The Nut,plain,octagon, cataloged under National Stock Number 5310-00-421-7763, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Northrop Grumman Systems Corporation. Government technical data includes 15 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-00-421-7763 |
| Primary Part Number | 1128HM40088-11 |
| Item Name | Nut,plain,octagon |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Northrop Grumman Systems Corporation |
| Status | ACTIVE |
| Width Across Flats | 1.187 INCHES NOMINAL IN |
| Bearing Surface Finish | 125.0 MICROINCHES |
| Thread Series | UNEF |
| Hole Configuration Style | CONFIGURATION A |
| Nut Counterbore Depth | 0.166 INCHES MINIMUM AND 0.176 INCHES MAXIMUM NUT IN |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 1.000 INCHES IN |
| Counterbore Diameter | 1.057 INCHES MINIMUM AND 1.067 INCHES MAXIMUM NUT IN |
| Nut Height | 0.463 INCHES MINIMUM AND 0.468 INCHES MAXIMUM IN |
| Drilled Hole Diameter | 0.048 INCHES NOMINAL IN |
| Nut Style | PLAIN, OCTAGON |
| Thread Class | 3B |
| Thread Quantity Per Inch | 20 |
| Bearing Surface Type | WASHER FACED |
| Hole Type and Quantity | 8 DRILLED |
| 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 |
|---|---|
| 1128HM40088-11 PRIMARY | Northrop Grumman Systems Corporation (USA) |
| Reference | Meaning |
|---|---|
| 1128HM40088-11 | 5/9 Secondary reference Northrop Grumman Systems Corporation |
NSN 5310-00-421-7763 is a Nut,plain,octagon, manufactured by Northrop Grumman Systems Corporation, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-421-7763 has 1 manufacturer part number on file: 1128HM40088-11 (Northrop Grumman Systems Corporation).
Key specifications for 1128HM40088-11: Width Across Flats: 1.187 INCHES NOMINAL IN; Bearing Surface Finish: 125.0 MICROINCHES; Thread Series: UNEF; Hole Configuration Style: CONFIGURATION A. 15 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.