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National Stock Number:
5310-01-076-9428
Federal Supply Class:
5310
National Item Identification Number:
010769428
Description:
WASHER,RECESSED
Detail:
A WASHER OF ANY PERIPHERAL SHAPE HAVING A CENTRALLY LOCATED HOLE. BOTH BEARING SURFACES ARE PARALLEL AND FLAT, BUT ONE OR BOTH OF THE BEARING SURFACES MUST BE BROKEN BY A COUNTERBORE, COUNTERSINK, OR SIMILARLY SHAPED RECESS. THE THICKNESS MUST NOT EXCEED 25 PER CENT OF THE OUTSIDE DIAMETER OR THE LARGEST OUTSIDE DIMENSION. THE MAXIMUM LIMIT OF THE TOLERANCE OR RANGE APPLIED TO THE THICKNESS AND/OR LARGEST OUTSIDE DIMENSION MUST BE USED TO DETERMINE COMPLIANCE. EXCLUDES WASHER, CONCAVE, RETAINER, PACKING, AND THRUST TYPE WASHERS. SEE ALSO SPACER, SLEEVE; AND SPACER, STEPPED.
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Manufacturer Information:
| A51B21644-21 | 26512 | NORTHROP GRUMMAN SYSTEMS CORPORATION | | A51B21644-21 | 61174 | NORTHROP GRUMMAN SYSTEMS CORPORATION | | A51B21644-21 | 79RG9 | NORTHROP GRUMMAN SYSTEMS CORPORATION |
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Techincal Specification:
| MATERIAL | STEEL OVERALL | | MATERIAL DOCUMENT AND CLASSIFICATION | GM1013,COMP D6AC MFR REF SINGLE MATERIAL RESPONSE OVERALL | | SURFACE TREATMENT | CADMIUM OVERALL | | SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | MIL-C-8837,TYPE 2,CLASS 1 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL | | HARDNESS RATING | 46.0 ROCKWELL C MINIMUM AND | | 49.0 ROCKWELL C MAXIMUM | | STYLE DESIGNATOR | RECESSED | | HOLE DIAMETER | 0.514 INCHES MINIMUM AND | | 0.523 INCHES MAXIMUM | | OUTSIDE DIAMETER | 1.550 INCHES NOMINAL | | RECESS DIAMETER | 1.014 INCHES NOMINAL | | MATERIAL THICKNESS | 0.270 INCHES NOMINAL | | RECESS ANGLE | 100.0 DEGREES NOMINAL | | SURFACE FINISH | 125.0 MICROINCHES ALL SURFACES | | SPECIAL FEATURES | TOP SURFACE CHAMFERED 0.200 IN. BY 45 DEG | | PART NAME ASSIGNED BY CONTROLLING AGENCY | NAVY SPECIAL PROJECT |
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