The Nut,plain,hexagon, cataloged under National Stock Number 5310-01-386-3494, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Long-Lok Llc. Government technical data includes 14 specifications, cited from the U.S. Government catalog. The record lists 4 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5310-01-386-3494 |
| Primary Part Number | T-1156-20C |
| Item Name | Nut,plain,hexagon |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Long-Lok Llc |
| Status | ACTIVE |
| Width Across Flats | 1.728 INCHES MINIMUM AND 1.752 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Series | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Temp Rating | 250.0 FAHRENHEIT MAXIMUM DEGF |
| Material Document and Classification | AMS 5525 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 1.250 INCHES IN |
| Nut Height | 0.553 INCHES MINIMUM AND 0.573 INCHES MAXIMUM IN |
| Surface Treatment | PASSIVATE OVERALL |
| Nut Style | HEXAGON |
| Thread Class | 3B |
| Thread Quantity Per Inch | 12 |
| Material | IRON ALLOY 660 OVERALL |
| Bearing Surface Type | CHAMFERED OR WASHER FACED |
| 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 |
|---|---|
| T-1156-20C | Long-Lok, Llc (USA) |
| T-1156-20C PRIMARY | Long-Lok Llc (USA) |
| H52826-20 | Howmet Global Fastening Systems Inc (USA) |
| 03A251-20C | Northrop Grumman Systems Corp Dba Northrop Grumman Computing Systems (USA) |
| Reference | Meaning |
|---|---|
| AD03A251-20C | 5/2 Secondary reference U.S. Government activity |
NSN 5310-01-386-3494 is a Nut,plain,hexagon, manufactured by Long-Lok Llc, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-386-3494 has 4 manufacturer part numbers on file: T-1156-20C (Long-Lok, Llc), T-1156-20C (Long-Lok Llc), H52826-20 (Howmet Global Fastening Systems Inc), 03A251-20C (Northrop Grumman Systems Corp Dba Northrop Grumman Computing Systems).
Key specifications for T-1156-20C: Width Across Flats: 1.728 INCHES MINIMUM AND 1.752 INCHES MAXIMUM IN; Surface Treatment Document and Classification: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL; Thread Series: UNIFIED NATIONAL JOINT FINE (UNJF); Temp Rating: 250.0 FAHRENHEIT MAXIMUM DEGF. 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.