| Item Name | Washer Recessed |
| Federal Supply Group (FSG) | Hardware and Abrasives |
| Federal Supply Class (FSC) | 5310 Nuts and Washers |
| National Item Identification Number (NIIN) | 01-391-9112 (013919112) |
| NCB Code | USA (01) |
| Manufacturer | Northrop Grumman Systems Corporation, Parker Hannifin Corporation |
| MRC | Criteria | Characteristic |
|---|---|---|
| CSTM | RECESS ANGLE | 90.0 DEGREES NOMINAL |
| MDCL | MATERIAL DOCUMENT AND CLASSIFICATION | MIL-S-18729 MIL SPEC SINGLE MATERIAL RESPONSE BODY OR MIL-S-6758 MIL SPEC SINGLE MATERIAL RESPONSE BODY |
| STDC | SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | MIL-C-26074,CL2,GRB MIL SPEC SINGLE TREATMENT RESPONSE BODY |
| AAUB | HOLE DIAMETER | 0.238 INCHES MINIMUM AND 0.242 INCHES MAXIMUM |
| ABKV | OUTSIDE DIAMETER | 0.490 INCHES MINIMUM AND 0.510 INCHES MAXIMUM |
| MATT | MATERIAL | RUBBER FLUOROSILICONE CLASS FQ SEALING ELEMENT |
| MATT | MATERIAL | STEEL COMP 4130 BODY |
| MDCL | MATERIAL DOCUMENT AND CLASSIFICATION | MIL-R-25988 MIL SPEC SINGLE MATERIAL RESPONSE SEALING ELEMENT |
| ABPX | MATERIAL THICKNESS | 0.090 INCHES MINIMUM AND 0.110 INCHES MAXIMUM |
| SFTT | SURFACE TREATMENT | NICKEL BODY |
| Relevant Components for NSN - 5310-01-391-9112, 5310013919112 | ||||
| 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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