The Valve,safety Relief, cataloged under National Stock Number 4820-01-100-3408, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Honeywell Aerospace Yeovil Div Aerospace -Yeovil. Government technical data includes 14 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through both NSN and commercial part number lookups. 7 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4820-01-100-3408 |
| Primary Part Number | 9169Y480 |
| Item Name | Valve,safety Relief |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Honeywell Aerospace Yeovil Div Aerospace -Yeovil |
| Status | ACTIVE |
| Flow Control Device | POPPETPOPPET |
| Connection Style | PLAIN (PIPE) FIRST ENDPLAIN (PIPE) FIRST END |
| Criticality Code Justification | ZZZYZZZY |
| Connection Type | THREADED EXTERNAL PIPE FIRST ENDTHREADED EXTERNAL PIPE FIRST END |
| Style Designator | STRAIGHT THRU NOTE: TO BE USED FOR VALVE BODIES OF ONE SECTION ONLY.STRAIGHT THRU NOTE: TO BE USED FOR VALVE BODIES OF ONE SECTION ONLY. |
| Adjustable Pressure Range | +150.0 TO 350.0 POUNDS PER SQUARE INCH+150.0 TO 350.0 POUNDS PER SQUARE INCH LBS |
| Thread Direction | RIGHT-HAND FIRST ENDRIGHT-HAND FIRST END |
| Nominal Thread Size | 0.500 INCHES FIRST END0.500 INCHES FIRST END IN |
| Disk Loading Method | SPRINGSPRING |
| Material | COPPER ALLOY OVERALL |
| Thread Series Designator | NPT FIRST ENDNPT FIRST END |
| Valve Discharge Flow Rate | 12.0 GALLONS PER MINUTE12.0 GALLONS PER MINUTE |
| Valve Operation Method | AUTOMATICAUTOMATIC |
| Reference Number Differentiating Characteristics | MATERIAL WILL BE IN ACCORDANCE WITH NAVICP MECH; ACTIVITY HX QUALITY CONTROL, MANUFACTURING AND TESTING SPECIFICATIONS.MATERIAL WILL BE IN ACCORDANCE WITH NAVICP MECH; ACTIVITY HX QUALITY CONTROL, MANUFACTURING AND TESTING SPECIFICATIONS. |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL F — Mutilate — Cut |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | Y |
| Part Number | Manufacturer |
|---|---|
| 9169Y480 | Honeywell Aerospace Yeovil Div Aerospace -Yeovil (GBR) |
| Reference | Meaning |
|---|---|
| B-8CPA2-XXX | 5/9 Secondary reference Nupro Co |
| B-8CPA2-XXX | 5/1 Secondary reference Swagelok Co |
| D7059 | 5/9 Secondary reference Ministry of Defence, De&s Underwater and Electronic Warfare Pt (uew Ipt) |
| B-8CPA2-150 | 5/9 Secondary reference Nupro Co |
| B-8CPAZ-XXX | 5/9 Secondary reference Nupro Co |
| B-8CPAZ-XXX | 3/1 Design control — primary reference Swagelok Co |
| B-8CPA2-150 | 5/1 Secondary reference Swagelok Co |
NSN 4820-01-100-3408 is a Valve,safety Relief, manufactured by Honeywell Aerospace Yeovil Div Aerospace -Yeovil, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-100-3408 has 1 manufacturer part number on file: 9169Y480 (Honeywell Aerospace Yeovil Div Aerospace -Yeovil).
1 possible match (shared part number, not a government interchangeability claim): 5360-01-209-6071. Verify interchangeability with system specifications before substitution.
Key specifications for 9169Y480: Flow Control Device: POPPETPOPPET; Connection Style: PLAIN (PIPE) FIRST ENDPLAIN (PIPE) FIRST END; Criticality Code Justification: ZZZYZZZY; Connection Type: THREADED EXTERNAL PIPE FIRST ENDTHREADED EXTERNAL PIPE FIRST END. 14 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 4820-01-100-3408 has DEMIL Code F. 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.