The Nut,plain,round, cataloged under National Stock Number 5310-00-567-0255, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp. Government technical data includes 16 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-00-567-0255 |
| Primary Part Number | S1640-61134 |
| Item Name | Nut,plain,round |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp |
| Status | ACTIVE |
| Surface Treatment Document and Classification | MIL-A-8625 MIL SPEC 1ST TREATMENT RESPONSE AND MIL-P-8585 MIL SPEC 2ND TREATMENT RESPONSE OVERALL |
| Thread Series | UNF |
| Hole Configuration Style | CONFIGURATION J |
| Material Document and Classification | QQ-A-225/6 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 1.125 INCHES IN |
| Nut Diameter | 1.500 INCHES NOMINAL IN |
| Nut Thickness | 0.656 INCHES NOMINAL IN |
| Drilled Hole Diameter | 0.062 INCHES NOMINAL IN |
| Surface Treatment | ANODIZE AND PAINT OVERALL |
| Countersink Angle | 110.0 DEGREES NOMINAL NUT |
| Nut Style | ROUND |
| Thread Class | 3B |
| Thread Quantity Per Inch | 12 |
| Material | ALUMINUM ALLOY 2024 OVERALL |
| Hole Type and Quantity | 6 DRILLED |
| 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 |
|---|---|
| S1640-61134 | Airbus Deutschland Gmbh -Werk Bremen- (DEU) |
| S1640-61134 PRIMARY | Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp (USA) |
NSN 5310-00-567-0255 is a Nut,plain,round, manufactured by Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-567-0255 has 2 manufacturer part numbers on file: S1640-61134 (Airbus Deutschland Gmbh -Werk Bremen-), S1640-61134 (Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp).
Key specifications for S1640-61134: Surface Treatment Document and Classification: MIL-A-8625 MIL SPEC 1ST TREATMENT RESPONSE AND MIL-P-8585 MIL SPEC 2ND TREATMENT RESPONSE OVERALL; Thread Series: UNF; Hole Configuration Style: CONFIGURATION J; Material Document and Classification: QQ-A-225/6 FED SPEC SINGLE MATERIAL RESPONSE OVERALL. 16 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.