Part Number
Definition:
A WASHER, ROUND IN SHAPE, HAVING A CENTRALLY LOCATED HOLE. ONE BEARING SURFACE IS FLAT, THE OTHER SURFACE IS IN THE FORM OF A RAISED SHOULDER (BOSS) HAVING A FLAT BEARING SURFACE. EITHER OR BOTH OF THE BEARING SURFACES MUST BE BROKEN BY A COUNTERBORE, COUNTERSINK, OR SIMILAR SHAPED RECESS. THE THICKNESS OF THE SHOULDER (BOSS) MUST NOT EXCEED 25 PERCENT OF THE SHOULDER (BOSS) DIAMETER. FOR ITEMS HAVING A SHOULDER (BOSS) OF GREATER THICKNESS, USE BEARING, SLEEVE; BUSHING, SLEEVE; OR SPACER, SLEEVE. EXCLUDES INSULATOR, WASHER AND THRUST TYPE WASHERS.
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 |
|---|---|---|
| ABPX | MATERIAL THICKNESS | 0.065 INCHES MINIMUM AND 0.075 INCHES MAXIMUM |
| ABMG | SHOULDER HEIGHT | 0.139 INCHES MINIMUM AND 0.152 INCHES MAXIMUM |
| MATT | MATERIAL | STEEL COMP 4340 OVERALL |
| AAVH | SHOULDER DIAMETER | 2.475 INCHES NOMINAL |
| ABKV | OUTSIDE DIAMETER | 3.140 INCHES NOMINAL |
| ABMD | RECESS DIAMETER | 2.3535 INCHES MINIMUM AND 2.3540 INCHES MAXIMUM |
| CSTM | RECESS ANGLE | 80.0 DEGREES MINIMUM AND 100.0 DEGREES MAXIMUM |
| STYL | STYLE DESIGNATOR | SHOULDERED AND RECESSED |
| AAUB | HOLE DIAMETER | 2.2535 INCHES MINIMUM AND 2.2540 INCHES MAXIMUM |
| MDCL | MATERIAL DOCUMENT AND CLASSIFICATION | MIL-S-5000 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| CSYM | SURFACE FINISH | 20.0 MICROINCHES TOP |