The Nut,self-Locking,gang Channel, cataloged under National Stock Number 5310-01-156-6426, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is The Boeing Company Div Defense. Government technical data includes 19 specifications, cited from the U.S. Government catalog. The record lists 2 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-156-6426 |
| Primary Part Number | ST3M445C6M2 |
| Item Name | Nut,self-Locking,gang Channel |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Lubrication | DRY FILM LUBRICANT |
| Nut Length | 0.780 INCHES MINIMUM AND 0.790 INCHES MAXIMUM IN |
| Thread Series | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Material Document and Classification | AMS 5525 ASSN STD SINGLE MATERIAL RESPONSE OR AMS 5732 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nut Counterbore Depth | 0.100 INCHES MINIMUM BASE IN |
| Features Provided | FLOATING NUT |
| Base Width | 0.555 INCHES MINIMUM AND 0.565 INCHES MAXIMUM IN |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.375 INCHES IN |
| Specification/standard Data | 76301-ST3-445 MANUFACTURERS STANDARD |
| Counterbore Diameter | 0.379 INCHES MINIMUM BASE IN |
| Locking Feature | PREVAILING TORQUE ALL METAL DESIGN |
| Nut Height | 0.370 INCHES MAXIMUM IN |
| Surface Treatment | NICKEL OR COPPER OR NICKEL AND COPPER OVERALL |
| Nut Style | GANG CHANNEL, SELF LOCKING |
| Thread Class | 3B |
| Base Thickness | 0.070 INCHES MINIMUM AND 0.083 INCHES MAXIMUM IN |
| Thread Quantity Per Inch | 24 |
| Material | IRON ALLOY 660 OVERALL |
| 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 |
|---|---|
| ST3M445C6M2 | The Boeing Company Div Defense (USA) |
| F49249E6-2XN | Howmet Global Fastening Systems Inc (USA) |
| Reference | Meaning |
|---|---|
| 10109854 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
| ST3M445C6M2 | 5/2 Secondary reference U.S. Government activity |
| G18421L2-6 | 3/9 Design control — primary reference Harvard Industries Inc |
NSN 5310-01-156-6426 is a Nut,self-Locking,gang Channel, manufactured by The Boeing Company Div Defense, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-156-6426 has 2 manufacturer part numbers on file: ST3M445C6M2 (The Boeing Company Div Defense), F49249E6-2XN (Howmet Global Fastening Systems Inc).
Key specifications for ST3M445C6M2: Lubrication: DRY FILM LUBRICANT; Nut Length: 0.780 INCHES MINIMUM AND 0.790 INCHES MAXIMUM IN; Thread Series: UNIFIED NATIONAL JOINT FINE (UNJF); Material Document and Classification: AMS 5525 ASSN STD SINGLE MATERIAL RESPONSE OR AMS 5732 ASSN STD SINGLE MATERIAL RESPONSE OVERALL. 19 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.