The Nut,self-Locking,extended Washer, cataloged under National Stock Number 5310-00-941-0178, 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 16 specifications, cited from the U.S. Government catalog. The record lists 4 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-00-941-0178 |
| Primary Part Number | 489162 |
| Item Name | Nut,self-Locking,extended Washer |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Sps Technologies, Llc Dba PB Fasteners |
| Status | ACTIVE |
| Washer Outside Diameter | 0.345 INCHES MAXIMUM IN |
| Width Across Flats | 0.243 INCHES MINIMUM AND 0.252 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | AMS 2400 ASSN STD SINGLE TREATMENT RESPONSE OVERALL |
| Thread Series | UNF |
| Hardness Rating | 39.0 ROCKWELL C MINIMUM AND 46.0 ROCKWELL C MAXIMUM |
| Washer Thickness | 0.047 INCHES MINIMUM AND 0.057 INCHES MAXIMUM IN |
| Material Document and Classification | AMS 6322 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.190 INCHES IN |
| Locking Feature | PREVAILING TORQUE ALL METAL DESIGN |
| Surface Treatment | CADMIUM OVERALL |
| Countersink Angle | 85.0 DEGREES MINIMUM AND 95.0 DEGREES MAXIMUM NUT |
| Nut Style | DOUBLE HEXAGON |
| Thread Class | 3B |
| Thread Quantity Per Inch | 32 |
| Material | STEEL COMP 8740 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 |
|---|---|
| IC489227 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| 489162 | Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney (USA) |
| IC489227 | Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney (USA) |
| 489162 PRIMARY | Sps Technologies, Llc Dba PB Fasteners (USA) |
| Reference | Meaning |
|---|---|
| DLH6625-02 | 5/9 Secondary reference Harvard Industries Inc |
| 489162 | 5/9 Secondary reference Howmet Global Fastening Systems Inc |
| RMLH6225-02 | 5/9 Secondary reference Harvard Industries Inc |
NSN 5310-00-941-0178 is a Nut,self-Locking,extended Washer, manufactured by Sps Technologies, Llc Dba PB Fasteners, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-941-0178 has 4 manufacturer part numbers on file: IC489227 (Sps Technologies, Llc Dba PB Fasteners), 489162 (Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney), IC489227 (Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney), 489162 (Sps Technologies, Llc Dba PB Fasteners).
Key specifications for 489162: Overall Height: 0.235 INCHES MINIMUM AND 0.250 INCHES MAXIMUM IN; Washer Outside Diameter: 0.345 INCHES MAXIMUM IN; Width Across Flats: 0.243 INCHES MINIMUM AND 0.252 INCHES MAXIMUM IN; Surface Treatment Document and Classification: AMS 2400 ASSN STD SINGLE TREATMENT RESPONSE OVERALL. 16 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.