Bulk 5/16-18 Flat Head Socket Cap Screws – Alloy Steel – Zinc Bake CR+3 Length:500 Qty - 5/16"-18 x 2-1/4" (PT) 50 mm (M10 x 1

50 mm (M10 x 1

0 mm pitch forms high-strength threads in plastics

Bright zinc plating plus hydrogen-relief bake provides classic corrosion protection and RoHS compliance

Cut clean 1/4-20 threads directly into mild steel

Drive-size note: A 1/2-13 low head socket cap screw uses a 1/4" hex key

Bulk 5/16-18 Flat Head Socket Cap Screws – Alloy Steel – Zinc Bake CR+3 Length:500 Qty - 5/16"-18 x 2-1/4" (PT) 50 mm (M10 x 1Monster Overview Fix your project right the first time with Bulk 5 16 18 Flat Head Socket Cap Screws. These durable fasteners are manufactured from alloy steel, delivering reliable strength for machinery, equipment, and mechanical assemblies. The flat head (countersunk) design allows the screw to sit flush with the material surface, creating a clean and smooth finished appearance. These screws feature a hex socket drive, also known as an Allen drive