The Nut,self-Locking,gang Channel, cataloged under National Stock Number 5310-01-131-2248, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Bristol Industries, Llc. Government technical data includes 17 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through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-131-2248 |
| Primary Part Number | BCN445C4-5 |
| Item Name | Nut,self-Locking,gang Channel |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Bristol Industries, Llc |
| Status | ACTIVE |
| Lubrication | DRY FILM LUBRICANT |
| Nut Length | 0.557 INCHES MINIMUM AND 0.567 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 | 0.288 INCHES MINIMUM NUT IN |
| Base Width | 0.395 INCHES MINIMUM AND 0.405 INCHES MAXIMUM IN |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.250 INCHES IN |
| Counterbore Diameter | 0.254 INCHES MINIMUM NUT IN |
| Locking Feature | PREVAILING TORQUE ALL METAL DESIGN |
| Nut Height | 0.496 INCHES MAXIMUM IN |
| Surface Treatment | NICKEL AND COPPER OR COPPER OVERALL |
| Nut Style | GANG CHANNEL, SELF LOCKING |
| Thread Class | 3B |
| Base Thickness | 0.040 INCHES MINIMUM AND 0.052 INCHES MAXIMUM IN |
| Thread Quantity Per Inch | 28 |
| 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 |
|---|---|
| BCN445C4-5 | Bristol Industries, Llc (USA) |
| F49249E4-5XN | Howmet Global Fastening Systems Inc (USA) |
| Reference | Meaning |
|---|---|
| G18421L5-4 | 5/9 Secondary reference Harvard Industries Inc |
| NS103966S-048-5 | 5/2 Secondary reference U.S. Government activity |
| 10109591 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
| G18421L5-4 | 3/2 Design control — primary reference U.S. Government activity |
| ST3M445C4M5 | 7/2 Vendor item drawing reference The Boeing Company Div Defense |
NSN 5310-01-131-2248 is a Nut,self-Locking,gang Channel, manufactured by Bristol Industries, Llc, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-131-2248 has 2 manufacturer part numbers on file: BCN445C4-5 (Bristol Industries, Llc), F49249E4-5XN (Howmet Global Fastening Systems Inc).
Key specifications for BCN445C4-5: Lubrication: DRY FILM LUBRICANT; Nut Length: 0.557 INCHES MINIMUM AND 0.567 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. 17 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.