Fusion Firearms Pro-Series gunsmithing tap, 6-48 UNS, Plug style profile, this
is a very common thread used on many gun sights, sight base and receivers.
These taps are Premium High Speed Steel, Not the cheap cheesy High carbon taps.
This thread is common on Bomar style sights, front Shotgun and rifle sights and
many bases such a weaver…etc. This is a high grade Premium Professional grade
Gunsmithing part. These are Top Quality Fusion Professional Series Parts; Made
from the best materials and processes available in today's market. This is one
of our most popular hammers. Made in the USA