The Nut,plain,hexagon, cataloged under National Stock Number 5310-01-623-5997, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Naval Sea Systems Command. Government technical data includes 13 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-623-5997 |
| Primary Part Number | 261-7444566-F36 |
| Item Name | Nut,plain,hexagon |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Width Across Flats | 2.250 INCHES NOMINAL IN |
| Surface Treatment Document and Classification | MIL-A-8625, TYPE II MIL SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Series | UN |
| Material Document and Classification | QQ/A-225/8 ASSN STD 1ST MATERIAL RESPONSE OR QQ/A-200/8 ASSN STD 1ST MATERIAL RESPONSE OR WW/T-700/6 ASSN STD 1ST MATERIAL RESPONSE OVERALL |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 1.875 INCHES IN |
| Nut Height | 0.310 INCHES NOMINAL IN |
| Surface Treatment | ANODIZE OVERALL |
| Nut Style | HEXAGON |
| Thread Class | 2B |
| Thread Quantity Per Inch | 16 |
| Material | ALUMINUM ALLOY OVERALL |
| Bearing Surface Type | FLAT |
| 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 |
|---|---|
| 261-7444566-F36 | Naval Sea Systems Command (USA) |
| 20N01-20DG | Hydraflow (USA) |
| Reference | Meaning |
|---|---|
| T2236-125BM | 3/9 Design control — primary reference Eaton Aviation Corporation |
NSN 5310-01-623-5997 is a Nut,plain,hexagon, manufactured by Naval Sea Systems Command, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-623-5997 has 2 manufacturer part numbers on file: 261-7444566-F36 (Naval Sea Systems Command), 20N01-20DG (Hydraflow).
Key specifications for 261-7444566-F36: Width Across Flats: 2.250 INCHES NOMINAL IN; Surface Treatment Document and Classification: MIL-A-8625, TYPE II MIL SPEC SINGLE TREATMENT RESPONSE OVERALL; Thread Series: UN; Material Document and Classification: QQ/A-225/8 ASSN STD 1ST MATERIAL RESPONSE OR QQ/A-200/8 ASSN STD 1ST MATERIAL RESPONSE OR WW/T-700/6 ASSN STD 1ST MATERIAL RESPONSE OVERALL. 13 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.