The Diaphragm,actuator Valve,special, cataloged under National Stock Number 4820-01-082-9322, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Kit Pack Co., Inc.. Government technical data includes 9 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4820-01-082-9322 |
| Primary Part Number | 21535-2 |
| Item Name | Diaphragm,actuator Valve,special |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Kit Pack Co., Inc. |
| Status | ACTIVE |
| Bead Diameter | 1.313 INCHES NOMINAL IN |
| Material Thickness | 0.035 INCHES NOMINAL IN |
| Bolt Hole Quantity | 4 |
| Center to Center Distance Between Bolt Holes Along Length | 1.453 INCHES NOMINAL IN |
| Center to Center Distance Between Bolt Holes Along Width | 1.453 INCHES NOMINAL IN |
| Center Hole Diameter | 0.250 INCHES NOMINAL IN |
| Outside Corner Radius | 0.266 INCHES NOMINAL IN |
| Material | RUBBER |
| Hole Diameter | 0.219 INCHES NOMINAL 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 |
|---|---|
| 21535-2 PRIMARY | Kit Pack Co., Inc. (USA) |
| Reference | Meaning |
|---|---|
| 21535-2 | 5/9 Secondary reference Triumph Thermal Systems - Maryland, Inc. |
| 21535-2 | C/1 Advisory reference — outside the item-of-supply concept Defense & Development Enterprises Llc |
NSN 4820-01-082-9322 is a Diaphragm,actuator Valve,special, manufactured by Kit Pack Co., Inc., classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-082-9322 has 1 manufacturer part number on file: 21535-2 (Kit Pack Co., Inc.).
1 possible match (shared part number, not a government interchangeability claim): 5310-01-422-5801. Verify interchangeability with system specifications before substitution.
Key specifications for 21535-2: Bead Diameter: 1.313 INCHES NOMINAL IN; Overall Length: 2.000 INCHES NOMINAL IN; Overall Width: 2.000 INCHES NOMINAL IN; Material Thickness: 0.035 INCHES NOMINAL IN. 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.