The Nut,self-Locking,plate, cataloged under National Stock Number 5310-00-772-7946, 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 25 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through both NSN and commercial part number lookups. 9 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-00-772-7946 |
| Primary Part Number | R2100C4 |
| Item Name | Nut,self-Locking,plate |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Republic Fastener Mfg. Corp. Dba Arconic Fastening Systems |
| Status | ACTIVE |
| Plate Thickness | 0.055 INCHES MAXIMUM IN |
| Nut Length | 1.260 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | AMS 2410 ASSN STD SINGLE TREATMENT RESPONSE OVERALL |
| Thread Series | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Precious Material | SILVER |
| Plate Width | 0.535 INCHES MINIMUM AND 0.619 INCHES MAXIMUM IN |
| Temp Rating | 800.0 FAHRENHEIT MAXIMUM DEGF |
| Mounting Hole Arrangement Style | 2 HOLES |
| Hardness Rating | 49.0 ROCKWELL C MAXIMUM |
| Material Document and Classification | AMS 5525 ASSN STD SINGLE MATERIAL RESPONSE OR AMS 5732 ASSN STD SINGLE MATERIAL RESPONSE OR AMS 5737 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Mounting Hole Diameter | 0.098 INCHES MINIMUM AND 0.103 INCHES MAXIMUM IN |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.250 INCHES 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 | 0.340 INCHES MAXIMUM IN |
| Surface Treatment | SILVER OVERALL |
| Precious Material and Location | ALL SURFACES SILVER |
| Countersink Angle | 99.0 DEGREES MINIMUM AND 101.0 DEGREES MAXIMUM NUT |
| Nut Style | PLATE |
| Thread Class | 3B |
| Thread Quantity Per Inch | 28 |
| 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 |
|---|---|
| R2100C4 | Republic Fastener Mfg. Corp. Dba Arconic Fastening Systems (USA) |
| K1131-4 | Howmet Global Fastening Systems Inc (USA) |
| Reference | Meaning |
|---|---|
| LHTA58-2860-048 | 5/9 Secondary reference Harvard Industries Inc |
| 15700-048 | 5/9 Secondary reference Sps Technologies, Llc Dba PB Fasteners |
| LHTA58-2860-048 | C/1 Advisory reference — outside the item-of-supply concept Esna, Llc |
| K1131-4 | 5/9 Secondary reference Howmet Global Fastening Systems Inc. Div Microdot Products |
| T2CH428 | 5/9 Secondary reference Sps Technologies, Llc Dba Cherry Aerospace Div Div Cherry Aerospace |
| 15700-048 | 5/2 Secondary reference U.S. Government activity |
| MS21050-4 | 5/9 Secondary reference U.S. Government activity |
| NAS681C4 | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
| MS21050-4 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5310-00-772-7946 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 5310-00-772-7946 has 2 manufacturer part numbers on file: R2100C4 (Republic Fastener Mfg. Corp. Dba Arconic Fastening Systems), K1131-4 (Howmet Global Fastening Systems Inc).
Key specifications for R2100C4: Plate Thickness: 0.055 INCHES MAXIMUM IN; Nut Length: 1.260 INCHES MAXIMUM IN; Surface Treatment Document and Classification: AMS 2410 ASSN STD SINGLE TREATMENT RESPONSE OVERALL; Thread Series: UNIFIED NATIONAL JOINT FINE (UNJF). 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.