NBIS Approved Vendor 114USSFWTHZ2 114USSFWTHZ2

USS dimension thru-hardened flat washers are typically used with Grade 8 Bolt and Nut assemblies to provide a larger surface area under the head of the bolt or nut while providing a smooth hard surface for the nut to be tightened down onto. USS Flat Washers, having a bigger outside dimension than their SAE counterparts, will provide a larger bearing surface area in high stress applications. Using the largest washer possible provides for better distribution of the clamp load, which assists in providing a secure, trouble-free connection. USS thru-hardened steel flat washers are made to the dimensional requirements of ASME B18.21.1 Type A Wide Series and meet the material requirements of ASTM F436 for heat treated, quenched and tempered steel round flat washers with a thru-hardness (core) of Rc 38-45. Washers are finished with a Yellow Zinc Plating for corrosion resistance.

• Grade 8 flat washers in USS are measured in Inch sizes
• Made of thru hardened Grade 8 steel with a yellow zinc plating
• Used to provide ease of movement for spinning parts, or when the hole holding the fastener assembly is larger than the finishing nut
• Check below to see our size chart for inner and outer diameter and washer thickness
• IFI Tolerances Apply
• Washer Thickness may very +/- .02 depending on production run.