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National Stock Number: 5310-01-199-6208
Federal Supply Class: 5310
National Item Identification Number: 011996208
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:
425355-1 | 80020 | NAVAL AIR WARFARE CENTER AIRCRAFT DIVISION CODE 4.8.8.0.0.B BLDG 148-2 |
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Techincal Specification:
TOP RECESS ANGLE | 90.0 DEGREES NOMINAL | TOP RECESS DIAMETER | 0.592 INCHES MINIMUM AND 0.607 INCHES MAXIMUM | BOTTOM RECESS ANGLE | 90.0 DEGREES NOMINAL | BOTTOM RECESS DIAMETER | 0.592 INCHES MINIMUM AND 0.607 INCHES MAXIMUM | HARDNESS RATING | 38.0 ROCKWELL C MINIMUM AND 42.0 ROCKWELL C MAXIMUM | HOLE DIAMETER | 0.530 INCHES MINIMUM AND 0.545 INCHES MAXIMUM | MATERIAL DOCUMENT AND CLASSIFICATION | ASTM A193,GR B7 ASSN STD SINGLE MATERIAL RESPONSE OVERALL | MATERIAL THICKNESS | 0.250 INCHES NOMINAL | MATERIAL | STEEL COMP 4140 OVERALL | III PART NAME ASSIGNED BY CONTROLLING AGENCY | NAVY SPECIAL PROJECT | PROPRIETARY CHARACTERISTICS | PACS | OUTSIDE DIAMETER | 1.250 INCHES NOMINAL | STYLE DESIGNATOR | RECESSED BOTH SIDES | SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | DOD-P-16232,TY Z,CL 3 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL | SURFACE TREATMENT | ZINC AND PHOSPHATE OVERALL |
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