Product Parameters Name: Thread Pattern/Thread Plug Gauge Material: Carbon Steel Specifications: 60 Degree Metric / 55 Degree Imperial Number Of Pieces: 20 Pcs Purpose: Used To Check The Pitch Of The Thread, The Pitch Of Each Piece Is Different Pitch: 60°:0/0/0/0/0/1/1/1/1/2/2/3/3/4/4/5/5/6/6/7 55°:4/4/5/6/7/8/9/10/11/12/13/14/16/18/19/20/22/24/28/32/48