The Nut,self-Locking,extended Washer, cataloged under National Stock Number 5310-00-989-5076, 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 11 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-00-989-5076 |
| Primary Part Number | 59632-428 |
| 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 | 0.470 INCHES MINIMUM AND 0.480 INCHES MAXIMUM IN |
| Width Across Flats | 0.307 INCHES MINIMUM AND 0.312 INCHES MAXIMUM IN |
| Thread Series | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Washer Thickness | 0.044 INCHES MINIMUM AND 0.064 INCHES MAXIMUM IN |
| Material Document and Classification | AMS 5642 ASSN STD ALL MATERIAL RESPONSES OVERALL |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.250 INCHES IN |
| Locking Feature | PREVAILING TORQUE ALL METAL DESIGN |
| Surface Treatment | PASSIVATE OVERALL |
| Thread Class | 3BG |
| Thread Quantity Per Inch | 28 |
| 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 |
|---|---|
| 490157 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| 490157 | Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney (USA) |
| 59632-428 PRIMARY | Sps Technologies, Llc Dba PB Fasteners (USA) |
| 490 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| Reference | Meaning |
|---|---|
| 490157 | 5/9 Secondary reference Turbo Power & Marine System Inc Sub of United Technologies Corp |
| 490157 | 5/9 Secondary reference Now Corp Modern Mfg Div |
NSN 5310-00-989-5076 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 5310-00-989-5076 has 4 manufacturer part numbers on file: 490157 (Sps Technologies, Llc Dba PB Fasteners), 490157 (Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney), 59632-428 (Sps Technologies, Llc Dba PB Fasteners), 490 (Sps Technologies, Llc Dba PB Fasteners).
Key specifications for 59632-428: Overall Height: 0.262 INCHES MINIMUM AND 0.280 INCHES MAXIMUM IN; Washer Outside Diameter: 0.470 INCHES MINIMUM AND 0.480 INCHES MAXIMUM IN; Width Across Flats: 0.307 INCHES MINIMUM AND 0.312 INCHES MAXIMUM IN; Thread Series: UNIFIED NATIONAL JOINT FINE (UNJF). 11 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.