UNC SECHSKANT GEWINDESCHRAUBEN VOLLGEWINDESCHRAUBEN VERZINKT 1/4 5/16 3/8 7/16 1/2"

Hexagon head fully threaded UNC set screws. UNC High Tensile Set Screws. 1/4"UNC x 20tpi. 5/16"UNC x 18tpi. 3/8"UNC x 16tpi. 7/16"UNC x 14tpi. 1/2"UNC x 13tpi. All screws are fully threaded.

eBay