The Nut,plain,knurled, cataloged under National Stock Number 5310-00-796-4786, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier. Government technical data includes 14 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5310-00-796-4786 |
| Primary Part Number | 4F81B1 |
| Item Name | Nut,plain,knurled |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier |
| Status | ACTIVE |
| Thread Series | UNIFIED NATIONAL COARSE (UNC) |
| Material Document and Classification | QQ-B-626 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Nut Counterbore Depth | 0.016 INCHES NOMINAL NUT IN |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.250 INCHES IN |
| Nut Diameter | 0.625 INCHES NOMINAL IN |
| Counterbore Diameter | 0.375 INCHES NOMINAL NUT IN |
| Nut Thickness | 0.375 INCHES NOMINAL IN |
| Countersink Angle | 45.0 DEGREES NOMINAL NUT |
| Nut Style | KNURLED |
| Thread Class | 2B |
| Thread Quantity Per Inch | 20 |
| Material | COPPER ALLOY OVERALL |
| Knurl Width | 0.156 INCHES NOMINAL IN |
| 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 |
|---|---|
| 4F81B1 PRIMARY | Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier (USA) |
| Reference | Meaning |
|---|---|
| 64A98B780-1 | 5/9 Secondary reference U.S. Government activity |
| 4F81B1 | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
| 64A98B780-1 | 5/9 Secondary reference Gse Production and Support Llc Dba Gse Spares |
NSN 5310-00-796-4786 is a Nut,plain,knurled, manufactured by Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-796-4786 has 1 manufacturer part number on file: 4F81B1 (Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier).
Key specifications for 4F81B1: Thread Series: UNIFIED NATIONAL COARSE (UNC); Material Document and Classification: QQ-B-626 FED SPEC SINGLE MATERIAL RESPONSE OVERALL; Nut Counterbore Depth: 0.016 INCHES NOMINAL NUT IN; Thread Direction: RIGHT-HAND. 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.