Special Features:

Fdimensions & tolerances must conform to mil-std-8; must be clean and free from burrs; carbon steelcomp1009 through 1020; alt steel sae 1009 through sae 1020; heat treat: case harden all over per 8355701, method ii, case depth .005 to .025; spline data: 16/32 pitch--39 teeth, 3o degrees pressure angle, t.I.D.=2.500, p.D.=2.4375, r.D.=2.529; chordal space width at p.L.=.1081- .1181 cut to gage; spacer must pass freely between parallel plates spaced .130 apart by 2.90 min.Deep

Properties:

A circular-shaped item designed to maintain predetermined distance between assembled parts and/or for distributing pressure or preventing endwise movement between member parts. It has a solid cross-section and two flat parallel bearing surfaces. The distance between the bearing surfaces perpendicular to the axis of the centrally located hole shall not exceed 25 percent of the outside diameter. The diameter of the centrally located hole must exceed 75 percent of the outside diameter. Excludes laminated items. For items manufactured from impregnated graphite or lubricated nonmetallic materials, excluding felt or plastics, see gasket. For items manufactured from lubricated plastics, see bearing, washer, thrust. For items manufactured from lubricated felt, see felt, mechanical, preformed. Excludes disk, valve; insulator washer; and shim. See also spacer, plate and spacer, sleeve.