Part Number
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 |
|---|---|
| 78286 | SIKORSKY AIRCRAFT CORPORATION |
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 | 1.010 INCHES MINIMUM AND 1.025 INCHES MAXIMUM |
| ABKV | OUTSIDE DIAMETER | 1.620 INCHES MINIMUM AND 1.640 INCHES MAXIMUM |
| SFTT | SURFACE TREATMENT | ANODIZE OVERALL OR CHROMATE OVERALL |
| MATT | MATERIAL | ALUMINUM ALLOY 5052 OVERALL |
| STDC | SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | MIL-A-8625 MIL SPEC 1ST TREATMENT RESPONSE OVERALL OR MIL-C-5541 MIL SPEC 2ND TREATMENT RESPONSE OVERALL |
| ABMD | RECESS DIAMETER | 1.140 INCHES MINIMUM AND 1.160 INCHES MAXIMUM |
| ABPX | MATERIAL THICKNESS | 0.080 INCHES NOMINAL |
| MDCL | MATERIAL DOCUMENT AND CLASSIFICATION | QQ-A-250/8,H36 FED SPEC SINGLE MATERIAL RESPONSE OVERALL OR QQ-A-250/8,H34 FED SPEC SINGLE MATERIAL RESPONSE OVERALL OR QQ-A-250/8,H38 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| STYL | STYLE DESIGNATOR | RECESS |
| CSTM | RECESS ANGLE | 90.0 DEGREES NOMINAL |