uxcell 40pcs Round Rubber End Caps 1 8" 1 4" 3 8" 1 2" Grey Vinyl Cover Screw Thread Protectors Assortment Kit(3mm 6mm 9mm 12mm) 1 8" 1 4" 3 8" 1 2" 40 auspowers_batchthree 0 x 40mm Hex Socket sold2024 0 x 40mm Hex Socket Head Screws Head Type: Flat Round Head Specification: Thread Diameter 6mm Drive Size: Allen Drive Hex Drive 4mm Material: 304 Stainless Steel 18 8 About Hex Socket Head Screws Hex socket head cap screws are precision threaded fasteners with an internal socket drive (also called allen hex drive) for installing in areas with limited side clearance the mark point is an indispensable auxiliary positioning tool and calibration tool in the fields of optical surveying and mapping 1 8" 1 4" 3 8" 1 2" INNER DIA 1 8" 1 4" 3 8" 1 2" Inner Dia Grey Vinyl Round End Cap Covers as pliable protective seals for metal chair tips