5Pcs 1/4-20 3/8-16 Black Hex Socket Head Cap Screws BSW Allen Head Hexagon Socket Bolts 12.9 Grade Carbon Steel Black bolt hex bolts Concave head screw inside hexagonal bolt Cup head screw cylinder-headed screw Product Description:
Product Name: Black Hex Socket Head Cap Screws BSW Allen Head Hexagon Socket Bolts
Material: Grade 12.9 Carbon Steel
Surface Treatment: Blackening
Specification:1/4-20 3/8-16
Size Description: Eg M3/8-16*1/2 (Diameter=3/8 inches, Thread Number=16 ,Length=1/2 inches) Without Head Length