The Diaphragm,actuator Valve,special, cataloged under National Stock Number 4820-01-237-9781, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Bellofram Corporation. Government technical data includes 5 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-237-9781 |
| Primary Part Number | 3-87-32BAJ |
| Item Name | Diaphragm,actuator Valve,special |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Bellofram Corporation |
| Status | ACTIVE |
| Outside Diameter | 1.182 INCHES NOMINAL IN |
| Taper Minor Diameter | 0.750 INCHES NOMINAL IN |
| Taper Major Diameter | 0.870 INCHES NOMINAL IN |
| Material Thickness | 0.195 INCHES MINIMUM AND 0.205 INCHES MAXIMUM IN |
| 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 |
|---|---|
| 1131143G1 | L3harris Technologies, Inc. Dba Harris Corporation (USA) |
| 3-87-32BAJ PRIMARY | Bellofram Corporation (USA) |
| Reference | Meaning |
|---|---|
| 1131143G1 | 7/9 Vendor item drawing reference Itt Industries Inc Itt Aerospace Communications Div East |
NSN 4820-01-237-9781 is a Diaphragm,actuator Valve,special, manufactured by Bellofram Corporation, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-237-9781 has 2 manufacturer part numbers on file: 1131143G1 (L3harris Technologies, Inc. Dba Harris Corporation), 3-87-32BAJ (Bellofram Corporation).
Key specifications for 3-87-32BAJ: Overall Height: 0.320 INCHES NOMINAL IN; Outside Diameter: 1.182 INCHES NOMINAL IN; Taper Minor Diameter: 0.750 INCHES NOMINAL IN; Taper Major Diameter: 0.870 INCHES NOMINAL IN. 5 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.