The Nut,plain,round, cataloged under National Stock Number 5310-01-104-4551, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Dumore 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-104-4551 |
| Primary Part Number | 645-0339 |
| Item Name | Nut,plain,round |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Dumore Corporation |
| Status | ACTIVE |
| Width Across Flats | 0.748 INCHES MINIMUM AND 0.752 INCHES MAXIMUM IN |
| Thread Series | UNF |
| Hole Configuration Style | CONFIGURATION G |
| Material Document and Classification | RM-054-5056,FSCM 18797 MFR REF SINGLE MATERIAL RESPONSE OVERALL |
| Thread Direction | LEFT-HAND |
| Nominal Thread Size | 0.500 INCHES IN |
| Nut Diameter | 0.860 INCHES NOMINAL IN |
| Nut Thickness | 0.247 INCHES MINIMUM AND 0.253 INCHES MAXIMUM IN |
| Surface Treatment | OXIDE OVERALL |
| Nut Style | ROUND |
| Thread Class | 2B |
| Hole Nominal Thread Diameter | 0.500 INCHES IN |
| Thread Quantity Per Inch | 20 |
| Material | STEEL OVERALL |
| Hole Type and Quantity | 1 TAPPED |
| 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 |
|---|---|
| 645-0339 PRIMARY | Dumore Corporation (USA) |
NSN 5310-01-104-4551 is a Nut,plain,round, manufactured by Dumore Corporation, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-104-4551 has 1 manufacturer part number on file: 645-0339 (Dumore Corporation).
Key specifications for 645-0339: Width Across Flats: 0.748 INCHES MINIMUM AND 0.752 INCHES MAXIMUM IN; Thread Series: UNF; Hole Configuration Style: CONFIGURATION G; Material Document and Classification: RM-054-5056,FSCM 18797 MFR REF SINGLE MATERIAL RESPONSE OVERALL. 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.