The Valve,ball, cataloged under National Stock Number 4820-01-340-5760, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Huntington Ingalls Inc Div Newport News Shipbuilding. Government technical data includes 22 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-340-5760 |
| Primary Part Number | 255762 ASSY AT |
| Item Name | Valve,ball |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Huntington Ingalls Inc Div Newport News Shipbuilding |
| Status | ACTIVE |
| Flange Shape | ROUND WITH HOLES ALL ENDS |
| Flange Face Design | PLAIN ALL ENDS |
| Bolt Circle Nominal Diameter | 3.125 INCHES ALL ENDS IN |
| Connection Type | FLANGE ALL ENDS |
| Style Designator | STRAIGHT THRU FLANGED ENDS |
| Material Document and Classification | MIL-C-20159 TYPE 1 MIL SPEC SINGLE MATERIAL RESPONSE BODY |
| Material Document and Classification | MIL-C-20159 TYPE 1 MIL SPEC SINGLE MATERIAL RESPONSE STEM |
| Bolt Hole Nominal Diameter | 0.562 INCHES SECOND END IN |
| Bolt Hole Nominal Diameter | 0.531 INCHES FIRST END IN |
| Valve Size | 1.000 INCHES IN |
| Nominal Outside Diameter | 4.250 INCHES SECOND END IN |
| Nominal Outside Diameter | 4.500 INCHES FIRST END IN |
| Bolt Hole Quantity | 4 ALL ENDS |
| Face to Face Distance | 8.188 INCHES IN |
| Media for Which Designed | WATER, SALT SINGLE RESPONSE |
| Material | COPPER ALLOY 964 BODY |
| Material | PLASTIC ACETAL SEAT |
| Material | TITANIUM FLOW CONTROL DEVICE |
| Material | COPPER ALLOY 964 STEM |
| Valve Operation Method | MANUAL |
| Nominal Thickness | 0.781 INCHES SECOND END IN |
| Nominal Thickness | 0.750 INCHES FIRST END 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 |
|---|---|
| 255762 ASSY AT PRIMARY | Huntington Ingalls Inc Div Newport News Shipbuilding (USA) |
| Reference | Meaning |
|---|---|
| 255762 | D/9 Drawing number reference only Huntington Ingalls Inc Div Newport News Shipbuilding |
NSN 4820-01-340-5760 is a Valve,ball, manufactured by Huntington Ingalls Inc Div Newport News Shipbuilding, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-340-5760 has 1 manufacturer part number on file: 255762 ASSY AT (Huntington Ingalls Inc Div Newport News Shipbuilding).
Key specifications for 255762 ASSY AT: Flange Shape: ROUND WITH HOLES ALL ENDS; Flange Face Design: PLAIN ALL ENDS; Bolt Circle Nominal Diameter: 3.125 INCHES ALL ENDS IN; Connection Type: FLANGE ALL ENDS. 22 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.