The Nut,plain,hexagon, cataloged under National Stock Number 5310-01-257-2156, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Aqua-Chem, Inc. Dba Aqua-Chem Inc. Government technical data includes 1 specification, 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5310-01-257-2156 |
| Primary Part Number | 633-C-7541 ITEM 61 |
| Item Name | Nut,plain,hexagon |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Aqua-Chem, Inc. Dba Aqua-Chem Inc |
| Status | ACTIVE |
| Material | NICKEL ALLOY 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 |
|---|---|
| 633-C-7541 ITEM 61 PRIMARY | Aqua-Chem, Inc. Dba Aqua-Chem Inc (USA) |
| 930-077557-000 | Aqua-Chem, Inc. Dba Aqua-Chem Inc (USA) |
| Reference | Meaning |
|---|---|
| 633-C-7541 ITEM 61 | 5/9 Secondary reference Aqua-Chem, Inc. |
NSN 5310-01-257-2156 is a Nut,plain,hexagon, manufactured by Aqua-Chem, Inc. Dba Aqua-Chem Inc, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-257-2156 has 2 manufacturer part numbers on file: 633-C-7541 ITEM 61 (Aqua-Chem, Inc. Dba Aqua-Chem Inc), 930-077557-000 (Aqua-Chem, Inc. Dba Aqua-Chem Inc).
Key specifications for 633-C-7541 ITEM 61: Special Features: MATERIAL: NICKEL COPPER ALLOY (NICU); Part Name Assigned by Controlling Agency: HEX NUT; Material: NICKEL ALLOY OVERALL. 1 specification is 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.