Thread sizes

[Daveyb]

Rapid Thread Sizes

Early Mk1




Hammer adjuster: 1/2" BSP

Barrel location grub screw: 2BA

Front scope mount: 2BA

Rear scope mount: 2BA

Barrel clamp bolt: 2BA

Valve retaining grub screw: 4BA

Cocking bolt: 1/4" UNF 28tpi

Valve spring cap: 3/8" BSP

Bottle holder: 3/8" BSP

Front trigger guard: 1/4" UNF 28tpi

Rear trigger guard: 2BA

Hammer pip: 2BA


Bolt guard: 2BA

MK2 / New MK1




Hammer adjuster: M20 x 1mm pitch

Barrel location grub screw: M7 x 0.75mm pitch
Front scope mount: 2BA

Rear scope mount: 2BA

Barrel clamp bolt: 2BA

Valve retaining grub screw: M3 (5mm long)

Cocking Bolt: 1/4" UNF 28tpi

Valve spring cap: 3/8" BSP

Bottle holder/regulator body: 3/8" BSP

Bottle external thread: 1/4" BSP

Front trigger guard: 1/4" UNF 28tpi

Rear trigger guard: 2BA / 1/4" UNF 28tpi

Hammer pip: 2BA

Bottom access plug: 1/4" BSP



Bolt guard top screw: M3 (8mm long)
Bolt guard bottom screw: M4 (6mm long)

Other sizes

Silencer thread: 1/2" UNF 20 tpi



Bottle external thread: 1/4" BSP
200cc bottle internal thread: M14 x 1.5mm
 pitch
280cc bottle internal thread: M14 x 1.5mm
 pitch
400/500cc bottle internal thread: M18 x 1.5mm pitch
Probe adjuster screw: 2BA (5/8" long) grub screw
Probe locking grub screw: M3 (5mm long) / 2BA (3/16" long)

[Mickyd]

Some good information there.md

[KCE]

Thank you for the upload much appreciated.

Regards kev.

[Mr Bond]

Very useful. Thanks!

[Daveyb]

No problem lads just wish I had time to tinker