4-40 UNC-3B, 6-32 UNC-3B ,8-32 UNC-3B ,10-32 UNC-3B ,1/4-20 UNC-3B ,5/6 UNC-3B 3/8-16 UNC-3B ,1/2 -13 UNC-3B
Ronnd body ,plain, flat head with Unified threads
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