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1/4 Inch Imperial Rectangular Profile Spring Washers (ANSI B18.21.1) - A2 Stainless Steel Description The 1/4 inch Imperial Rectangular Profile Spring Washers (ANSI B18.21.1) - A2 Stainless Steel has the following features: 0.062 inch Height (S) 0.252 inch Internal Diameter (B) A2-70 Stainless Steel Material Specification 1/4 inch Size Self Colour Finish 0.109 inch Uncompressed Height (T) +/- 0.13mm General Tolerance Imperial Metric or Imperial? ANSI B18.21.1 Manufacturing Standard 0.487 inch External Diameter (D) A2 Stainless Steel Material UOM --------- 100 PCS What Are Lock washers? Lock washers are specially designed to keep threaded fasteners from loosening. They prevent vibrations and some have external teeth to prevent rotation. These washers are often found in airplanes and in structural applications. Materials Lock washers can be manufactured from A2 Stainless Steel. Fullerkreg are the experts in fastener solutions! Product undergoes three levels of quality testing (pre-production, 1st article, pre-shipment). Each completed kit is weight-verified, and samples from each lot are inspected prior to shipping. Yes, You CAN get all of Your fasteners from a single source-Fullerkreg