The Nut,self-Locking,assembled Washe, cataloged under National Stock Number 5310-01-475-6869, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Sps Technologies, Llc Dba PB Fasteners. Government technical data includes 18 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-475-6869 |
| Primary Part Number | KFN512C4 |
| Item Name | Nut,self-Locking,assembled Washe |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Sps Technologies, Llc Dba PB Fasteners |
| Status | ACTIVE |
| Washer Outside Diameter | 0.460 INCHES MAXIMUM IN |
| Width Across Flats | 0.306 INCHES MINIMUM AND 0.316 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | QQ-P-416,TYPE II,CLASS 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Series | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Hardness Rating | 33.0 ROCKWELL C MINIMUM AND 44.0 ROCKWELL C MAXIMUM |
| Material Document and Classification | AMS 5732,A-286 ASSN STD 1ST MATERIAL RESPONSE OR AMS 5737,A-286 ASSN STD 2ND MATERIAL RESPONSE NUT A |
| Material Document and Classification | QQ-S-763,300 SERIES FED SPEC 1ST MATERIAL RESPONSE OR QQ-S-766,300 SERIES FED SPEC 2ND MATERIAL RESPONSE WASHER |
| Nut Counterbore Depth | 0.107 INCHES MINIMUM AND 0.117 INCHES MAXIMUM FIRST END IN |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.250 INCHES IN |
| Counterbore Diameter | 0.267 INCHES MINIMUM AND 0.272 INCHES MAXIMUM FIRST END IN |
| Locking Feature | PREVAILING TORQUE ALL METAL DESIGN |
| Surface Treatment | CADMIUM AND CHROMATE OVERALL |
| Nut Style | FLAT WITH TURNED UP EDGE |
| Thread Class | 3B |
| Thread Quantity Per Inch | 28 |
| Material | IRON ALLOY 660 NUT |
| Material | STEEL CORROSION RESISTING WASHER |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 03A136W4C | Northrop Grumman Systems Corp Dba Northrop Grumman Computing Systems (USA) |
| KFN512C4 PRIMARY | Sps Technologies, Llc Dba PB Fasteners (USA) |
| BHW136C4 PRIMARY | Bristol Industries, Llc (USA) |
| Reference | Meaning |
|---|---|
| KFN512C4 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5310-01-475-6869 is a Nut,self-Locking,assembled Washe, manufactured by Sps Technologies, Llc Dba PB Fasteners, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-475-6869 has 3 manufacturer part numbers on file: 03A136W4C (Northrop Grumman Systems Corp Dba Northrop Grumman Computing Systems), KFN512C4 (Sps Technologies, Llc Dba PB Fasteners), BHW136C4 (Bristol Industries, Llc).
Key specifications for KFN512C4: Overall Height: 0.340 INCHES MAXIMUM IN; Washer Outside Diameter: 0.460 INCHES MAXIMUM IN; Width Across Flats: 0.306 INCHES MINIMUM AND 0.316 INCHES MAXIMUM IN; Surface Treatment Document and Classification: QQ-P-416,TYPE II,CLASS 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL. 18 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.