The Nut,self-Locking,plate, cataloged under National Stock Number 5310-01-133-5836, 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 25 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through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5310-01-133-5836 |
| Primary Part Number | BFN442-5-4 |
| Item Name | Nut,self-Locking,plate |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Bristol Industries, Llc |
| Status | ACTIVE |
| Lubrication | DRY FILM LUBRICANT |
| Plate Thickness | 0.040 INCHES NOMINAL IN |
| Nut Length | 1.396 INCHES MAXIMUM IN |
| Thread Series | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Plate Width | 0.650 INCHES MAXIMUM IN |
| Mounting Hole Arrangement Style | 2 HOLES |
| Removable Nut Manufacturer Part Number | ST3M445C5M4 |
| Material Document and Classification | AMS 5525 ASSN STD SINGLE MATERIAL RESPONSE OR AMS 5732 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Mounting Hole Diameter | 0.130 INCHES MINIMUM AND 0.135 INCHES MAXIMUM IN |
| Nut Counterbore Depth | 0.250 INCHES MINIMUM FIRST END IN |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.312 INCHES IN |
| Counterbore Diameter | 0.317 INCHES MINIMUM FIRST END IN |
| Distance From Aperture Center to Mounting Hole Center | 0.500 INCHES NOMINAL IN |
| Locking Feature | PREVAILING TORQUE ALL METAL DESIGN |
| Center to Center Distance Between Mounting Holes Along Length | 0.312 INCHES NOMINAL IN |
| Nut Height | 0.524 INCHES MAXIMUM IN |
| Surface Treatment | PASSIVATE BASE |
| Surface Treatment | NICKEL OR COPPER OR NICKEL AND COPPER NUT |
| Nut Style | PLATE |
| Thread Class | 3B |
| Thread Quantity Per Inch | 24 |
| Material | IRON ALLOY 660 OVERALL |
| Nut Mounting Provision | STRAIGHT HOLES |
| Removable Nut Manufacturer Code | 76301 |
| 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 |
|---|---|
| BFN442-5-4 PRIMARY | Bristol Industries, Llc (USA) |
| F49251E5-4 PRIMARY | Howmet Global Fastening Systems Inc (USA) |
| Reference | Meaning |
|---|---|
| F18427L4-5 | 5/9 Secondary reference Harvard Industries Inc |
| F18427L4-5 | C/1 Advisory reference — outside the item-of-supply concept Esna, Llc |
| 10109685 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
| ST3M442-5A4 | 7/2 Vendor item drawing reference The Boeing Company Div Defense |
| NS202042-054-4 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5310-01-133-5836 is a Nut,self-Locking,plate, manufactured by Bristol Industries, Llc, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-133-5836 has 2 manufacturer part numbers on file: BFN442-5-4 (Bristol Industries, Llc), F49251E5-4 (Howmet Global Fastening Systems Inc).
Key specifications for BFN442-5-4: Lubrication: DRY FILM LUBRICANT; Plate Thickness: 0.040 INCHES NOMINAL IN; Nut Length: 1.396 INCHES MAXIMUM IN; Thread Series: UNIFIED NATIONAL JOINT FINE (UNJF). 25 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.