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Screw Pitch Gages
Includes a substantial steel case with a number of folding leaves at both ends. Made in USA.
473 Features 30 leaves, 6 to 60 TPI range, with positive stop and 11 1/2 and 27 Pipe thread pitches.
474 Features 28 leaves, 4 to 80 TPI range, with locking device and 11 1/2 and 27 pipe thread pitches.
156M Features 28 leaves, 0.25-2.50 mm TPI range, with locking device and 60° threads.