The Nut,plain,round, cataloged under National Stock Number 5310-01-123-8490, 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 19 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-123-8490 |
| Primary Part Number | 64356-04051-107 |
| 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-C-13924,CL 1 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Series | UNS |
| Hardness Rating | 26.0 ROCKWELL C MINIMUM AND 33.0 ROCKWELL C MAXIMUM |
| Thread Pitch Diameters | +2.1209 TO 2.1260 INCHES IN |
| Material Document and Classification | MIL-S-6758 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Drive Point Width | 0.250 INCHES MINIMUM AND 0.260 INCHES MAXIMUM IN |
| Thread Direction | LEFT-HAND |
| Nominal Thread Size | 2.157 INCHES IN |
| Nut Diameter | 2.562 INCHES MINIMUM AND 2.572 INCHES MAXIMUM IN |
| Drive Point Depth | 0.086 INCHES MINIMUM AND 0.091 INCHES MAXIMUM IN |
| Undercut Thickness | 0.095 INCHES MINIMUM AND 0.105 INCHES MAXIMUM IN |
| Nut Thickness | 0.307 INCHES MINIMUM AND 0.317 INCHES MAXIMUM IN |
| Small End Diameter | 2.475 INCHES MINIMUM AND 2.480 INCHES MAXIMUM IN |
| Surface Treatment | OXIDE OVERALL |
| Countersink Angle | 90.0 DEGREES NOMINAL NUT |
| Drive Point Quantity | 8 |
| Nut Style | ROUND |
| Thread Quantity Per Inch | 18 |
| Material | STEEL COMP 4130 OVERALL |
| 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 |
|---|---|
| 64356-04051-107 PRIMARY | Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp (USA) |
NSN 5310-01-123-8490 is a Nut,plain,round, manufactured by Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-123-8490 has 1 manufacturer part number on file: 64356-04051-107 (Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp).
Key specifications for 64356-04051-107: Surface Treatment Document and Classification: MIL-C-13924,CL 1 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL; Thread Series: UNS; Hardness Rating: 26.0 ROCKWELL C MINIMUM AND 33.0 ROCKWELL C MAXIMUM; Thread Pitch Diameters: +2.1209 TO 2.1260 INCHES IN. 19 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.