The Nut,self-Locking, cataloged under National Stock Number 5310-01-071-3540, 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 1 specification, cited from the U.S. Government catalog. The record lists 1 manufacturer part number 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5310-01-071-3540 |
| Primary Part Number | KFN631-08 |
| Item Name | Nut,self-Locking |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Howmet Global Fastening Systems Inc |
| Status | ACTIVE |
| General Characteristics Item Description | 0.164-32 UNJC 3B RH THREAD,NUT-ALUMINUM ALLOY 7075-T73,ANODIZED PER MIL-A-8625,TY 2 CLASS 2 WITH YELLOW DIE,SEAL-POLYTETRAFLUOROETHYLENE PER MIL-R-19468,DRY FILM LUBRICATED,0.313 IN. MAX OUTSIDE DIA,0.271 IN. MIN AND 0.291 IN. MAX OVERALL HEIGHT,0.225 IN. MIN AND 0.231 IN. MAX DIA OF NUT,0.186 IN. MIN AND 0.189 IN. MAX DIA OF SEAL,PREVAILING TORQUE ALL METAL DESIGN LOCKING FEATURE,9.04 INCH POUNDS MAX LOCKING TORQUE,1530.0 PSI MIN TENSILE STRENGTH,250 D50 DEG F TEMP RATING IN |
| 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 |
|---|---|
| KFN631-08 PRIMARY | Howmet Global Fastening Systems Inc (USA) |
| Reference | Meaning |
|---|---|
| KFN631-08 | 5/9 Secondary reference Howmet Global Fastening Systems Inc. Div Microdot Products |
NSN 5310-01-071-3540 is a Nut,self-Locking, manufactured by Howmet Global Fastening Systems Inc, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-071-3540 has 1 manufacturer part number on file: KFN631-08 (Howmet Global Fastening Systems Inc).
Key specifications for KFN631-08: General Characteristics Item Description: 0.164-32 UNJC 3B RH THREAD,NUT-ALUMINUM ALLOY 7075-T73,ANODIZED PER MIL-A-8625,TY 2 CLASS 2 WITH YELLOW DIE,SEAL-POLYTETRAFLUOROETHYLENE PER MIL-R-19468,DRY FILM LUBRICATED,0.313 IN. MAX OUTSIDE DIA,0.271 IN. MIN AND 0.291 IN. MAX OVERALL HEIGHT,0.225 IN. MIN AND 0.231 IN. MAX DIA OF NUT,0.186 IN. MIN AND 0.189 IN. MAX DIA OF SEAL,PREVAILING TORQUE ALL METAL DESIGN LOCKING FEATURE,9.04 INCH POUNDS MAX LOCKING TORQUE,1530.0 PSI MIN TENSILE STRENGTH,250 D50 DEG F TEMP RATING IN. 1 specification is 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.