NSN 4820-01-299-8439 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-299-8439. Manufacturer of record part number: 99187G001.
The Valve,safety Relief, cataloged under National Stock Number 4820-01-299-8439, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Jaeco Fluid Systems, Inc Dba Jaeco-Stewart. Government technical data includes 4 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
C/1Advisory reference — outside the item-of-supply concept
Jaeco Fluid Systems, Inc Dba Jaeco-Stewart
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 4820-01-299-8439?
NSN 4820-01-299-8439 is a Valve,safety Relief, manufactured by Jaeco Fluid Systems, Inc Dba Jaeco-Stewart, classified under FSC 4820, Valves, Nonpowered. Status: active.
What part numbers are listed for NSN 4820-01-299-8439?
NSN 4820-01-299-8439 has 1 manufacturer part number on file: 99187G001 (Jaeco Fluid Systems, Inc Dba Jaeco-Stewart).
What are the specifications of 99187G001?
Key specifications for 99187G001: Flow Control Device: DISK; Material: BRONZE BODY; Opening Pressure Setting: 50.0 POUNDS PER SQUARE INCH LBS; Valve Operation Method: AUTOMATIC. 4 specifications are documented in the U.S. Government catalog.
Is NSN 4820-01-299-8439 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.