NSN 4820-01-643-0276 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-643-0276. Manufacturer of record part number: ASP-3SCH.
Operating Pressure: 300.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
Maximum Operating Temp: 300.0 FAHRENHEIT SINGLE RESPONSE DEGF
Media for Which Designed: GAS, INERT SECOND RESPONSE
Media for Which Designed: AIR FIRST RESPONSE
Material: COPPER ALLOY BODY
Valve Operation Method: MANUAL
Identification
NSN: 4820-01-643-0276
NIIN: 016430276
FSC: 4820 — Valves, Nonpowered
FSG: 48 — Valves
Primary part number: ASP-3SCH
Manufacturer: Arrow Pneumatics Inc
General Description
The Valve,safety Relief, cataloged under National Stock Number 4820-01-643-0276, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Arrow Pneumatics Inc. Government technical data includes 7 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.
Technical Specifications
Parameter
Value
NSN
4820-01-643-0276
Primary Part Number
ASP-3SCH
Item Name
Valve,safety Relief
FSC / FSG
4820 / 48 — Valves, Nonpowered
Manufacturer
Arrow Pneumatics Inc
Status
ACTIVE
Style Designator
SCREW-IN CARTRIDGE
Operating Pressure
300.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
4820-00-000-0097
4820-00-000-0097 · Item name not on file
4820-00-001-0010
VALVE,ROTARY,SELECTOR
4820-00-001-0020
4820-00-001-0020 · Item name not on file
4820-00-001-0021
4820-00-001-0021 · Item name not on file
4820-00-001-0032
4820-00-001-0032 · Item name not on file
4820-00-001-0037
VALVE,SAFETY RELIEF
4820-00-001-0042
4820-00-001-0042 · Item name not on file
4820-00-001-1230
4820-00-001-1230 · Item name not on file
Frequently Asked Questions
What is NSN 4820-01-643-0276?
NSN 4820-01-643-0276 is a Valve,safety Relief, manufactured by Arrow Pneumatics Inc, classified under FSC 4820, Valves, Nonpowered. Status: active.
What part numbers are listed for NSN 4820-01-643-0276?
NSN 4820-01-643-0276 has 2 manufacturer part numbers on file: ASP-3SCH (Arrow Pneumatics Inc), 9834K43 (Mcmaster-Carr Supply Co).
What are the specifications of ASP-3SCH?
Key specifications for ASP-3SCH: Style Designator: SCREW-IN CARTRIDGE; Operating Pressure: 300.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS; Maximum Operating Temp: 300.0 FAHRENHEIT SINGLE RESPONSE DEGF; Special Features: REDUCE NOISE BY 17-20 DB,TRAP PARTICLES DOWN TO 40 MICRON DB. 7 specifications are documented in the U.S. Government catalog.
Is NSN 4820-01-643-0276 hazardous material?
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
Sources
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.
✓ Data cited from the U.S. Government catalog; commercial cross-references from OEM and certified industry sources.