LM is an example of a rifle tapped for the larger screws, 8-40. 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.
Hope this helps. LOTS more info out there on the web about fasteners. This wasn't even a "101" class.
Re: What are 8-40 screws
Warne is fair.
It'd be an inordinate scenario,that I'd purposely leave 20MOA of ele on the table.
Hint.
Warne is fair.
It'd be an inordinate scenario,that I'd purposely leave 20MOA of ele on the table.
Hint.
Re: What are 8-40 screws
If you are running a heavier caliber you might consider having a smith retap your receiver for 8-40. As stick stated most rifles are tapped 6-48 and will state if they are otherwise.
Here Larry the guru of all gun bubbas splain's a bit http://youtu.be/LLMFtwS2bpQ
I strongly recommend this be done by a competent smith, you tap into your chamber and you now have a tomato stake.
If you are running a heavier caliber you might consider having a smith retap your receiver for 8-40. As stick stated most rifles are tapped 6-48 and will state if they are otherwise.
Here Larry the guru of all gun bubbas splain's a bit http://youtu.be/LLMFtwS2bpQ
I strongly recommend this be done by a competent smith, you tap into your chamber and you now have a tomato stake.
Re: What are 8-40 screws
For giggles a guy can go 8-40 and a lugged base.
Reality is,it's been a long while since I've failed 6-48's and that was ala the notoriously shitty Leupold S/S fasteners(pre Torx) and aboard my 378Wby.
I'm routinely comfy in 6-48's,but have been known to go overboard.(grin)
For giggles a guy can go 8-40 and a lugged base.
Reality is,it's been a long while since I've failed 6-48's and that was ala the notoriously shitty Leupold S/S fasteners(pre Torx) and aboard my 378Wby.
I'm routinely comfy in 6-48's,but have been known to go overboard.(grin)
Re: What are 8-40 screws
I had to go 10-40 because the gunsmith I used to change to 8-40 is a knucklehead He f-ed up the original screw holes. So pissed at that guy!
I had to go 10-40 because the gunsmith I used to change to 8-40 is a knucklehead He f-ed up the original screw holes. So pissed at that guy!
Re: What are 8-40 screws
6s to 10s... wow that's a huge jump in size.
6s are more than enough for 99% of the guns on the market with a quality bolt. Unless you're hunting elephants 6s will be fine on most guns.
6s to 10s... wow that's a huge jump in size.
6s are more than enough for 99% of the guns on the market with a quality bolt. Unless you're hunting elephants 6s will be fine on most guns.
MY PROBLEM is not 9 years old, it is TODAY!!
Is it tapped for 8-40 from the factory?
Call Savage, they’ve always helped me with my 22’s
Premier Supplier of Firearms, Reloading Supplies, Gunsmithing Tools, Gun Parts and Accessories | Brownells
Brownells is a leading supplier of firearms, reloading & gunsmithing products, gun parts, and ammunition. Since 1939, Brownells has been committed to gunsmiths, shooters, police, and hunters.
www.brownells.com
Fastenal, your local Ace hardware, Brownells, any of the manufacturers of scope bases.
Put up a WTB ad on the Hide.
Maybe the internet?
They aren't hard to find.
Edited to add:
Look right above, ^^^^ up there^^^^.
Links provided for you so you don't have to put any effort whatsoever into getting stuff for yourself.
