Machine Screw, Head Type Round, Carbon Steel, Length 1/2", Drive Type Combination Slotted/Phillips, Finish Zinc Plated, Thread Size 4-40, Driver Size #1, Head Dia. 0.193", Head Height 0.075", Rockwell Hardness B70, Meets/Exceeds ANSI B18.6.3, Package Quantity 100 Features Finish: zinc plated Item: Machine Screw Length: 1/2" Material: carbon steel Thread Size: 4-40 Drive Type: Combination Slotted/Phillips Driver Size: #1 Head Type: Round Meets/Exceeds: ANSI B18.6.3 Rockwell Hardness: B69 to B100 Head Dia.: 0.211"-0.193" Head Height: 0.086"-0.075" System of Measurement: Inch

Machine Screw, Head Type Round, Carbon Steel, Length 1/2", Drive Type Combination Slotted/Phillips, Finish Zinc Plated, Thread Size 4-40, Driver Size #1, Head Dia. 0.193", Head Height 0.075", Rockwell Hardness B70, Meets/Exceeds ANSI B18.6.3, Package Quantity 100 Features Finish: zinc plated Item: Machine Screw Length: 1/2" Material: carbon steel Thread Size: 4-40 Drive Type: Combination Slotted/Phillips Driver Size: #1 Head Type: Round Meets/Exceeds: ANSI B1