spec :structurer washer size :m3--m64 material :Carbon Steel, Alloy Steel, Stainless Steel ... washersize :m4--m64material :Carbon Steel, Alloy Steel, Stainless Steel, Copper, Nylon, Plastic, etccoating :zinc .plain ,HDG Product rangeBOLTS: hex bolts, heavy ... , stud boltsNUTS: hex nuts, heavy hex nuts, hex flange nuts, nylon insert lock nuts, cap nuts, slotted nuts, rivet nutWASHERS: flat ...