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 |
|---|---|---|
| MATT | MATERIAL | STEEL COMP 4130 OVERALL OR STEEL COMP 8740 OVERALL |
| ABKV | OUTSIDE DIAMETER | 0.742 INCHES MINIMUM AND 0.752 INCHES MAXIMUM |
| MDCL | MATERIAL DOCUMENT AND CLASSIFICATION | MIL-S-6758 MIL SPEC 1ST MATERIAL RESPONSE OVERALL OR MIL-S-18729 MIL SPEC 1ST MATERIAL RESPONSE OVERALL OR MIL-S-6049 MIL SPEC 2ND MATERIAL RESPONSE OVERALL |
| AAUB | HOLE DIAMETER | 0.500 INCHES MINIMUM AND 0.510 INCHES MAXIMUM |
| CQFM | HARDNESS RATING | 40.0 ROCKWELL C MINIMUM AND 46.0 ROCKWELL C MAXIMUM |
| CSYM | SURFACE FINISH | 32.0 MICROINCHES COUNTERBORE FACE |
| ABGG | RADIUS | 0.440 INCHES MINIMUM AND 0.460 INCHES MAXIMUM |
| ABPX | MATERIAL THICKNESS | 0.140 INCHES MINIMUM AND 0.160 INCHES MAXIMUM |
| FEAT | SPECIAL FEATURES | RADIUS OFFSET 0.430 IN.MIN 0.440 IN.MAX;WASHER STYLE:NO.37; |
| SFTT | SURFACE TREATMENT | CADMIUM OVERALL AND CHROMATE OVERALL |
| STDC | SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-416,TY 2,CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |