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 |
|---|---|---|
| AAUB | HOLE DIAMETER | 12.0 MILLIMETERS MINIMUM AND 12.1 MILLIMETERS MAXIMUM |
| STYL | STYLE DESIGNATOR | CONCAVE |
| ABPX | MATERIAL THICKNESS | 4.2 MILLIMETERS NOMINAL |
| MATT | MATERIAL | STEEL COMP 1016 OVERALL OR STEEL COMP 1013 OVERALL OR STEEL COMP 1010 OVERALL OR STEEL COMP 1012 OVERALL OR STEEL COMP 1019 OVERALL OR STEEL COMP 1017 OVERALL OR STEEL COMP 1018 OVERALL OR STEEL COMP 1015 OVERALL OR STEEL COMP 1011 OVERALL OR STEEL COMP 1020 OVERALL |
| SFTT | SURFACE TREATMENT | ZINC OVERALL AND CHROMATE OVERALL |
| ABKV | OUTSIDE DIAMETER | 20.8 MILLIMETERS MINIMUM AND 21.0 MILLIMETERS MAXIMUM |
| CQFM | HARDNESS RATING | 88.0 ROCKWELL SUPERFICIAL 15-N MAXIMUM |
| STDC | SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | ASTM B633 TY 2,CL FE/ZN 13 ASSN STD SINGLE TREATMENT RESPONSE OVERALL |
| ABGG | RADIUS | 18.5 MILLIMETERS NOMINAL |