The Nut,self-Locking,extended Washer, cataloged under National Stock Number 5310-01-155-6760, 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 14 specifications, cited from the U.S. Government catalog. The record lists 10 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5310-01-155-6760 |
| Primary Part Number | 80800-428 |
| 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 | 0.550 INCHES MINIMUM AND 0.560 INCHES MAXIMUM IN |
| Width Across Flats | 0.367 INCHES MINIMUM AND 0.378 INCHES MAXIMUM IN |
| Thread Series | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Washer Thickness | 0.040 INCHES NOMINAL IN |
| Material Document and Classification | AMS5525 ASSN STD SINGLE MATERIAL RESPONSE OR AMS5732 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nut Counterbore Depth | 0.020 INCHES MINIMUM AND 0.030 INCHES MAXIMUM LOCKING INSERT IN |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.250 INCHES IN |
| Counterbore Diameter | 0.270 INCHES MINIMUM AND 0.280 INCHES MAXIMUM LOCKING INSERT IN |
| Locking Feature | FREE-RUNNING ALL METAL DESIGN |
| Nut Style | HEXAGON |
| Thread Class | 3B |
| Thread Quantity Per Inch | 28 |
| Material | STEEL CORROSION RESISTING 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 |
|---|---|
| 80800-428 PRIMARY | Sps Technologies, Llc Dba PB Fasteners (USA) |
| 4057795 | Alamo Aircraft, Ltd. (USA) |
| 4057832 PRIMARY | Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney (USA) |
| 4057828 | Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney (USA) |
| 4057831 PRIMARY | Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney (USA) |
| H51692-4 PRIMARY | Howmet Global Fastening Systems Inc (USA) |
| 4057828 PRIMARY | Rtx Corporation Div Pratt & Whitney (USA) |
| 4057795 | Bristol Industries, Llc (USA) |
| 4057795 | Esna, Llc (USA) |
| 4057795 | Rtx Corporation Div Pratt & Whitney (USA) |
| Reference | Meaning |
|---|---|
| 4057795 | D/9 Drawing number reference only Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney |
| 5310PL1921970 | 6/9 Informative reference only Jednolity Indeks Materialowy - Uniform Material Index |
| 5310PL0751350 | 6/9 Informative reference only Jednolity Indeks Materialowy - Uniform Material Index |
NSN 5310-01-155-6760 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 5310-01-155-6760 has 10 manufacturer part numbers on file: 80800-428 (Sps Technologies, Llc Dba PB Fasteners), 4057795 (Alamo Aircraft, Ltd.), 4057832 (Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney), 4057828 (Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney), 4057831 (Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney) and 5 more.
Key specifications for 80800-428: Overall Height: 0.290 INCHES NOMINAL IN; Washer Outside Diameter: 0.550 INCHES MINIMUM AND 0.560 INCHES MAXIMUM IN; Width Across Flats: 0.367 INCHES MINIMUM AND 0.378 INCHES MAXIMUM IN; Thread Series: UNIFIED NATIONAL JOINT FINE (UNJF). 14 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.