The Nut,plain,round, cataloged under National Stock Number 5310-00-818-0490, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Rolls-Royce Corporation. Government technical data includes 21 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through both NSN and commercial part number lookups. 8 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-00-818-0490 |
| Primary Part Number | 6784981 |
| Item Name | Nut,plain,round |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Rolls-Royce Corporation |
| Status | ACTIVE |
| Surface Treatment Document and Classification | AMS 2481 ASSN STD SINGLE TREATMENT RESPONSE OVERALL |
| Thread Series | UN |
| Hardness Rating | 60.0 ROCKWELL C MINIMUM |
| Hole Configuration Style | CONFIGURATION F |
| Material Document and Classification | MIL-S-6758 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Features Provided | CASEHARDENED |
| Drive Point Width | 0.428 INCHES MINIMUM AND 0.448 INCHES MAXIMUM IN |
| Thread Direction | LEFT-HAND |
| Nominal Thread Size | 2.875 INCHES IN |
| Nut Diameter | 3.459 INCHES MINIMUM AND 3.479 INCHES MAXIMUM IN |
| Drive Point Depth | 0.115 INCHES MINIMUM AND 0.135 INCHES MAXIMUM IN |
| Nut Thickness | 0.415 INCHES MINIMUM AND 0.425 INCHES MAXIMUM IN |
| Drilled Hole Diameter | 0.201 INCHES NOMINAL IN |
| Surface Treatment | PHOSPHATE OVERALL |
| Countersink Angle | 119.0 DEGREES MINIMUM AND 121.0 DEGREES MAXIMUM NUT |
| Drive Point Quantity | 8 |
| Nut Style | ROUND |
| Thread Class | 3B |
| Thread Quantity Per Inch | 12 |
| Material | STEEL COMP 4130 OVERALL |
| 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 | F |
| Part Number | Manufacturer |
|---|---|
| 6784981 PRIMARY | Rolls-Royce Corporation (USA) |
| Reference | Meaning |
|---|---|
| 6784981 | 5/9 Secondary reference General Motors Corp |
| 6784981 | 5/9 Secondary reference Allison Transmission Inc Dba Allison Transmission, Inc |
| 6784981 | 5/9 Secondary reference Alamo Aircraft, Ltd. |
| 6784981 | 5/9 Secondary reference Shackelford Machining Inc |
| 6784981 | 5/9 Secondary reference Md3 Industries, Limited Div Md3 Industries, Ltd. |
| 6784981 | 5/9 Secondary reference Pacific Sky Supply, Inc. Dba Pacific Sky Supply Inc |
| 6784981 | 5/9 Secondary reference Adk Machine Inc |
| 6784981 | 5/9 Secondary reference Preci-Manufacturing, Incorporated |
NSN 5310-00-818-0490 is a Nut,plain,round, manufactured by Rolls-Royce Corporation, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-818-0490 has 1 manufacturer part number on file: 6784981 (Rolls-Royce Corporation).
Key specifications for 6784981: Surface Treatment Document and Classification: AMS 2481 ASSN STD SINGLE TREATMENT RESPONSE OVERALL; Thread Series: UN; Hardness Rating: 60.0 ROCKWELL C MINIMUM; Hole Configuration Style: CONFIGURATION F. 21 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.