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 |
|---|---|---|
| ABMD | RECESS DIAMETER | 2.660 INCHES NOMINAL |
| ABMD | RECESS DIAMETER | 2.660 INCHES NOMINAL |
| MDCL | MATERIAL DOCUMENT AND CLASSIFICATION | QQ-A-200/3,ALLOY 2024,T4 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| TEST | TEST DATA DOCUMENT | 81349-MIL-I-6866 SPECIFICATION |
| STDC | SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | MIL-A-8625 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL |
| SFTT | SURFACE TREATMENT | ANODIZE OVERALL |
| ABKV | OUTSIDE DIAMETER | 3.290 INCHES NOMINAL |
| AAUB | HOLE DIAMETER | 2.4995 INCHES MINIMUM AND 2.5005 INCHES MAXIMUM |
| ABPX | MATERIAL THICKNESS | 2.4995 INCHES MINIMUM AND 2.5005 INCHES MAXIMUM |
| MATT | MATERIAL | ALUMINUM ALLOY 2024 OVERALL |
| ABMG | SHOULDER HEIGHT | 0.510 INCHES NOMINAL |
| STYL | STYLE DESIGNATOR | SHOULDERED AND RECESSED |
| AAVH | SHOULDER DIAMETER | 2.9995 INCHES MINIMUM AND 3.0000 INCHES MAXIMUM |
| CSTM | RECESS ANGLE | 90.0 DEGREES NOMINAL |
| CRTL | CRITICALITY CODE JUSTIFICATION | AAUB AND AAVH |
| CSYM | SURFACE FINISH | 90.0 MICROINCHES ALL SURFACES |