The Bonnet,valve, cataloged under National Stock Number 4820-01-057-6249, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Naval Sea Systems Command. Government technical data includes 1 specification, 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 4820-01-057-6249 |
| Primary Part Number | 640-517-2119022PC7 |
| Item Name | Bonnet,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| General Characteristics Item Description | MATL PHOSPHOROUS BRONZE; MAXIMUM OD 2.125 IN.; SMALLEST ID 0.502 IN. IN |
| 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 |
|---|---|
| 640-517-2119022PC7 | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| SSBN640-517-2119022 | D/9 Drawing number reference only Naval Sea Systems Command |
| 76655-31X1PC7 | 3/2 Design control — primary reference U.S. Government activity |
| 76655-31X1PC7 | 5/9 Secondary reference U.S. Government activity |
NSN 4820-01-057-6249 is a Bonnet,valve, manufactured by Naval Sea Systems Command, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-057-6249 has 1 manufacturer part number on file: 640-517-2119022PC7 (Naval Sea Systems Command).
Key specifications for 640-517-2119022PC7: General Characteristics Item Description: MATL PHOSPHOROUS BRONZE; MAXIMUM OD 2.125 IN.; SMALLEST ID 0.502 IN. IN. 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.