NSN 4820-01-186-0895 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-186-0895. Manufacturer of record part number: 820-303-021.
Also searched as4820-01-186-0895 ·
4820011860895 ·
NIIN 011860895 ·
01-186-0895 ·
FSC 4820 Valves, Nonpowered · CAGE 51729 · 820-303-021
Nearby stock numbers← 4820-01-186-0891
·
4820-01-186-0897 Parts Kit, Flange →
4820-01-186-0895 — Valves, Nonpowered
Features
Cylinder,valve Relief — FSC 4820
General Characteristics Item Description: IRON,CAST
1 manufacturer part number on file
Manufacturer of record: Dresser, Inc. Dba Dresser Roots Blowers & Compressors Div Dresser Roots
Identification
NSN: 4820-01-186-0895
NIIN: 011860895
FSC: 4820 — Valves, Nonpowered
FSG: 48 — Valves
Primary part number: 820-303-021
Manufacturer: Dresser, Inc. Dba Dresser Roots Blowers & Compressors Div Dresser Roots
General Description
The Cylinder,valve Relief, cataloged under National Stock Number 4820-01-186-0895, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Dresser, Inc. Dba Dresser Roots Blowers & Compressors Div Dresser Roots. Government technical data includes 1 specification, 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. Current acquisition status: Active.
Technical Specifications
Parameter
Value
NSN
4820-01-186-0895
Primary Part Number
820-303-021
Item Name
Cylinder,valve Relief
FSC / FSG
4820 / 48 — Valves, Nonpowered
Manufacturer
Dresser, Inc. Dba Dresser Roots Blowers & Compressors Div Dresser Roots
Dresser, Inc. Dba Dresser Roots Blowers & Compressors Div Dresser Roots (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
Frequently Asked Questions
What is NSN 4820-01-186-0895?
NSN 4820-01-186-0895 is a Cylinder,valve Relief, manufactured by Dresser, Inc. Dba Dresser Roots Blowers & Compressors Div Dresser Roots, classified under FSC 4820, Valves, Nonpowered. Status: active.
What part numbers are listed for NSN 4820-01-186-0895?
NSN 4820-01-186-0895 has 1 manufacturer part number on file: 820-303-021 (Dresser, Inc. Dba Dresser Roots Blowers & Compressors Div Dresser Roots).
What are the specifications of 820-303-021?
Key specifications for 820-303-021: General Characteristics Item Description: IRON,CAST. 1 specification is documented in the U.S. Government catalog.
Is NSN 4820-01-186-0895 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.