The Nut,plain,hexagon, cataloged under National Stock Number 5310-00-660-2644, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Knds Deutschland Gmbh & Co. Kg - Werk Kassel -. 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-00-660-2644 |
| Primary Part Number | 25704-281290-03-0 |
| Item Name | Nut,plain,hexagon |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Knds Deutschland Gmbh & Co. Kg - Werk Kassel - |
| Status | ACTIVE |
| Width Across Flats | 0.736 INCHES MINIMUM AND 0.750 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | QQ-P-416,TY 2,CL 3 FED SPEC 1ST TREATMENT RESPONSE OR QQ-Z-325,TY 2,CL 3 FED SPEC 2ND TREATMENT RESPONSE OVERALL |
| Thread Series | UNF |
| Hardness Rating | 163.0 BRINELL STANDARD MINIMUM |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.500 INCHES IN |
| Nut Height | 0.302 INCHES MINIMUM AND 0.323 INCHES MAXIMUM IN |
| Surface Treatment | CADMIUM OR ZINC OVERALL |
| Nut Style | HEXAGON |
| Thread Class | 2B |
| Thread Quantity Per Inch | 20 |
| Material | STEEL OVERALL |
| Bearing Surface Type | CHAMFERED OR WASHER FACED |
| 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 |
|---|---|
| 25704-281290-03-0 | Knds Deutschland Gmbh & Co. Kg - Werk Kassel - (DEU) |
| 25704-281290-03-0 | Baainbw Dokumente Ohne Nutzungsrechte Des Baainbw Fur Beschaffungszwecke (DEU) |
| Reference | Meaning |
|---|---|
| MS35691-828 | 5/9 Secondary reference Liebherr-Aerospace Lindenberg Gmbh |
| MS35691-828 | 2/2 Government specification standardization U.S. Government activity |
| MS35691-828 | 5/9 Secondary reference Feinmechanische Werke Mainz Gmbh |
NSN 5310-00-660-2644 is a Nut,plain,hexagon, manufactured by Knds Deutschland Gmbh & Co. Kg - Werk Kassel -, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-660-2644 has 2 manufacturer part numbers on file: 25704-281290-03-0 (Knds Deutschland Gmbh & Co. Kg - Werk Kassel -), 25704-281290-03-0 (Baainbw Dokumente Ohne Nutzungsrechte Des Baainbw Fur Beschaffungszwecke).
Key specifications for 25704-281290-03-0: Width Across Flats: 0.736 INCHES MINIMUM AND 0.750 INCHES MAXIMUM IN; Surface Treatment Document and Classification: QQ-P-416,TY 2,CL 3 FED SPEC 1ST TREATMENT RESPONSE OR QQ-Z-325,TY 2,CL 3 FED SPEC 2ND TREATMENT RESPONSE OVERALL; Thread Series: UNF; Hardness Rating: 163.0 BRINELL STANDARD MINIMUM. 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.