5310-99-955-2932

Flat Washer

5310999552932 999552932 BS3410 BS3410TBL1NO4 991-4-00411-003 SM50550-101 QA13006/X C20595 ITEM 16 30-281-011-27 910-030-0021 852405 1250D02 REF 54 1250D02/54 TABLE 1 AMERICAN NO. SIZE 4 S19940

A washer having a centrally located hole with a solid or laminated cross-section and two flat parallel bearing surfaces. The hole must be 75 percent or less than the largest dimension and the bearing surface finish is greater than 32 microinch (0.8 micrometer). The thickness cannot exceed 25 percent of the largest outside dimension. When the largest outside dimension is less than 1/4 inch or 6mm, the thickness must be 0.006 inches (0.15mm) or greater and for items 1/4 inch (6mm) or larger, the thickness must be 0.016 inches (0.4mm) or greater. The maximum tolerance is applied to dimensions and used as a determining factor. Items with separable lamination use SHIM. For items fabricated from ceramic or electrically rated materials by specification or industry standards use INSULATOR (1), WASHER. Excludes DISK, VALVE, graphite impregnated and lubricated items. View more Flat Washer