pplications : The wave spring washers in this range are ideal lock washers having a wide range of applications in many industries including Avionics, Telecommunications, Automotive and Chemical Engineering. Material : Manufactured in either Beryllium Copper or Austenitic Stainless Steel - both have excellent anti-corrosion properties and a high resisance to permanent set under compression. All measurements in imperial (inches)BA Unified and Imperial BS 3401 : 1961 Bolt or Screw SizeD1 Outside Dia.D2 Inside Dia.t ThicknessL Free HeightBeryllium Copper Code No.Stainless Steel Code No. 10BA 0.150 0.077 .006 .017 501/10 501/50 8BA 0.206 0.097 .018 501/12 501/52 6BA 0.250 0.127 .021 501/14 501/54 4BA 0.300 0.154 .0084 .028 501/16 501/56 3BA 0.340 0.178 .0108 .030 501/17 501/57 2BA 0.375 0.205 .0124 .032 501/18 501/58 0BA 0.500 0.253 .0148 .042 501/19 501/59 1/4" 0.500 0.268 .042 501/20 501/60 5/16" 0.600 0.334 .052 501/21 501/61 3/8" 0.700 0.408 .022 .063 501/23 501/63 7/16" 0.820 0.471 .070 501/24 501/64 1/2" 0.950 0.533 .076 501/25 501/65 Our spring washers are of optimal merits. They are open in a varied range and specifications. The spring lock washer we sell is very popular in hardware industries as they can be easily fitted with all kinds of nuts and bolts. Our copper spring washer is efficiently used for locking bolts without any difficulties as it is available in different size. To assist you more we also supply these spring washers as per your order. We are the key spring washer manufacturer in the industry. And we are also among the most reliable spring washer suppliers in India for our customer centric approach