The Nut,plain,hexagon, cataloged under National Stock Number 5310-00-545-8314, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Ag Communication Systems Corp. Government technical data includes 12 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-00-545-8314 |
| Primary Part Number | D77128A |
| Item Name | Nut,plain,hexagon |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Ag Communication Systems Corp |
| Status | ACTIVE |
| Width Across Flats | 0.562 INCHES NOMINAL IN |
| Surface Treatment Document and Classification | 637A FSCM 88671 MFR REF SINGLE TREATMENT RESPONSE OVERALL A |
| Thread Series | UNIFIED NATIONAL COARSE (UNC) |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.375 INCHES IN |
| Nut Height | 0.406 INCHES NOMINAL IN |
| Surface Treatment | ZINC OVERALL |
| Nut Style | HEXAGON |
| Thread Class | 2B |
| Thread Quantity Per Inch | 16 |
| Material | STEEL OVERALL |
| Bearing Surface Type | CHAMFERED |
| 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 |
|---|---|
| D77128A PRIMARY | Ag Communication Systems Corp (USA) |
| Reference | Meaning |
|---|---|
| D77128A | 5/9 Secondary reference U.S. Government activity |
NSN 5310-00-545-8314 is a Nut,plain,hexagon, manufactured by Ag Communication Systems Corp, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-545-8314 has 1 manufacturer part number on file: D77128A (Ag Communication Systems Corp).
Key specifications for D77128A: Width Across Flats: 0.562 INCHES NOMINAL IN; Surface Treatment Document and Classification: 637A FSCM 88671 MFR REF SINGLE TREATMENT RESPONSE OVERALL A; Thread Series: UNIFIED NATIONAL COARSE (UNC); Thread Direction: RIGHT-HAND. 12 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.