These are one of the most common elements used in construction and machine industry. Bolts refer to the larger threaded fasteners that are designed to be used with nuts or in tapped holes while screws refer to smaller (less than 1/4 inch) threaded fasteners with tapered shafts used in un-threaded substrates. Specifications are as follows:
Stainless Steel (AISI 202, 304 & 316)
METRIC, BSW, BSF UNC, UNF (as required )
Size Range :
M3 TO M20 - 1/8" TO 3/4"
Length Range :
8 mm to 150 mm - 3/8" to 6"