The Nut,self-Locking, cataloged under National Stock Number 5310-01-065-6971, 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5310-01-065-6971 |
| Primary Part Number | KFN631-3 |
| Item Name | Nut,self-Locking |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Howmet Global Fastening Systems Inc |
| Status | ACTIVE |
| General Characteristics Item Description | 0.190-32 UNJF-3B RH THREAD,NUT ALUMINUM ALLOY 7075 TEMPER T73,SEAL PLASTIC MIL-P-19468,NUT ANODIZED MIL-A-8625 TYPE 2 CLASS 2,SOLUBLE LUBRICANT,0.348 IN. MAX WASHER OUTSIDE DIA,0.260 IN.MAX HEIGHT OF NUT,0.102 IN. MIN AND 0.112 IN. MAX COUNTERBORE DEPTH,0.203 IN. MAX COUNTERBORE DIA,PREVAILING TORQUE ALL METAL LOCKING FEATURE,SPLINE TYPE WRENCHING FEATURE,250 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 |
|---|---|
| KFN631-3 PRIMARY | Howmet Global Fastening Systems Inc (USA) |
| Reference | Meaning |
|---|---|
| KFN631-3 | 5/9 Secondary reference Howmet Global Fastening Systems Inc. Div Microdot Products |
NSN 5310-01-065-6971 is a Nut,self-Locking, manufactured by Howmet Global Fastening Systems Inc, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-065-6971 has 1 manufacturer part number on file: KFN631-3 (Howmet Global Fastening Systems Inc).
Key specifications for KFN631-3: General Characteristics Item Description: 0.190-32 UNJF-3B RH THREAD,NUT ALUMINUM ALLOY 7075 TEMPER T73,SEAL PLASTIC MIL-P-19468,NUT ANODIZED MIL-A-8625 TYPE 2 CLASS 2,SOLUBLE LUBRICANT,0.348 IN. MAX WASHER OUTSIDE DIA,0.260 IN.MAX HEIGHT OF NUT,0.102 IN. MIN AND 0.112 IN. MAX COUNTERBORE DEPTH,0.203 IN. MAX COUNTERBORE DIA,PREVAILING TORQUE ALL METAL LOCKING FEATURE,SPLINE TYPE WRENCHING FEATURE,250 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.