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National Stock Number: 5310-01-131-2958
Federal Supply Class: 5310
National Item Identification Number: 011312958
Description: WASHER,SHOULDERED AND RECESSED
Detail: A washer, round in shape, having a centrally located hole. One bearing surface is flat, the other surface is in the form of a raised shoulder (boss) having a flat bearing surface. Either or both of the bearing surfaces must be broken by a counterbore, countersink, or similar shaped recess. The thickness of the shoulder (boss) must not exceed 25 percent of the shoulder (boss) diameter. For items having a shoulder (boss) of greater thickness, use BEARING, SLEEVE; BUSHING, SLEEVE; or SPACER, SLEEVE. Excludes INSULATOR, WASHER and thrust type washers.
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Manufacturer Information:
10109600 | A486G | NIMIKKEISTOKESKUS NCB FINLAND | 74A110681-2003 | 1U854 | NWI WICHITA LLC | 74A110681-2003 | 25989 | STEELVILLE MANUFACTURING CO | 74A110681-2003 | 76301 | THE BOEING COMPANY |
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Techincal Specification:
HOLE DIAMETER | 0.312 INCHES MINIMUM AND 0.319 INCHES MAXIMUM | OUTSIDE DIAMETER | 2.900 INCHES NOMINAL | MATERIAL | ALUMINUM ALLOY 7075 OVERALL | RECESS ANGLE | 90.0 DEGREES NOMINAL | RECESS DIAMETER | 0.375 INCHES MINIMUM AND 0.405 INCHES MAXIMUM | SHOULDER DIAMETER | 1.830 INCHES NOMINAL | SHOULDER HEIGHT | 0.140 INCHES NOMINAL | SPECIAL FEATURES | BEARING SURFACE CONVEX 3.000 IN. RADIUS |
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