Connection Style: EXTERNAL SEAT FOR GASKET SEAL (BOSS) SECOND END
Connection Type: THREADED EXTERNAL BOSS SECOND END
Style Designator: STRAIGHT THRU W/BAFFLE
Valve Size: 0.125 INCHES IN
Thread Direction: RIGHT-HAND SECOND END
Nominal Thread Size: 0.125 INCHES SECOND END IN
Thread Series Designator: NPT SECOND END
Identification
NSN: 4820-01-682-3389
NIIN: 016823389
FSC: 4820 — Valves, Nonpowered
FSG: 48 — Valves
General Description
The Valve,safety Relief, cataloged under National Stock Number 4820-01-682-3389, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. Government technical data includes 7 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
Technical Specifications
Parameter
Value
NSN
4820-01-682-3389
Item Name
Valve,safety Relief
FSC / FSG
4820 / 48 — Valves, Nonpowered
Status
ACTIVE
Connection Style
EXTERNAL SEAT FOR GASKET SEAL (BOSS) SECOND END
Connection Type
THREADED EXTERNAL BOSS SECOND END
Style Designator
STRAIGHT THRU W/BAFFLE
Valve Size
0.125 INCHES IN
Thread Direction
RIGHT-HAND SECOND END
Nominal Thread Size
0.125 INCHES SECOND END IN
Thread Series Designator
NPT SECOND END
Lifecycle & Compliance
Acquisition Status
ACTIVE
DEMIL Code
DEMIL A — No Demilitarization Required
Hazard
No hazard code in the DLA record (HMIC N)
Criticality Code
X
Cross-Reference Index
No manufacturer part numbers on file in the U.S. Government catalog.
Reference documents
Reference
Meaning
VRVH-4SAESS-V-500
3/9Design control — primary reference
U.S. Government activity
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
Frequently Asked Questions
What is NSN 4820-01-682-3389?
NSN 4820-01-682-3389 is a Valve,safety Relief, classified under FSC 4820, Valves, Nonpowered. Status: active.
What are the specifications of 4820-01-682-3389?
Key specifications for 4820-01-682-3389: Connection Style: EXTERNAL SEAT FOR GASKET SEAL (BOSS) SECOND END; Connection Type: THREADED EXTERNAL BOSS SECOND END; Style Designator: STRAIGHT THRU W/BAFFLE; Valve Size: 0.125 INCHES IN. 7 specifications are documented in the U.S. Government catalog.
Is NSN 4820-01-682-3389 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.