5310-01-250-6305 WASHER,FLAT Index 5331-01-250-6307 O-RING

National Stock Number:
5310-01-250-6306

Federal Supply Class:
5310

National Item Identification Number:
012506306

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.


Manufacturer Information:
10110217A486GNIMIKKEISTOKESKUS NCB FINLAND
37288-109344ROCKWELL COLLINS, INC. DBA RC DISPLAYS SYSTEMS
37288-13M337WESS-DEL INCORPORATED


Techincal Specification:
MATERIALSTEEL COMP 440C OVERALL
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-S-763,COND A FED SPEC SINGLE MATERIAL RESPONSE OVERALL
SURFACE TREATMENTPASSIVATE OVERALL
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-35,TYPE 5 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
HARDNESS RATING55.0 ROCKWELL C MINIMUM AND
60.0 ROCKWELL C MAXIMUM
STYLE DESIGNATORRECESSED
HOLE DIAMETER0.385 INCHES MINIMUM AND
0.392 INCHES MAXIMUM
OUTSIDE DIAMETER0.750 INCHES NOMINAL
RECESS DIAMETER0.450 INCHES NOMINAL
MATERIAL THICKNESS0.035 INCHES MINIMUM AND
0.045 INCHES MAXIMUM
RECESS ANGLE100.0 DEGREES NOMINAL


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