The Nut,self-Locking,plate, cataloged under National Stock Number 5310-00-784-8145, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Republic Fastener Mfg. Corp. Dba Arconic Fastening Systems. Government technical data includes 23 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through both NSN and commercial part number lookups. 10 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-00-784-8145 |
| Primary Part Number | RFM20A4 |
| Item Name | Nut,self-Locking,plate |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Republic Fastener Mfg. Corp. Dba Arconic Fastening Systems |
| Status | ACTIVE |
| Lubrication | DRY FILM LUBRICANT |
| Plate Thickness | 0.140 INCHES MAXIMUM IN |
| Nut Length | 0.801 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | QQ-P-416,TY 2,CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Series | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Plate Width | 0.350 INCHES MINIMUM AND 0.500 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 | 0.098 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 | 0.276 INCHES MINIMUM AND 0.286 INCHES MAXIMUM IN |
| Locking Feature | PREVAILING TORQUE ALL METAL DESIGN |
| Center to Center Distance Between Mounting Holes Along Length | 0.560 INCHES MINIMUM AND 0.564 INCHES MAXIMUM IN |
| Nut Height | 0.281 INCHES MAXIMUM IN |
| Surface Treatment | CADMIUM AND CHROMATE OVERALL |
| Nut Style | PLATE |
| Thread Class | 3B |
| Thread Quantity Per Inch | 28 |
| 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 |
|---|---|
| RFM20A4 | Republic Fastener Mfg. Corp. Dba Arconic Fastening Systems (USA) |
| MF5000-4 | Howmet Global Fastening Systems Inc (USA) |
| MT65S428S | Republic Fastener Mfg. Corp. Dba Arconic Fastening Systems (USA) |
| MF5000-4 | Satair A/s (DNK) |
| Reference | Meaning |
|---|---|
| 02-14051A05 | 5/9 Secondary reference U.S. Government activity |
| MA 13600-048 | 5/2 Secondary reference U.S. Government activity |
| MS21075L4E | 5/9 Secondary reference U.S. Government activity |
| 10121701 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
| MS21075L4E | 3/2 Design control — primary reference U.S. Government activity |
| 02-14051A05 | C/1 Advisory reference — outside the item-of-supply concept General Dynamics Mission Systems, Inc. Dba Gdms |
| 5310PL0150442 | 6/9 Informative reference only Jednolity Indeks Materialowy - Uniform Material Index |
| MT65S428S | 5/9 Secondary reference Sps Technologies, Llc Dba Cherry Aerospace Div Div Cherry Aerospace |
| MF5000-4 | 5/9 Secondary reference Howmet Global Fastening Systems Inc. Div Microdot Products |
| MA 13600-048 | 5/9 Secondary reference Sps Technologies, Llc Dba PB Fasteners |
NSN 5310-00-784-8145 is a Nut,self-Locking,plate, manufactured by Republic Fastener Mfg. Corp. Dba Arconic Fastening Systems, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-784-8145 has 4 manufacturer part numbers on file: RFM20A4 (Republic Fastener Mfg. Corp. Dba Arconic Fastening Systems), MF5000-4 (Howmet Global Fastening Systems Inc), MT65S428S (Republic Fastener Mfg. Corp. Dba Arconic Fastening Systems), MF5000-4 (Satair A/s).
Key specifications for RFM20A4: Lubrication: DRY FILM LUBRICANT; Plate Thickness: 0.140 INCHES MAXIMUM IN; Nut Length: 0.801 INCHES MAXIMUM IN; Surface Treatment Document and Classification: QQ-P-416,TY 2,CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL. 23 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.