The Nut,self-Locking,plate, cataloged under National Stock Number 5310-01-427-9847, 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 24 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5310-01-427-9847 |
| Primary Part Number | ST3M818-4M5 |
| Item Name | Nut,self-Locking,plate |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Plate Thickness | 0.028 INCHES NOMINAL IN |
| Nut Length | 1.292 INCHES MAXIMUM IN |
| Thread Series | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Plate Width | 0.554 INCHES MAXIMUM IN |
| Temp Rating | 450.0 FAHRENHEIT NOMINAL DEGF |
| Mounting Hole Arrangement Style | 2 HOLES |
| Material Document and Classification | AMS 5525 ASSN STD SINGLE MATERIAL RESPONSE OR AMS 5732 ASSN STD SINGLE MATERIAL RESPONSE NUT |
| Material Document and Classification | AMS 5525 ASSN STD SINGLE MATERIAL RESPONSE OR AMS 5732 ASSN STD SINGLE MATERIAL RESPONSE SHELL |
| Mounting Hole Diameter | 0.098 INCHES MINIMUM AND 0.103 INCHES MAXIMUM IN |
| Features Provided | FLOATING NUT |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.250 INCHES IN |
| Distance From Aperture Center to Mounting Hole Center | 0.495 INCHES MINIMUM AND 0.505 INCHES MAXIMUM IN |
| Locking Feature | PREVAILING TORQUE ALL METAL DESIGN |
| Center to Center Distance Between Mounting Holes Along Length | 0.998 INCHES MINIMUM AND 1.000 INCHES MAXIMUM IN |
| Nut Height | 0.500 INCHES MAXIMUM IN |
| Surface Treatment | PASSIVATE SHELL |
| Nut Style | PLATE |
| Thread Class | 3B |
| Thread Quantity Per Inch | 28 |
| Material | IRON ALLOY 660 SHELL |
| Material | IRON ALLOY 660 NUT |
| Material | STEEL CORROSION RESISTING CLIP |
| Nut Mounting Provision | STRAIGHT HOLES |
| 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 |
|---|---|
| ST3M818-4M5 PRIMARY | The Boeing Company Div Defense (USA) |
| ST3M818-4M5 | Howmet Global Fastening Systems Inc. Div Microdot Products (USA) |
| Reference | Meaning |
|---|---|
| F50942-4-5XN | 5/9 Secondary reference Howmet Global Fastening Systems Inc |
| F50942-4-5XN | 5/9 Secondary reference Howmet Global Fastening Systems Inc. Div Microdot Products |
| ST3M818-4M5 | 5/2 Secondary reference U.S. Government activity |
NSN 5310-01-427-9847 is a Nut,self-Locking,plate, manufactured by The Boeing Company Div Defense, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-427-9847 has 2 manufacturer part numbers on file: ST3M818-4M5 (The Boeing Company Div Defense), ST3M818-4M5 (Howmet Global Fastening Systems Inc. Div Microdot Products).
Key specifications for ST3M818-4M5: Overall Height: 0.500 INCHES MAXIMUM IN; Plate Thickness: 0.028 INCHES NOMINAL IN; Nut Length: 1.292 INCHES MAXIMUM IN; Thread Series: UNIFIED NATIONAL JOINT FINE (UNJF). 24 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.