The Nut,self-Locking,plate, cataloged under National Stock Number 5310-01-056-3540, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Sae International Dba Sae International. Government technical data includes 25 specifications, cited from the U.S. Government catalog. The record lists 4 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 7 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-056-3540 |
| Primary Part Number | MS21060L5K |
| Item Name | Nut,self-Locking,plate |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Sae International Dba Sae International |
| Status | ACTIVE |
| Lubrication | DRY FILM LUBRICANT |
| Plate Thickness | 0.045 INCHES MAXIMUM IN |
| Nut Length | 1.292 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Series | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Plate Width | 0.412 INCHES MINIMUM AND 0.609 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 MINIMUM NUT IN |
| Features Provided | FLOATING NUT |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.312 INCHES IN |
| Counterbore Diameter | 0.317 INCHES MINIMUM NUT 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 1.002 INCHES MAXIMUM IN |
| Nut Height | 0.328 INCHES MAXIMUM IN |
| Surface Treatment | PASSIVATE OVERALL |
| Nut Style | PLATE |
| Thread Class | 3B |
| Thread Quantity Per Inch | 24 |
| Material | IRON ALLOY 660 OVERALL |
| Nut Mounting Provision | DIMPLED 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 |
|---|---|
| RF200C5MK | Republic Fastener Mfg. Corp. Dba Arconic Fastening Systems (USA) |
| MS21060L5K PRIMARY | Sae International Dba Sae International (USA) |
| F5001-5BC | Howmet Global Fastening Systems Inc (USA) |
| RMLHTA521-2860-054BC | Esna, Llc (USA) |
| Reference | Meaning |
|---|---|
| T65C524CBCM | 5/9 Secondary reference Sps Technologies, Llc Dba Cherry Aerospace Div Div Cherry Aerospace |
| 13705E-054BC | 5/9 Secondary reference Sps Technologies, Llc Dba PB Fasteners |
| MS21060L5K | 5/9 Secondary reference U.S. Government activity |
| MS21060L5K | 3/9 Design control — primary reference U.S. Government activity |
| F5001-5BC | 5/9 Secondary reference Howmet Global Fastening Systems Inc. Div Microdot Products |
| 13705E-054BC | 5/2 Secondary reference U.S. Government activity |
| RMLHTA521-2860-054BC | 5/9 Secondary reference Harvard Industries Inc |
NSN 5310-01-056-3540 is a Nut,self-Locking,plate, manufactured by Sae International Dba Sae International, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-056-3540 has 4 manufacturer part numbers on file: RF200C5MK (Republic Fastener Mfg. Corp. Dba Arconic Fastening Systems), MS21060L5K (Sae International Dba Sae International), F5001-5BC (Howmet Global Fastening Systems Inc), RMLHTA521-2860-054BC (Esna, Llc).
Key specifications for MS21060L5K: Lubrication: DRY FILM LUBRICANT; Plate Thickness: 0.045 INCHES MAXIMUM IN; Nut Length: 1.292 INCHES MAXIMUM IN; Surface Treatment Document and Classification: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL. 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.