Thread - UNC. Grade - A2 Stainless Steel. 4-40 3/16" 0.19" 0.07" 40. 4-40 1/4" 0.19" 0.07" 40. 4-40 3/8" 0.19" 0.07" 40. 4-40 5/8" 0.19" 0.07" 40. TECHNICAL INFORMATION. 1/4" 1 1/2" 0.45" 0.17" 20.
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