| Item Name | Washer Key |
| Federal Supply Group (FSG) | Hardware and Abrasives |
| Federal Supply Class (FSC) | 5310 Nuts and Washers |
| National Item Identification Number (NIIN) | 00-527-5581 (005275581) |
| NCB Code | USA (00) |
| Manufacturer | Springfield Armory |
| MRC | Criteria | Characteristic |
|---|---|---|
| AAUB | HOLE DIAMETER | 0.440 INCHES MINIMUM AND 0.450 INCHES MAXIMUM |
| ABKV | OUTSIDE DIAMETER | 0.625 INCHES NOMINAL |
| ABKY | EXTERNAL PREBENT KEY LENGTH | 0.128 INCHES NOMINAL |
| ABLF | EXTERNAL PREBENT KEY WIDTH | 0.187 INCHES MINIMUM AND 0.219 INCHES MAXIMUM |
| ABLS | DISTANCE FROM CENTERLINE TO INSIDE OF PREBENT KEY | 0.4372 INCHES NOMINAL |
| ABLX | OVERALL DISTANCE INCLUDING KEYS | 0.790 INCHES MINIMUM AND 0.810 INCHES MAXIMUM |
| ABPX | MATERIAL THICKNESS | 0.0338 INCHES MINIMUM AND 0.0538 INCHES MAXIMUM |
| CSKN | EXTERNAL PREBENT KEY ANGLE | 90.0 DEGREES NOMINAL |
| FEAT | SPECIAL FEATURES | INSIDE DIA HAS A 12-POINT HOLE SHAPE |
| MATT | MATERIAL | STEEL COMP 1025 OVERALL |
| MDCL | MATERIAL DOCUMENT AND CLASSIFICATION | QQ-S-633 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| SFTT | SURFACE TREATMENT | PHOSPHATE OVERALL |
| STYL | STYLE DESIGNATOR | KEY |
| Components Related to NSN - 5310-00-527-5581, 5310005275581 | ||||
| 5365-01-353-6485 (5365013536485) | 5365-01-314-0869 (5365013140869) | 5365-01-538-9415 (5365015389415) | 5330-01-360-0946 (5330013600946) | |
| 5330-01-260-4708 (5330012604708) | 5342-01-109-4185 (5342011094185) | 5331-01-608-0793 (5331016080793) | 5305-00-298-4681 (5305002984681) | |
| 5315-00-514-0217 (5315005140217) | 5330-01-528-4162 (5330015284162) | 5310-01-312-3813 (5310013123813) | 5360-00-969-4423 (5360009694423) | |
If You’re Ever Looking for NSN parts Or Have an Aircraft On Ground Situation, Don’t forget That We offer Competitive Pricing and Guaranteed On-Time Delivery.
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