Part Number
Part Number:
NSN:
NIIN:
Item Name:
WASHER , CONCAVE
Definition:
A WASHER WHICH IS ROUND WITH A CENTRALLY LOCATED HOLE. ONE BEARING SURFACE IS SMOOTH, FLAT, AND UNBROKEN, THE OTHER BEARING SURFACE IS SMOOTH, UNBROKEN, AND IS RECESSED TO FORM A CURVED OR SPHERICAL CONTOUR. SEE ALSO WASHER (1), CONVEX. EXCLUDES WASHER (1), RECESSED AND BEARING, WASHER, THRUST.
CAGE Information
| Code | Company |
|---|---|
| 81349 | MILITARY SPECIFICATIONS PROMULGATED |
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 | 0.062 INCHES MINIMUM AND 0.082 INCHES MAXIMUM |
| STYL | STYLE DESIGNATOR | CONCAVE |
| CSYM | SURFACE FINISH | 125.0 MICROINCHES OUTER |
| AGAV | END ITEM IDENTIFICATION | HC130N NVIS AIRCRAFT |
| MATT | MATERIAL | STEEL COMP 4130 OVERALL OR STEEL COMP 8740 OVERALL |
| CSYM | SURFACE FINISH | 32.0 MICROINCHES INNER |
| CQFM | HARDNESS RATING | 40.0 ROCKWELL C MINIMUM AND 46.0 ROCKWELL C MAXIMUM |
| ABMH | RECESS DEPTH | 0.004 INCHES MINIMUM AND 0.014 INCHES MAXIMUM |
| AAUB | HOLE DIAMETER | 0.253 INCHES MINIMUM AND 0.263 INCHES MAXIMUM |
| ABGG | RADIUS | 0.218 INCHES MINIMUM AND 0.238 INCHES MAXIMUM |
| ABKV | OUTSIDE DIAMETER | 0.390 INCHES MINIMUM AND 0.400 INCHES MAXIMUM |
| SFTT | SURFACE TREATMENT | CADMIUM OVERALL |