The Nut,self-Locking,extended Washer, cataloged under National Stock Number 5310-01-393-7101, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Howmet Global Fastening Systems Inc. Government technical data includes 17 specifications, cited from the U.S. Government catalog. The record lists 5 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5310-01-393-7101 |
| Primary Part Number | KFN669-08 |
| Item Name | Nut,self-Locking,extended Washer |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Howmet Global Fastening Systems Inc |
| Status | ACTIVE |
| Lubrication | DRY FILM LUBRICANT |
| Washer Outside Diameter | 0.273 INCHES NOMINAL IN |
| Width Across Flats | 0.212 INCHES MINIMUM AND 0.220 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Series | UNJC |
| Washer Thickness | 0.102 INCHES MINIMUM AND 0.112 INCHES MAXIMUM IN |
| Material Document and Classification | AMS 5639 ASSN STD SINGLE MATERIAL RESPONSE OR AMS 5697 ASSN STD SINGLE MATERIAL RESPONSE OR AMS 5686 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nut Counterbore Depth | 0.102 INCHES MINIMUM AND 0.112 INCHES MAXIMUM FIRST END IN |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.164 INCHES IN |
| Counterbore Diameter | 0.198 INCHES MINIMUM AND 0.202 INCHES MAXIMUM FIRST END IN |
| Locking Feature | PREVAILING TORQUE ALL METAL DESIGN |
| Surface Treatment | PASSIVATE OVERALL |
| Nut Style | HEXAGON |
| Thread Class | 3B |
| Thread Quantity Per Inch | 32 |
| Material | STEEL COMP 304 OR STEEL COMP 305 OVERALL |
| 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 |
|---|---|
| KFN669-08 PRIMARY | Howmet Global Fastening Systems Inc (USA) |
| KFN669-08 PRIMARY | Howmet Global Fastening Systems Inc Div City of Industry Operations (USA) |
| KFN669-08 PRIMARY | Sps Technologies, Llc Dba PB Fasteners (USA) |
| BH00528-08 PRIMARY | Bristol Industries, Llc (USA) |
| KFN669-08 PRIMARY | Huck International, Inc (USA) |
| Reference | Meaning |
|---|---|
| LE114-0032-0002 | 7/2 Vendor item drawing reference The Boeing Company Div Legacy Am&m |
NSN 5310-01-393-7101 is a Nut,self-Locking,extended Washer, manufactured by Howmet Global Fastening Systems Inc, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-393-7101 has 5 manufacturer part numbers on file: KFN669-08 (Howmet Global Fastening Systems Inc), KFN669-08 (Howmet Global Fastening Systems Inc Div City of Industry Operations), KFN669-08 (Sps Technologies, Llc Dba PB Fasteners), BH00528-08 (Bristol Industries, Llc), KFN669-08 (Huck International, Inc).
Key specifications for KFN669-08: Lubrication: DRY FILM LUBRICANT; Overall Height: 0.270 INCHES NOMINAL IN; Washer Outside Diameter: 0.273 INCHES NOMINAL IN; Width Across Flats: 0.212 INCHES MINIMUM AND 0.220 INCHES MAXIMUM IN. 17 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.