The Nut,plain,hexagon, cataloged under National Stock Number 5310-01-588-8261, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Phillips Research Corp Dba Sea Systems Division Div Sea Systems Division of Phillips Research Corp.. Government technical data includes 9 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-588-8261 |
| Primary Part Number | 505029-006A |
| Item Name | Nut,plain,hexagon |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Phillips Research Corp Dba Sea Systems Division Div Sea Systems Division of Phillips Research Corp. |
| Status | ACTIVE |
| Width Across Flats | 1.250 INCHES NOMINAL IN |
| Thread Series | NEF |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.750 INCHES IN |
| Nut Height | 0.250 INCHES NOMINAL IN |
| Surface Treatment | PASSIVATE OVERALL |
| Nut Style | HEXAGON |
| Thread Quantity Per Inch | 20 |
| Material | STEEL COMP 303 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 |
|---|---|
| 505029-006A PRIMARY | Phillips Research Corp Dba Sea Systems Division Div Sea Systems Division of Phillips Research Corp. (USA) |
| Reference | Meaning |
|---|---|
| 505029-000 NUT | 5/9 Secondary reference Phillips Research Corp |
| 505029-000 NUT | C/1 Advisory reference — outside the item-of-supply concept Phillips Research Corp Dba Sea Systems Division Div Sea Systems Division of Phillips Research Corp. |
| 0.750-20NEF-2B 1.25HX.25TK | 5/1 Secondary reference Phillips Research Corp |
NSN 5310-01-588-8261 is a Nut,plain,hexagon, manufactured by Phillips Research Corp Dba Sea Systems Division Div Sea Systems Division of Phillips Research Corp., classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-588-8261 has 1 manufacturer part number on file: 505029-006A (Phillips Research Corp Dba Sea Systems Division Div Sea Systems Division of Phillips Research Corp.).
Key specifications for 505029-006A: Width Across Flats: 1.250 INCHES NOMINAL IN; Thread Series: NEF; Thread Direction: RIGHT-HAND; Nominal Thread Size: 0.750 INCHES IN. 9 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.