3m Peltor Ear Muffs,Over-the-Head,NRR 21dB H6A-V

Hex Head Lag Screw, Material Steel, Finish Hot Dipped Galvanized, Screw Size 3/8 In., Fastener Length 4 in, Threads per Inch 7, Thread Style Partially Threaded, Minimum Thread Length 2 13/32 in, Dimensional Standards ASME B18.2.1, Pack Size Small, System of Measurement Inch, Drive External Hex, Drive Size 9/16 in, Head Height 0.25 in, Head Style Hex, Head Width 0.388 in, Package Quantity 50