material: A2-70 304 Stainless steel
M3x16 mean the diameter of thread is 3mm(d), it is Metric screws,Tolerance: ±0.15mm
the length of screw thread is 16mm(L),as the photo
if you need to buy nut\Spring Split Lock Washer Elastic Gasket\Flat Washer\ the length 35-60mm\the length 65-100mm,please search in our store or contact to we.
20pcs M3 M4 M5 M6 6/8/10/12/14/16/18/20/25/30 mm #A2-70 #304 #Stainless #steel #Cross Phillips Pan Head Screw Round Bolt