HK 970173 Thread Cap 40 S&W Fits VP40/USP40 Black Steel

The HK 970173 Thread Cap is the factory OEM thread protector designed for 40 S&W HK pistols fitted with threaded barrels. Precision-machined from black steel, this compact accessory screws onto the muzzle to shield the precision-cut 14.5x1mm left-hand threads of your barrel whenever a compensator or sound suppressor is removed for service, transport, or storage.

Engineered specifically for the HK VP40 and HK USP40 Tactical (and any other USP/VP variant chambered in 40 S&W with a factory threaded barrel), the 970173 thread cap carries HK's original factory part number and is the correct replacement or spare for the protective cap shipped with the original pistol. Installing the cap takes only a moment and keeps debris, moisture, and handling damage off the barrel's thread profile so the next muzzle accessory mounts cleanly and indexes correctly.

Whether you have removed a suppressor for transport, swapped to a different compensator for the range, or simply want a factory-correct spare on hand, the HK 970173 thread cap is a small but essential piece of HK service hardware that protects your investment and keeps your threaded-barrel pistol ready to run.