| Item Name | Washer Recessed |
| Federal Supply Group (FSG) | Hardware and Abrasives |
| Federal Supply Class (FSC) | 5310 Nuts and Washers |
| National Item Identification Number (NIIN) | 01-398-4237 (013984237) |
| NCB Code | USA (01) |
| Manufacturer | Military Standards Corp, National Aerospace Standards Com |
| MRC | Criteria | Characteristic |
|---|---|---|
| AAUB | HOLE DIAMETER | 0.501 INCHES MINIMUM AND 0.505 INCHES MAXIMUM |
| ABKV | OUTSIDE DIAMETER | 0.994 INCHES MINIMUM AND 1.004 INCHES MAXIMUM |
| CQFM | HARDNESS RATING | 39.0 ROCKWELL C MINIMUM AND 43.0 ROCKWELL C MAXIMUM |
| CQJW | TOP RECESS DIAMETER | 0.619 INCHES MINIMUM AND 0.629 INCHES MAXIMUM |
| CSML | BOTTOM RECESS DIAMETER | 0.619 INCHES MINIMUM AND 0.629 INCHES MAXIMUM |
| FEAT | SPECIAL FEATURES | . |
| MATT | MATERIAL | STEEL COMP 4130 OVERALL |
| MDCL | MATERIAL DOCUMENT AND CLASSIFICATION | MIL-S-5059,TY 302,1/2 HARD MIL SPEC 1ST MATERIAL RESPONSE OVERALL OR MIL-S-18729 MIL SPEC 2ND MATERIAL RESPONSE OVERALL |
| STYL | STYLE DESIGNATOR | RECESSED BOTH SIDES |
| CRSD | TOP RECESS ANGLE | 90.0 DEGREES NOMINAL |
| SFTT | SURFACE TREATMENT | CADMIUM OVERALL |
| STDC | SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-416,TY 2,CL 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| CRKG | BOTTOM RECESS ANGLE | 90.0 DEGREES NOMINAL |
| ABPX | MATERIAL THICKNESS | 0.149 INCHES MINIMUM AND 0.163 INCHES MAXIMUM |
| Relevant Components for NSN - 5310-01-398-4237, 5310013984237 | ||||
| 5320-01-093-5687 (5320010935687) | 5340-00-286-8500 (5340002868500) | 5310-00-797-4430 (5310007974430) | 5331-01-548-6940 (5331015486940) | |
| 5340-01-389-2408 (5340013892408) | 5340-01-499-3481 (5340014993481) | 5310-01-418-9739 (5310014189739) | 5320-01-419-8697 (5320014198697) | |
| 5340-01-681-6722 (5340016816722) | 5340-01-620-4639 (5340016204639) | 5340-01-481-2087 (5340014812087) | 5331-01-097-0869 (5331010970869) | |
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