Tamper Resistant Screw Head Type Pan Material 18-8 Stainless Steel Finish Plain Drive Spanner Thread Size #4-40 Fastener Length 3/8 in Head Width 0.219 in Head Height 0.068 in Drive Size #4 Dimensional Standards ASME B18.6.3 Pack Size Small Type Tamper Resistant Screw Maximum Head Width 0.219 in Minimum Head Width 0.205 in Maximum Head Height 0.068 in Minimum Head Height 0.058 in System of Measurement Inch Thread Type Coarse Package Quantity 50