The Diaphragm,actuator Valve,special, cataloged under National Stock Number 4820-01-074-5108, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Hamworthy Inc.. Government technical data includes 8 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-074-5108 |
| Primary Part Number | B90050FC020 |
| Item Name | Diaphragm,actuator Valve,special |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Hamworthy Inc. |
| Status | ACTIVE |
| Outside Diameter | 3.012 INCHES NOMINAL IN |
| Taper Minor Diameter | 2.250 INCHES NOMINAL IN |
| Style Designator | SPECIAL SHAPED |
| Taper Major Diameter | 3.125 INCHES NOMINAL IN |
| Material Thickness | 0.128 INCHES NOMINAL IN |
| Center Hole Diameter | 0.542 INCHES NOMINAL IN |
| Media for Which Designed | AIR |
| Material | RUBBER |
| 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 |
|---|---|
| B90050FC020 PRIMARY | Hamworthy Inc. (USA) |
| H90077A001ITEM1A | Hamworthy Inc. (USA) |
| Reference | Meaning |
|---|---|
| 3-250-CBJ-1 | 5/9 Secondary reference Bellofram Corporation |
| H90077A001ITEM1A | 5/9 Secondary reference U.S. Government activity |
| D90050FC020 | 5/9 Secondary reference U.S. Government activity |
| B90050FC020 | 5/9 Secondary reference U.S. Government activity |
NSN 4820-01-074-5108 is a Diaphragm,actuator Valve,special, manufactured by Hamworthy Inc., classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-074-5108 has 2 manufacturer part numbers on file: B90050FC020 (Hamworthy Inc.), H90077A001ITEM1A (Hamworthy Inc.).
Key specifications for B90050FC020: Overall Height: 2.500 INCHES NOMINAL IN; Outside Diameter: 3.012 INCHES NOMINAL IN; Taper Minor Diameter: 2.250 INCHES NOMINAL IN; Style Designator: SPECIAL SHAPED. 8 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.