The Nut,self-Locking,plate, cataloged under National Stock Number 5310-01-004-6951, 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 22 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-004-6951 |
| Primary Part Number | ST3M657C7 |
| Item Name | Nut,self-Locking,plate |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Lubrication | DRY FILM LUBRICANT |
| Plate Thickness | 0.032 INCHES NOMINAL IN |
| Nut Length | 1.602 INCHES MAXIMUM IN |
| Thread Series | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Plate Width | 0.859 INCHES MAXIMUM IN |
| Mounting Hole Arrangement Style | 2 HOLES |
| Material Document and Classification | AMS 5525 ASSN STD 1ST MATERIAL RESPONSE OR AMS 5735 ASSN STD 2ND MATERIAL RESPONSE OVERALL |
| Mounting Hole Diameter | 0.130 INCHES MINIMUM AND 0.135 INCHES MAXIMUM IN |
| Nut Counterbore Depth | 0.062 INCHES MINIMUM NUT IN |
| Features Provided | FLOATING NUT |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.438 INCHES IN |
| Counterbore Diameter | 0.442 INCHES MINIMUM NUT IN |
| Distance From Aperture Center to Mounting Hole Center | 0.620 INCHES MINIMUM AND 0.630 INCHES MAXIMUM IN |
| Locking Feature | PREVAILING TORQUE ALL METAL DESIGN |
| Center to Center Distance Between Mounting Holes Along Length | 1.248 INCHES MINIMUM AND 1.252 INCHES MAXIMUM IN |
| Nut Height | 0.400 INCHES MAXIMUM IN |
| Nut Style | PLATE |
| Thread Class | 3B |
| Thread Quantity Per Inch | 20 |
| Material | IRON ALLOY 660 OVERALL |
| 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 |
|---|---|
| ST3M657C7 PRIMARY | The Boeing Company Div Defense (USA) |
| ST3M657C7 | Howmet Global Fastening Systems Inc. Div Microdot Products (USA) |
| Reference | Meaning |
|---|---|
| F49562-7 | 5/9 Secondary reference Howmet Global Fastening Systems Inc |
| F49562-7 | 5/9 Secondary reference Howmet Global Fastening Systems Inc. Div Microdot Products |
NSN 5310-01-004-6951 is a Nut,self-Locking,plate, manufactured by The Boeing Company Div Defense, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-004-6951 has 2 manufacturer part numbers on file: ST3M657C7 (The Boeing Company Div Defense), ST3M657C7 (Howmet Global Fastening Systems Inc. Div Microdot Products).
Key specifications for ST3M657C7: Lubrication: DRY FILM LUBRICANT; Plate Thickness: 0.032 INCHES NOMINAL IN; Nut Length: 1.602 INCHES MAXIMUM IN; Thread Series: UNIFIED NATIONAL JOINT FINE (UNJF). 22 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.