The Nut,self-Locking,hexagon, cataloged under National Stock Number 5310-00-625-9987, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Esna, Llc. Government technical data includes 14 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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.
| Item Name | Nut,self-Locking,hexagon |
| FSC / FSG | 5310 — Nuts and Washers (FSG 53) |
| Manufacturers | Esna, Llc (CAGE 019L2) |
| Parameter | Value |
|---|---|
| NSN | 5310-00-625-9987 |
| Primary Part Number | 42NTU2812 |
| Item Name | Nut,self-Locking,hexagon |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Esna, Llc |
| Status | ACTIVE |
| Width Across Flats | 2.715 INCHES MINIMUM AND 2.762 INCHES MAXIMUM IN |
| Thread Series | UN |
| Temp Rating | 250.0 FAHRENHEIT NOMINAL DEGF |
| Material Document and Classification | AISI ASSN STD SINGLE MATERIAL RESPONSE NUT |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 2.000 INCHES IN |
| Locking Feature | PREVAILING TORQUE WITH NONMETALLIC INSERT |
| Nut Height | 1.406 INCHES MINIMUM AND 1.532 INCHES MAXIMUM IN |
| Surface Treatment | CADMIUM NUT |
| Nut Style | HEXAGON |
| Thread Class | 3B |
| Thread Quantity Per Inch | 12 |
| Material | STEEL COMP 1117 NUT |
| Material | PLASTIC POLYAMIDE NYLON LOCKING INSERT |
| 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 |
|---|---|
| 42NTU2812 PRIMARY | Esna, Llc (USA) |
| Reference | Meaning |
|---|---|
| 42NTU2812 | 5/9 Secondary reference Harvard Industries Inc |
NSN 5310-00-625-9987 is a Nut,self-Locking,hexagon, manufactured by Esna, Llc, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-625-9987 has 1 manufacturer part number on file: 42NTU2812 (Esna, Llc).
Key specifications for 42NTU2812: Width Across Flats: 2.715 INCHES MINIMUM AND 2.762 INCHES MAXIMUM IN; Thread Series: UN; Temp Rating: 250.0 FAHRENHEIT NOMINAL DEGF; Material Document and Classification: AISI ASSN STD SINGLE MATERIAL RESPONSE NUT. 14 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.