The Nut,plain,round, cataloged under National Stock Number 5310-00-488-4401, 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. Government technical data includes 6 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-00-488-4401 |
| Primary Part Number | 655764 |
| Item Name | Nut,plain,round |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney |
| Status | ACTIVE |
| Thread Series | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Nominal Thread Size | 0.438 INCHES IN |
| Nut Diameter | 0.760 INCHES NOMINAL IN |
| Nut Style | ROUND |
| Thread Class | 3B |
| Thread Quantity Per Inch | 20 |
| 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 |
|---|---|
| 655764 PRIMARY | Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney (USA) |
| 655764 | Enjet Aero Bloomfield, Llc (USA) |
| 655764 | Preci-Manufacturing, Incorporated (USA) |
| Reference | Meaning |
|---|---|
| 655764 | 5/9 Secondary reference Sps Technologies, Llc Dba PB Fasteners |
| 655764 | 5/2 Secondary reference U.S. Government activity |
| 655764 | 5/9 Secondary reference Turbo Power & Marine System Inc Sub of United Technologies Corp |
| 655764 | 5/9 Secondary reference Royal Oak Gage, Inc |
| 655764 | 5/9 Secondary reference Accurate Threaded Products Company the |
| 655764 | 5/2 Secondary reference U.S. Government activity |
NSN 5310-00-488-4401 is a Nut,plain,round, manufactured by Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-488-4401 has 3 manufacturer part numbers on file: 655764 (Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney), 655764 (Enjet Aero Bloomfield, Llc), 655764 (Preci-Manufacturing, Incorporated).
Key specifications for 655764: Thread Series: UNIFIED NATIONAL JOINT FINE (UNJF); Nominal Thread Size: 0.438 INCHES IN; Nut Diameter: 0.760 INCHES NOMINAL IN; Nut Style: ROUND. 6 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.