Faithfull Screw Pitch Gauge 55, Metric, Amer-nat

The Faithfull FAIPITCHMA Screw Pitch Gauge is a handy gauge which quickly determines the pitch of various screw threads.
The high-quality polished tool steel leaves are clearly marked with size and a locking device at both ends to securely lock the leaves.

Specifications:

Number of Leaves: 55.
US National 60 Degree Threads: 4-42 tpi.
Metric 60 Degree Threads: 0.25-6.0mm.