The Diaphragm,actuator Valve,special, cataloged under National Stock Number 4820-01-451-1751, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Honeywell International, Inc Div Aerospace-Tucson. Government technical data includes 10 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-451-1751 |
| Primary Part Number | 136732-4 |
| Item Name | Diaphragm,actuator Valve,special |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Honeywell International, Inc Div Aerospace-Tucson |
| Status | ACTIVE |
| Outside Diameter | 8.250 INCHES NOMINAL IN |
| Supplementary Features | ADDITIONAL MATERIAL: CLOTH |
| Taper Minor Diameter | 6.750 INCHES NOMINAL IN |
| Style Designator | SPECIAL SHAPED |
| Taper Major Diameter | 7.500 INCHES NOMINAL IN |
| Material Thickness | 0.090 INCHES NOMINAL IN |
| Bolt Hole Quantity | 36 |
| Bolt Circle Diameter | 6.375 INCHES MINIMUM AND 8.000 INCHES MAXIMUM IN |
| Material | RUBBER SILICONE |
| Hole Diameter | 0.109 INCHES NOMINAL IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL Q — CCL Item — Commerce Control List |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 136732-4 PRIMARY | Honeywell International, Inc Div Aerospace-Tucson (USA) |
| Reference | Meaning |
|---|---|
| 136732 | D/9 Drawing number reference only Honeywell International, Inc Div Aerospace-Tucson |
NSN 4820-01-451-1751 is a Diaphragm,actuator Valve,special, manufactured by Honeywell International, Inc Div Aerospace-Tucson, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-451-1751 has 1 manufacturer part number on file: 136732-4 (Honeywell International, Inc Div Aerospace-Tucson).
1 possible match (shared part number, not a government interchangeability claim): 2540-01-506-7208. Verify interchangeability with system specifications before substitution.
Key specifications for 136732-4: Overall Height: 1.422 INCHES NOMINAL IN; Outside Diameter: 8.250 INCHES NOMINAL IN; Supplementary Features: ADDITIONAL MATERIAL: CLOTH; Taper Minor Diameter: 6.750 INCHES NOMINAL IN. 10 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.
NSN 4820-01-451-1751 has DEMIL Code Q. Demilitarization may be required before disposal or transfer to non-military entities.
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.