5310-00-196-1930 WASHER,RECESSED Index 5940-00-196-1933 TERMINAL BOARD

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.


Manufacturer Information:
6410-30101-10178286SIKORSKY AIRCRAFT CORPORATION


Techincal Specification:
HARDNESS RATING34.0 ROCKWELL C MINIMUM AND 38.0 ROCKWELL C MAXIMUM
HEAT TREATMENTANNEALED
HOLE DIAMETER0.631 INCHES MINIMUM AND 0.643 INCHES MAXIMUM
OUTSIDE DIAMETER1.052 INCHES MINIMUM AND 1.072 INCHES MAXIMUM
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-S-6758,C4 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
MATERIAL THICKNESS0.068 INCHES MINIMUM AND 0.088 INCHES MAXIMUM
MATERIALSTEEL COMP 4130 OVERALL
MINIMUM TENSILE STRENGTH150000 POUNDS PER SQUARE INCH
RECESS ANGLE45.0 DEGREES NOMINAL
RECESS DIAMETER0.765 INCHES MINIMUM AND 0.785 INCHES MAXIMUM
STYLE DESIGNATORRECESSED


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