NSN 4820-01-457-5860 · NIIN 014575860 · Part number VR4125BR
Air Systems International, Inc. (used in VA by: Air Systems, Inc.) Dba Air Systems International Inc · FSC 4820 — Valves, Nonpowered · FSG 48 — Valves · CAGE 42905
Government record, cited
NSN 4820-01-457-5860 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-457-5860. Manufacturer of record part number: VR4125BR.
Opening Pressure Setting: 125.0 POUNDS PER SQUARE INCH LBS
Valve Operation Method: AUTOMATIC
2 manufacturer part numbers on file
Manufacturer of record: Air Systems International, Inc. (used in VA by: Air Systems, Inc.) Dba Air Systems International Inc
Identification
NSN: 4820-01-457-5860
NIIN: 014575860
FSC: 4820 — Valves, Nonpowered
FSG: 48 — Valves
Primary part number: VR4125BR
Manufacturer: Air Systems International, Inc. (used in VA by: Air Systems, Inc.) Dba Air Systems International Inc
General Description
The Valve,safety Relief, cataloged under National Stock Number 4820-01-457-5860, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Air Systems International, Inc. (used in VA by: Air Systems, Inc.) Dba Air Systems International Inc. Government technical data includes 2 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
4820-01-457-5860
Primary Part Number
VR4125BR
Item Name
Valve,safety Relief
FSC / FSG
4820 / 48 — Valves, Nonpowered
Manufacturer
Air Systems International, Inc. (used in VA by: Air Systems, Inc.) Dba Air Systems International Inc
Air Systems International, Inc. (used in VA by: Air Systems, Inc.) Dba Air Systems International Inc (USA)
No interchangeability data on file.
Other items in FSC 4820 — Valves, Nonpowered
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
Related Parts in Valves
4820-00-000-0097
4820-00-000-0097 · Item name not on file
4820-00-001-0010
VALVE,ROTARY,SELECTOR
8171E-1/4HS2
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
D559A3M2
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 4820-01-457-5860?
NSN 4820-01-457-5860 is a Valve,safety Relief, manufactured by Air Systems International, Inc. (used in VA by: Air Systems, Inc.) Dba Air Systems International Inc, classified under FSC 4820, Valves, Nonpowered. Status: active.
What part numbers are listed for NSN 4820-01-457-5860?
NSN 4820-01-457-5860 has 2 manufacturer part numbers on file: VR4125BR (Air Systems International, Inc. (used in VA by: Air Systems, Inc.) Dba Air Systems International Inc), BB100NNS26 ITEM 31 (Air Systems International, Inc. (used in VA by: Air Systems, Inc.) Dba Air Systems International Inc).
What are the specifications of VR4125BR?
Key specifications for VR4125BR: End Item Identification: LOS ANGELES CLASS SSN(688); Opening Pressure Setting: 125.0 POUNDS PER SQUARE INCH LBS; Valve Operation Method: AUTOMATIC. 2 specifications are documented in the U.S. Government catalog.
Is NSN 4820-01-457-5860 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.