The Nut,plain,cap, cataloged under National Stock Number 5310-00-897-3040, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Carver Pump Company. Government technical data includes 11 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-00-897-3040 |
| Primary Part Number | 16HCS-25 PIECE 5 |
| Item Name | Nut,plain,cap |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Carver Pump Company |
| Status | ACTIVE |
| Width Across Flats | 2.000 INCHES NOMINAL IN |
| Thread Series | UNF |
| Material Document and Classification | QQ-N-281 FED SPEC ALL MATERIAL RESPONSES OVERALL |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 1.250 INCHES IN |
| Nut Height | 1.125 INCHES NOMINAL IN |
| Nut Style | CAP |
| Thread Class | 2B |
| Thread Quantity Per Inch | 12 |
| Material | NICKEL ALLOY 400 OR NICKEL ALLOY R-405 OVERALL |
| Bearing Surface Type | CHAMFERED |
| 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 |
|---|---|
| 16HCS-25 PIECE 5 | Carver Pump Company (USA) |
| Reference | Meaning |
|---|---|
| 16-8-1MA | 5/9 Secondary reference Aurora Pump a Unit of General Signal Corp |
| 16HCS-25 PIECE 5 | 5/9 Secondary reference Aurora Pump a Unit of General Signal Corp |
| 544-2138-235 | 3/9 Design control — primary reference Aurora Pump a Unit of General Signal Corp |
NSN 5310-00-897-3040 is a Nut,plain,cap, manufactured by Carver Pump Company, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-00-897-3040 has 1 manufacturer part number on file: 16HCS-25 PIECE 5 (Carver Pump Company).
Key specifications for 16HCS-25 PIECE 5: Width Across Flats: 2.000 INCHES NOMINAL IN; Thread Series: UNF; Material Document and Classification: QQ-N-281 FED SPEC ALL MATERIAL RESPONSES OVERALL; Thread Direction: RIGHT-HAND. 11 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.