5310-01-131-2957 WASHER,SHOULDERED AND RECESSED Index 5310-01-131-2959 WASHER,SPRING TENSION

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.


Manufacturer Information:
10109600A486GNIMIKKEISTOKESKUS NCB FINLAND
74A110681-20031U854NWI WICHITA LLC
74A110681-200325989STEELVILLE MANUFACTURING CO
74A110681-200376301THE BOEING COMPANY


Techincal Specification:
HOLE DIAMETER0.312 INCHES MINIMUM AND 0.319 INCHES MAXIMUM
OUTSIDE DIAMETER2.900 INCHES NOMINAL
MATERIALALUMINUM ALLOY 7075 OVERALL
RECESS ANGLE90.0 DEGREES NOMINAL
RECESS DIAMETER0.375 INCHES MINIMUM AND 0.405 INCHES MAXIMUM
SHOULDER DIAMETER1.830 INCHES NOMINAL
SHOULDER HEIGHT0.140 INCHES NOMINAL
SPECIAL FEATURESBEARING SURFACE CONVEX 3.000 IN. RADIUS


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