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Part Number:
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Item Name:
WASHER , RECESSED

Definition:

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.

CAGE Information

Code Company
84955 KAMAN AEROSPACE CORPORATION DBA HELI

Federal Supply Class

Title

NUTS AND WASHERS

Inclusions:

INCLUDES LOCKNUTS; EYE NUTS; PLAIN NUTS; CASTELLATED NUTS; WING NUTS; PLATE NUTS; PUSH ON NUTS; CONCAVE AND CONVEX WASHERS; FLAT WASHERS; KEYED WASHERS; LOCK WASHERS; SHOULDERED WASHERS; SPLIT WASHERS.

Exclusions:

EXCLUDES BEARING THRUST WASHERS (FSC 3120); SHIMS (FSC 5365); RING SPACERS (FSC 5365); PLATE SPACERS (FSC 5365); LOCK RINGS (FSC 5365).

Characteristics (Decoded)

MRC Requirements Statement Clear Text Reply
AAUB HOLE DIAMETER 1.576 INCHES MINIMUM AND 1.582 INCHES MAXIMUM
CQFM HARDNESS RATING 27.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM
ABPX MATERIAL THICKNESS 0.160 INCHES NOMINAL
ABMH RECESS DEPTH 0.093 INCHES NOMINAL
ABKV OUTSIDE DIAMETER 1.850 INCHES MINIMUM AND 1.860 INCHES MAXIMUM
MATT MATERIAL STEEL OVERALL
ABMD RECESS DIAMETER 1.664 INCHES MINIMUM AND 1.674 INCHES MAXIMUM
ABKW OVERALL HEIGHT 0.159 INCHES MINIMUM AND 0.160 INCHES MAXIMUM
SFTT SURFACE TREATMENT PHOSPHATE OVERALL
STYL STYLE DESIGNATOR RECESS
CSTM RECESS ANGLE 90.0 DEGREES NOMINAL

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