The Nut,self-Locking,plate, cataloged under National Stock Number 5310-01-193-7642, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Howmet Global Fastening Systems Inc. Government technical data includes 24 specifications, cited from the U.S. Government catalog. The record lists 3 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-193-7642 |
| Primary Part Number | MF51637-3 |
| Item Name | Nut,self-Locking,plate |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Howmet Global Fastening Systems Inc |
| Status | ACTIVE |
| Lubrication | DRY FILM LUBRICANT |
| Plate Thickness | 0.140 INCHES MAXIMUM IN |
| Nut Length | 0.739 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | QQ-P-416,CLASS 2 FED SPEC ALL TREATMENT RESPONSES OVERALL |
| Thread Series | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Plate Width | 0.416 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 OVERALL |
| Mounting Hole Diameter | 0.098 INCHES MINIMUM AND 0.103 INCHES MAXIMUM IN |
| Features Provided | FLOATING NUT |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.190 INCHES IN |
| Counterbore Diameter | 0.194 INCHES MINIMUM NUT IN |
| Distance From Aperture Center to Mounting Hole Center | 0.245 INCHES MINIMUM AND 0.255 INCHES MAXIMUM IN |
| Locking Feature | PREVAILING TORQUE ALL METAL DESIGN |
| Center to Center Distance Between Mounting Holes Along Length | 0.498 INCHES MINIMUM AND 0.502 INCHES MAXIMUM IN |
| Nut Height | 0.250 INCHES MAXIMUM IN |
| Surface Treatment | CADMIUM OR CADMIUM AND CHROMATE OR CADMIUM AND PHOSPHATE OVERALL |
| Nut Style | PLATE |
| Thread Class | 3B |
| Thread Quantity Per Inch | 32 |
| 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 |
|---|---|
| MF51637-3 PRIMARY | Howmet Global Fastening Systems Inc (USA) |
| MF53050-3CD | Howmet Global Fastening Systems Inc (USA) |
| BRFM20C3D PRIMARY | Republic Fastener Mfg. Corp. Dba Arconic Fastening Systems (USA) |
| Reference | Meaning |
|---|---|
| BACN10JN3CD | 7/2 Vendor item drawing reference U.S. Government activity |
| 102F9201M-3 | 5/9 Secondary reference Harvard Industries Inc |
| NS202487-02 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5310-01-193-7642 is a Nut,self-Locking,plate, manufactured by Howmet Global Fastening Systems Inc, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-193-7642 has 3 manufacturer part numbers on file: MF51637-3 (Howmet Global Fastening Systems Inc), MF53050-3CD (Howmet Global Fastening Systems Inc), BRFM20C3D (Republic Fastener Mfg. Corp. Dba Arconic Fastening Systems).
1 possible match (shared part number, not a government interchangeability claim): 5310-01-720-6898. Verify interchangeability with system specifications before substitution.
Key specifications for MF51637-3: Lubrication: DRY FILM LUBRICANT; Plate Thickness: 0.140 INCHES MAXIMUM IN; Nut Length: 0.739 INCHES MAXIMUM IN; Surface Treatment Document and Classification: QQ-P-416,CLASS 2 FED SPEC ALL TREATMENT RESPONSES OVERALL. 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.