The Valve,relief,pressure and Temper, cataloged under National Stock Number 4820-01-236-4408, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Pall Aeropower Corporation. Government technical data includes 18 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-236-4408 |
| Primary Part Number | AA-B126-1D36A |
| Item Name | Valve,relief,pressure and Temper |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Pall Aeropower Corporation |
| Status | ACTIVE |
| Flow Control Device | POPPET |
| Temp Rating | -50.0 FAHRENHEIT AND 275.0 FAHRENHEIT DEGF |
| Body Style | SINGLE CONNECTION ANGLE FLOW |
| First End Style Designator | GROOVED |
| Material Document and Classification | AISI 440C ASSN STD SINGLE MATERIAL RESPONSE FLOW CONTROL DEVICE |
| Material Document and Classification | AISI 440C ASSN STD SINGLE MATERIAL RESPONSE SEAT |
| Material Document and Classification | AMS 5640 ASSN STD SINGLE MATERIAL RESPONSE BODY |
| End Connection Quantity | 1 |
| Temp Control Device Type | FUSIBLE |
| First End Connection Type | UNTHREADED EXTERNAL TUBE |
| Temp Adjustability | NOT ADJUSTABLE |
| Surface Treatment | PASSIVATE OUTSIDE |
| First End Outside Diameter Tube Accommodated | 0.735 INCHES MINIMUM AND 0.736 INCHES MAXIMUM IN |
| Material | STEEL COMP 440A FLOW CONTROL DEVICE A |
| Material | STEEL COMP 440A SEAT A |
| Material | STEEL CORROSION RESISTING BODY |
| Media for Which Designed | HYDRAULIC FLUID, PHOSPHATE-ESTER BASE |
| Valve Discharge Flow Rate | 6.0 GALLONS PER MINUTE |
| 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 |
|---|---|
| AA-B126-1D36A PRIMARY | Pall Aeropower Corporation (USA) |
| A15HS056-1 | The Boeing Company (USA) |
NSN 4820-01-236-4408 is a Valve,relief,pressure and Temper, manufactured by Pall Aeropower Corporation, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-236-4408 has 2 manufacturer part numbers on file: AA-B126-1D36A (Pall Aeropower Corporation), A15HS056-1 (The Boeing Company).
Key specifications for AA-B126-1D36A: Flow Control Device: POPPET; Temp Rating: -50.0 FAHRENHEIT AND 275.0 FAHRENHEIT DEGF; Body Style: SINGLE CONNECTION ANGLE FLOW; First End Style Designator: GROOVED. 18 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 4820-01-236-4408 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.