The Nut,self-Locking,hexagon, cataloged under National Stock Number 5310-01-073-7854, 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 9 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-073-7854 |
| Primary Part Number | 49BR6542-5012 |
| Item Name | Nut,self-Locking,hexagon |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Esna, Llc |
| Status | ACTIVE |
| Width Across Flats | 4.015 INCHES NOMINAL IN |
| Thread Series | UNS |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 3.137 INCHES IN |
| Locking Feature | PREVAILING TORQUE WITH NONMETALLIC INSERT |
| Nut Height | 0.906 INCHES NOMINAL IN |
| Nut Style | HEXAGON |
| Thread Quantity Per Inch | 12 |
| Bearing Surface Type | FLAT |
| 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 |
|---|---|
| 12267734 | U S Army Tank Automotive Command Amsta-Im-Mm (USA) |
| 49BR6542-5012 PRIMARY | Esna, Llc (USA) |
| 49N7974-3.137-12 | Greer Stop Nut, Inc. (USA) |
| Reference | Meaning |
|---|---|
| 54691 | 5/2 Secondary reference U.S. Government activity |
| DAX11174 | 5/9 Secondary reference Allison Transmission Inc Dba Allison Transmission, Inc |
| 49BR6542-5012 | 5/9 Secondary reference Harvard Industries Inc |
NSN 5310-01-073-7854 is a Nut,self-Locking,hexagon, manufactured by Esna, Llc, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-073-7854 has 3 manufacturer part numbers on file: 12267734 (U S Army Tank Automotive Command Amsta-Im-Mm), 49BR6542-5012 (Esna, Llc), 49N7974-3.137-12 (Greer Stop Nut, Inc.).
3 possible matches (shared part number, not a government interchangeability claim): 2990-01-157-6317, 5136-01-662-7094, 6760-01-684-8866. Verify interchangeability with system specifications before substitution.
Key specifications for 49BR6542-5012: Width Across Flats: 4.015 INCHES NOMINAL IN; Thread Series: UNS; Thread Direction: RIGHT-HAND; Nominal Thread Size: 3.137 INCHES IN. 9 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.