The Nut,self-Locking,plate, cataloged under National Stock Number 5310-00-778-9284, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Racine Jules and Co.. Government technical data includes 27 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number 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through both NSN and commercial part number lookups. 7 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5310-00-778-9284 |
| Primary Part Number | T66S428SBCCPC |
| Item Name | Nut,self-Locking,plate |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Racine Jules and Co. |
| Status | ACTIVE |
| Lubrication | SOLUBLE LUBRICANT |
| Plate Thickness | 0.032 INCHES MAXIMUM IN |
| Nut Length | 1.306 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | QQ-P-416,TY 2,CL 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Series | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Plate Width | 0.350 INCHES MINIMUM AND 0.531 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 Countersink Angle | 98.0 DEGREES MINIMUM AND 102.0 DEGREES MAXIMUM |
| Mounting Hole Diameter | 0.098 INCHES MINIMUM AND 0.103 INCHES MAXIMUM IN |
| Mounting Provision Location | OPPOSITE NUT PROJECTION SIDE |
| Nut Counterbore Depth | 0.062 INCHES MINIMUM NUT IN |
| Features Provided | FLOATING NUT |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.250 INCHES IN |
| Counterbore Diameter | 0.254 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 | 0.310 INCHES MINIMUM AND 0.314 INCHES MAXIMUM IN |
| Nut Height | 0.281 INCHES MAXIMUM IN |
| Surface Treatment | CADMIUM OVERALL |
| Nut Style | PLATE |
| Thread Class | 3B |
| Thread Quantity Per Inch | 28 |
| Material | STEEL OVERALL |
| Nut Mounting Provision | COUNTERSUNK 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 |
|---|---|
| T66S428SBCCPC | Racine Jules and Co. (CHE) |
| Reference | Meaning |
|---|---|
| RF100X4K | 5/9 Secondary reference Republic Fastener Mfg. Corp. Dba Arconic Fastening Systems |
| F2000-4BCCW | 5/9 Secondary reference Howmet Global Fastening Systems Inc |
| MS21061-4K | 3/2 Design control — primary reference U.S. Government activity |
| MS21061-4K | 5/9 Secondary reference U.S. Government activity |
| 13615NM-048BC | 5/9 Secondary reference U.S. Government activity |
| 13615NM-048BC | 5/9 Secondary reference Sps Technologies, Llc Dba PB Fasteners |
| F52LHTA517-048BC | 5/9 Secondary reference Harvard Industries Inc |
NSN 5310-00-778-9284 is a Nut,self-Locking,plate, manufactured by Racine Jules and Co., classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-778-9284 has 1 manufacturer part number on file: T66S428SBCCPC (Racine Jules and Co.).
Key specifications for T66S428SBCCPC: Lubrication: SOLUBLE LUBRICANT; Plate Thickness: 0.032 INCHES MAXIMUM IN; Nut Length: 1.306 INCHES MAXIMUM IN; Surface Treatment Document and Classification: QQ-P-416,TY 2,CL 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL. 27 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.