AS9120B, ISO 9001:2015, and FAA AC 0056B Accredited
| Item Name | Washer Recessed |
| Federal Supply Group (FSG) | Hardware and Abrasives |
| Federal Supply Class (FSC) | 5310 Nuts and Washers |
| National Item Identification Number (NIIN) | 01-256-5234 (012565234) |
| NCB Code | USA (01) |
| Manufacturer | Reid Products Inc, Rolls Royce Corporation, Extex Ltd, Aviall Services, Inc |
| MRC | Criteria | Characteristic |
|---|---|---|
| AAUB | HOLE DIAMETER | 0.196 INCHES MINIMUM AND 0.206 INCHES MAXIMUM |
| ABKV | OUTSIDE DIAMETER | 0.580 INCHES NOMINAL |
| ABPX | MATERIAL THICKNESS | 0.082 INCHES MINIMUM AND 0.092 INCHES MAXIMUM |
| CQFM | HARDNESS RATING | 36.0 ROCKWELL C MINIMUM AND 40.0 ROCKWELL C MAXIMUM |
| CQJW | TOP RECESS DIAMETER | 0.230 INCHES NOMINAL |
| CRKG | BOTTOM RECESS ANGLE | 90.0 DEGREES NOMINAL |
| CRSD | TOP RECESS ANGLE | 90.0 DEGREES NOMINAL |
| CSML | BOTTOM RECESS DIAMETER | 0.230 INCHES NOMINAL |
| MATT | MATERIAL | STEEL COMP 8735 OVERALL OR STEEL COMP 4130 OVERALL OR STEEL COMP 8740 OVERALL |
| MDCL | MATERIAL DOCUMENT AND CLASSIFICATION | AMS 6357 ASSN STD 1ST MATERIAL RESPONSE OVERALL OR AMS 6350 ASSN STD 2ND MATERIAL RESPONSE OVERALL OR AMS 6358 ASSN STD 3RD MATERIAL RESPONSE OVERALL |
| SFTT | SURFACE TREATMENT | OXIDE FILM OVERALL |
| STDC | SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | AMS 2485 ASSN STD SINGLE TREATMENT RESPONSE OVERALL |
| STYL | STYLE DESIGNATOR | RECESSED BOTH SIDES |
| Relevant Components for NSN - 5310-01-256-5234, 5310012565234 | ||||
| 5305-00-151-0390 (5305001510390) | 5305-00-162-0212 (5305001620212) | 5330-01-021-6193 (5330010216193) | 5306-01-667-2305 (5306016672305) | |
| 5305-00-702-7578 (5305007027578) | 5306-01-467-0619 (5306014670619) | 5340-14-507-0973 (5340145070973) | 5330-01-545-5049 (5330015455049) | |
| 5331-01-433-9967 (5331014339967) | 5330-01-176-0563 (5330011760563) | 5330-20-001-0516 (5330200010516) | 5305-00-550-9932 (5305005509932) | |
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