The Nut,plain,cap, cataloged under National Stock Number 5310-01-504-4985, 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 6 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-504-4985 |
| Primary Part Number | 781-0500-921 |
| Item Name | Nut,plain,cap |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Carver Pump Company |
| Status | ACTIVE |
| Thread Series | UNIFIED NATIONAL COARSE (UNC) |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.500 INCHES IN |
| Thread Quantity Per Inch | 13 |
| Material | STEEL COMP 316 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 |
|---|---|
| 781-0500-921 PRIMARY | Carver Pump Company (USA) |
| 781-0500-921 | All-Safe Inc (USA) |
| Reference | Meaning |
|---|---|
| 999-4213-F-06-24 | 5/9 Secondary reference Carver Pump Company |
| 999-4213-F-06 ITEM 24 | 3/9 Design control — primary reference Carver Pump Company |
NSN 5310-01-504-4985 is a Nut,plain,cap, manufactured by Carver Pump Company, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-504-4985 has 2 manufacturer part numbers on file: 781-0500-921 (Carver Pump Company), 781-0500-921 (All-Safe Inc).
Key specifications for 781-0500-921: Thread Series: UNIFIED NATIONAL COARSE (UNC); Thread Direction: RIGHT-HAND; Nominal Thread Size: 0.500 INCHES IN; Part Name Assigned by Controlling Agency: NUT, ACORN. 6 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.