The Valve,diaphragm,stop, cataloged under National Stock Number 4820-00-074-5311, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Diamond Power International, Inc.. Government technical data includes 9 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-00-074-5311 |
| Primary Part Number | 301757-1039 |
| Item Name | Valve,diaphragm,stop |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Diamond Power International, Inc. |
| Status | ACTIVE |
| Connection Style | PLAIN,OPTIONAL END(PIPE) ALL ENDS |
| Style Designator | STRAIGHT THRU W/OFFSET |
| Offset Distance | 1.000 INCHES IN |
| Thread Direction | RIGHT-HAND ALL ENDS |
| Nominal Thread Size | 0.500 INCHES ALL ENDS IN |
| Material | STEEL COMP 416 STEM |
| Material | ALUMINUM ALLOY BODY |
| Thread Series Designator | NPT ALL ENDS |
| Valve Operation Method | AUTOMATIC OR MANUAL |
| 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 |
|---|---|
| 301757-1039 PRIMARY | Diamond Power International, Inc. (USA) |
| 312853-1047 PIECE 35 PRIMARY | Diamond Power International, Inc. (USA) |
| Reference | Meaning |
|---|---|
| 301757-1039 | 5/9 Secondary reference Diamond Electronics Inc |
| 301757-1039 | 5/9 Secondary reference The Babcock & Wilcox Company Dba B & W Service Co Div B&w Service Company |
| 301757-1039 | C/1 Advisory reference — outside the item-of-supply concept Babcock & Wilcox Co |
NSN 4820-00-074-5311 is a Valve,diaphragm,stop, manufactured by Diamond Power International, Inc., classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-00-074-5311 has 2 manufacturer part numbers on file: 301757-1039 (Diamond Power International, Inc.), 312853-1047 PIECE 35 (Diamond Power International, Inc.).
Key specifications for 301757-1039: Connection Style: PLAIN,OPTIONAL END(PIPE) ALL ENDS; Style Designator: STRAIGHT THRU W/OFFSET; Offset Distance: 1.000 INCHES IN; Thread Direction: RIGHT-HAND ALL ENDS. 9 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.