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National Stock Number:
5310-00-196-1931
Federal Supply Class:
5310
National Item Identification Number:
001961931
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:
| 6410-30101-101 | 78286 | SIKORSKY AIRCRAFT CORPORATION |
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Techincal Specification:
| HARDNESS RATING | 34.0 ROCKWELL C MINIMUM AND 38.0 ROCKWELL C MAXIMUM | | HEAT TREATMENT | ANNEALED | | HOLE DIAMETER | 0.631 INCHES MINIMUM AND 0.643 INCHES MAXIMUM | | OUTSIDE DIAMETER | 1.052 INCHES MINIMUM AND 1.072 INCHES MAXIMUM | | MATERIAL DOCUMENT AND CLASSIFICATION | MIL-S-6758,C4 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL | | MATERIAL THICKNESS | 0.068 INCHES MINIMUM AND 0.088 INCHES MAXIMUM | | MATERIAL | STEEL COMP 4130 OVERALL | | MINIMUM TENSILE STRENGTH | 150000 POUNDS PER SQUARE INCH | | RECESS ANGLE | 45.0 DEGREES NOMINAL | | RECESS DIAMETER | 0.765 INCHES MINIMUM AND 0.785 INCHES MAXIMUM | | STYLE DESIGNATOR | RECESSED |
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