The Nut,self-Locking,plate, cataloged under National Stock Number 5310-00-477-2712, 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through both NSN and commercial part number lookups. 8 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-00-477-2712 |
| Primary Part Number | MK4300-5 |
| 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 | 0.065 INCHES MAXIMUM IN |
| Nut Length | 0.747 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | QQ-P-416,TY 2,CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Series | UNF |
| Plate Width | 0.475 INCHES MINIMUM AND 0.505 INCHES MAXIMUM IN |
| Temp Rating | 450.0 FAHRENHEIT NOMINAL DEGF |
| Mounting Hole Arrangement Style | 2 HOLES |
| Hardness Rating | 49.0 ROCKWELL C MAXIMUM |
| Mounting Hole Diameter | 0.130 INCHES MINIMUM AND 0.135 INCHES MAXIMUM IN |
| Nut Counterbore Depth | 0.062 INCHES NOMINAL NUT IN |
| Thread Direction | RIGHT-HAND |
| Center to Center Distance Between Mounting Holes Along Width | 0.267 INCHES MINIMUM AND 0.271 INCHES MAXIMUM IN |
| Nominal Thread Size | 0.312 INCHES IN |
| Counterbore Diameter | 0.317 INCHES MINIMUM NUT IN |
| Distance From Aperture Center to Mounting Hole Center | 0.354 INCHES MINIMUM AND 0.364 INCHES MAXIMUM IN |
| Locking Feature | PREVAILING TORQUE ALL METAL DESIGN |
| Nut Height | 0.328 INCHES MAXIMUM IN |
| Surface Treatment | CADMIUM AND CHROMATE OVERALL |
| Nut Style | PLATE |
| Thread Class | 3B |
| Thread Quantity Per Inch | 24 |
| Material | STEEL 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 |
|---|---|
| MK4300-5 | Howmet Global Fastening Systems Inc (USA) |
| MT13S524 | Republic Fastener Mfg. Corp. Dba Arconic Fastening Systems (USA) |
| MK4300-5 | Satair A/s (DNK) |
| Reference | Meaning |
|---|---|
| RM52LHTA575M-054 | 5/9 Secondary reference Harvard Industries Inc |
| MA12640NM054 | 5/2 Secondary reference U.S. Government activity |
| MT13S524 | 5/9 Secondary reference Sps Technologies, Llc Dba Cherry Aerospace Div Div Cherry Aerospace |
| MK4300-5 | 5/9 Secondary reference Howmet Global Fastening Systems Inc. Div Microdot Products |
| MS21086L5 | 3/2 Design control — primary reference U.S. Government activity |
| MS21086L5 | 5/9 Secondary reference U.S. Government activity |
| MA 12640-054 | 5/9 Secondary reference Sps Technologies, Llc Dba PB Fasteners |
| MA 12640-054 | 5/2 Secondary reference U.S. Government activity |
NSN 5310-00-477-2712 is a Nut,self-Locking,plate, manufactured by Howmet Global Fastening Systems Inc, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-477-2712 has 3 manufacturer part numbers on file: MK4300-5 (Howmet Global Fastening Systems Inc), MT13S524 (Republic Fastener Mfg. Corp. Dba Arconic Fastening Systems), MK4300-5 (Satair A/s).
Key specifications for MK4300-5: Lubrication: DRY FILM LUBRICANT; Plate Thickness: 0.065 INCHES MAXIMUM IN; Nut Length: 0.747 INCHES MAXIMUM IN; Surface Treatment Document and Classification: QQ-P-416,TY 2,CL 3 FED SPEC SINGLE TREATMENT RESPONSE 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.