The Nut,plain,round, cataloged under National Stock Number 5310-01-057-4865, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Meggitt Safety Systems Inc. Government technical data includes 15 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-057-4865 |
| Primary Part Number | R8441 |
| Item Name | Nut,plain,round |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Meggitt Safety Systems Inc |
| Status | ACTIVE |
| Surface Treatment Document and Classification | MIL-A-8625 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Series | UNEF |
| Material Document and Classification | WW-T-785 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 1.250 INCHES IN |
| Nut Diameter | 1.375 INCHES NOMINAL IN |
| Drive Point Depth | 0.060 INCHES NOMINAL IN |
| Nut Thickness | 0.250 INCHES NOMINAL IN |
| Surface Treatment | ANODIZE OVERALL |
| Countersink Angle | 110.0 DEGREES NOMINAL NUT |
| Drive Point Quantity | 4 |
| Nut Style | ROUND |
| Thread Class | 3B |
| Thread Quantity Per Inch | 18 |
| Material | ALUMINUM ALLOY 2024 OVERALL |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
NSN 5310-01-057-4865 is a Nut,plain,round, manufactured by Meggitt Safety Systems Inc, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-057-4865 has 3 manufacturer part numbers on file: R8441 (Meggitt Safety Systems Inc), R8441 (Meggitt Safety Systems, Inc. Dba Meggitt Control Systems-Ventura County), R8441 (Meggitt Safety Systems Inc).
Key specifications for R8441: Surface Treatment Document and Classification: MIL-A-8625 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL; Thread Series: UNEF; Material Document and Classification: WW-T-785 FED SPEC SINGLE MATERIAL RESPONSE OVERALL; Thread Direction: RIGHT-HAND. 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.