Metric screws or re-tap for weaver rail for turkish shotgun?

[The_Shmoo]

Trying to fit a weaver 93AT rail to a TI M3 super 90 clone. Rail shipped with 8-40 screws, gun is NOT 8-40. 99% certain it is M4x0.7. Trying to avoid buying another rail. I can't find any M4 socket or machine screws that fit the weaver counterbore. Should I just run an 8-40 tap through it?

 

[Hitzy]

Yep...that's what I would do. Make it something common.

 

[Suther]

Is there enough meat there to change it to 8x40? Thats the only thing I'd be concerned with. If there's enough metal then have at er.

 

[KyleSchenk]

Yep...that's what I would do. Make it something common.

M4 is common. Any decent fastener place should have them, if not be able to have them in a day or two.

Trying to fit a weaver 93AT rail to a TI M3 super 90 clone. Rail shipped with 8-40 screws, gun is NOT 8-40. 99% certain it is M4x0.7. Trying to avoid buying another rail. I can't find any M4 socket or machine screws that fit the weaver counterbore. Should I just run an 8-40 tap through it?

You're showing location in Mississauga. It's worth a shot to go to fastenal and pony up 35 cents for a couple M4 screws before modifying the reciever.

 

[The_Shmoo]

M4 is common. Any decent fastener place should have them, if not be able to have them in a day or two.

You're showing location in Mississauga. It's worth a shot to go to fastenal and pony up 35 cents for a couple M4 screws before modifying the reciever.

Trying to find the same type of screw that ships with the weaver is proving problematic. a regular cap screw will sit proud of the base, a low head cap screw won't fit the counterbore/countersink. Its a slotted oval head.

 

[KyleSchenk]

Trying to find the same type of screw that ships with the weaver is proving problematic. a regular cap screw will sit proud of the base, a low head cap screw won't fit the counterbore/countersink. Its a slotted oval head.

Gotcha. If it's an oval head you're not able to source, why not just use a flat head ? You may have to adjust the countersink on the rail slightly but it saves modifications to the reciever

 

[kamlooky]

Home Depot has a pretty vast assortment of fasteners.

 

[Deathrawt]

Try a hobby shop if there is one nearby
RC cars use metric hardware and there’s a good chance the hobby shop has what you need

 

[riversrest]

Bicycle shops usually carry metric screws in stainless or "rustfree" blued. Bought a set for replacememt CZ base screws. Was $3,- for a set of 4.