Firing pin thread size

[scharfschutzen63]

Does anyone know the thread size of the No4 firing pin and cocking piece?

[browningautorifle]

the thread size of the No4 firing pin and cocking piece

Post number 16 in our threads here...read "Both SMLE and No4 are .250" diameter and have "fine" threads. HOWEVER: SMLE thread is 1/4" x30 TPI "Enfield Special"; No4 is 1/4" x 26."

https://www.milsurps.com/showthread.php?t=53185

[Alan de Enfield]

The No4 Striker is a standard 1/4" BSF thread with 26 tpi

[Surpmil]

In Bubba's world that's an interference fit.

[Bruce_in_Oz]

The thread is just a pert of the story with the striker / cocking piece assembly

The tolerances on the smooth parallel internal and external mating surfaces FORWARD of the threads are,effectively ZERO.

The thread draws the striker into the cocking piece where it is retained by the locking screw.

The parallel surfaces are an interference fit. NEVER fool around with either surface. If you get ANY lateral / radial movement between the striker and the cocking piece, replace one or both if necessary..

This strict alignment and rigidity are ESSENTIAL for correct operation of the trigger system and the manual safety.

Despite the "wise words" in some "aftermarket "manuals" stripping the striker / cocking piece is ABSOLUTELY NOT "routine" user maintenance. A REAL armourer might do it of the if the striker spring force falls below spec or if there is a possibility of internal rust, (battlefield pickups or beach landing training), but not otherwise.

Lee Enfields are NOT "shake and bake" equipment.

[Brian Dick]

To add to Bruce's comments that are spot on, a loose cocking piece/striker assembly can also be soft soldered as a legit, sanctioned repair.