The Nut,plain,hexagon, cataloged under National Stock Number 5310-00-677-3771, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Telemechanics Inc. Government technical data includes 13 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-00-677-3771 |
| Primary Part Number | 156399 |
| Item Name | Nut,plain,hexagon |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Telemechanics Inc |
| Status | ACTIVE |
| Width Across Flats | 0.501 INCHES NOMINAL IN |
| Thread Series | UNEF |
| Hole Configuration Style | CONFIGURATION B |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.375 INCHES IN |
| Nut Height | 0.145 INCHES NOMINAL IN |
| Drilled Hole Diameter | 0.037 INCHES NOMINAL IN |
| Nut Style | HEXAGON |
| Thread Class | 2B |
| Thread Quantity Per Inch | 32 |
| Material | STEEL CORROSION RESISTING OVERALL |
| Bearing Surface Type | CHAMFERED |
| Hole Type and Quantity | 2 DRILLED |
| 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 |
|---|---|
| 156399 PRIMARY | Telemechanics Inc (USA) |
| Reference | Meaning |
|---|---|
| 156399 | C/1 Advisory reference — outside the item-of-supply concept Zf Industrieantriebe Witten Gmbh |
| 156399 | 5/9 Secondary reference At and T Corp |
NSN 5310-00-677-3771 is a Nut,plain,hexagon, manufactured by Telemechanics Inc, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-677-3771 has 1 manufacturer part number on file: 156399 (Telemechanics Inc).
1 possible match (shared part number, not a government interchangeability claim): 5310-01-602-5381. Verify interchangeability with system specifications before substitution.
Key specifications for 156399: Width Across Flats: 0.501 INCHES NOMINAL IN; Thread Series: UNEF; Hole Configuration Style: CONFIGURATION B; Thread Direction: RIGHT-HAND. 13 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.