| Item Name | Washer Recessed |
| Federal Supply Group (FSG) | Hardware and Abrasives |
| Federal Supply Class (FSC) | 5310 Nuts and Washers |
| National Item Identification Number (NIIN) | 01-121-8526 (011218526) |
| NCB Code | USA (01) |
| Manufacturer | Military Standards Corp, Zf Industrieantriebe Witten Gmbh, Oto Melara Spa Unita, Nimikkeistokeskus Ncb Finland, National Aerospace Standards Com |
| Part Number | Manufacturer | Item Name | RFQ |
|---|---|---|---|
| MS21299C3 | military standards corp | washer recessed | RFQ |
| MS21299-C3 | zf industrieantriebe witten gmbh | washer recessed | RFQ |
| 721009663500 | oto melara spa unita | washer recessed | RFQ |
| 10109387 | nimikkeistokeskus ncb finland | washer recessed | RFQ |
| MS21299C3 | national aerospace standards com | washer recessed | RFQ |
| MRC | Criteria | Characteristic |
|---|---|---|
| AAUB | HOLE DIAMETER | 0.191 INCHES MINIMUM AND 0.195 INCHES MAXIMUM |
| ABKV | OUTSIDE DIAMETER | 0.377 INCHES MINIMUM AND 0.387 INCHES MAXIMUM |
| ABMD | RECESS DIAMETER | 0.280 INCHES MINIMUM AND 0.290 INCHES MAXIMUM |
| ABPX | MATERIAL THICKNESS | 0.067 INCHES MINIMUM AND 0.069 INCHES MAXIMUM |
| CQFM | HARDNESS RATING | 39.0 ROCKWELL C MINIMUM AND 45.0 ROCKWELL C MAXIMUM |
| CSTM | RECESS ANGLE | 90.0 DEGREES NOMINAL |
| MATT | MATERIAL | STEEL COMP 4130 OVERALL |
| MDCL | MATERIAL DOCUMENT AND CLASSIFICATION | MIL-S-6758 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL OR MIL-S-18729 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| SFTT | SURFACE TREATMENT | CADMIUM OVERALL AND CHROMATE OVERALL |
| STDC | SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-416,TY 2,CL 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| STYL | STYLE DESIGNATOR | RECESSED |
| Relevant Components for NSN - 5310-01-121-8526, 5310011218526 | ||||
| 5320-01-318-6843 (5320013186843) | 5340-01-557-4760 (5340015574760) | 5340-00-336-3776 (5340003363776) | 5340-01-560-8528 (5340015608528) | |
| 5330-01-684-2979 (5330016842979) | 5310-01-185-8686 (5310011858686) | 5360-00-394-4491 (5360003944491) | 5320-01-267-6376 (5320012676376) | |
| 5315-00-432-8021 (5315004328021) | 5315-01-271-9296 (5315012719296) | 5340-01-353-1927 (5340013531927) | 5320-01-413-1816 (5320014131816) | |
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