The Nut,plain,hexagon, cataloged under National Stock Number 5310-01-012-3343, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Huck International, Inc. Government technical data includes 11 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-012-3343 |
| Primary Part Number | BMN5027-4-40 |
| Item Name | Nut,plain,hexagon |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Huck International, Inc |
| Status | ACTIVE |
| Width Across Flats | 0.553 INCHES MINIMUM AND 0.565 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | AMS 2411 ASSN STD SINGLE TREATMENT RESPONSE THREADS |
| Thread Series | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Precious Material | SILVER |
| Temp Rating | 900.0 FAHRENHEIT NOMINAL DEGF |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.250 INCHES IN |
| Nut Height | 0.580 INCHES MAXIMUM IN |
| Surface Treatment | SILVER THREADS |
| Thread Class | 3B |
| Thread Quantity Per Inch | 28 |
| 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 |
|---|---|
| NK1000160-4-40 | Eaton Aeroquip Llc Dba Jackson North 1 Div Fluid and Electrical Distribution (USA) |
| BMN5027-4-40 PRIMARY | Huck International, Inc (USA) |
| Reference | Meaning |
|---|---|
| BMN5027-4-40 | 5/9 Secondary reference U.S. Government activity |
NSN 5310-01-012-3343 is a Nut,plain,hexagon, manufactured by Huck International, Inc, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-012-3343 has 2 manufacturer part numbers on file: NK1000160-4-40 (Eaton Aeroquip Llc Dba Jackson North 1 Div Fluid and Electrical Distribution), BMN5027-4-40 (Huck International, Inc).
Key specifications for BMN5027-4-40: Width Across Flats: 0.553 INCHES MINIMUM AND 0.565 INCHES MAXIMUM IN; Surface Treatment Document and Classification: AMS 2411 ASSN STD SINGLE TREATMENT RESPONSE THREADS; Thread Series: UNIFIED NATIONAL JOINT FINE (UNJF); Precious Material: SILVER. 11 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.