The Nut,plain,extended Washer,double, cataloged under National Stock Number 5310-01-673-3413, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney. The record lists 5 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Item Name | Nut,plain,extended Washer,double |
| FSC / FSG | 5310 — Nuts and Washers (FSG 53) |
| Manufacturers | Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney (CAGE 77445); Howmet Global Fastening Systems Inc (CAGE 15653); Sps Technologies, Llc Dba PB Fasteners (CAGE 56878) |
| Parameter | Value |
|---|---|
| NSN | 5310-01-673-3413 |
| Primary Part Number | 57T387 |
| Item Name | Nut,plain,extended Washer,double |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney |
| Status | ACTIVE |
| 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 |
|---|---|
| 57T387 PRIMARY | Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney (USA) |
| 51U792 PRIMARY | Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney (USA) |
| 51U791 | Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney (USA) |
| H54973-5 PRIMARY | Howmet Global Fastening Systems Inc (USA) |
| 93340-524 PRIMARY | Sps Technologies, Llc Dba PB Fasteners (USA) |
NSN 5310-01-673-3413 is a Nut,plain,extended Washer,double, manufactured by Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-673-3413 has 5 manufacturer part numbers on file: 57T387 (Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney), 51U792 (Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney), 51U791 (Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney), H54973-5 (Howmet Global Fastening Systems Inc), 93340-524 (Sps Technologies, Llc Dba PB Fasteners).
1 possible match (shared part number, not a government interchangeability claim): 5310-01-687-6853. Verify interchangeability with system specifications before substitution.
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.