NSN 4820-01-280-3953 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-280-3953. Manufacturer of record part number: 451623.
Also searched as4820-01-280-3953 ·
4820012803953 ·
NIIN 012803953 ·
01-280-3953 ·
FSC 4820 Valves, Nonpowered · CAGE 07524 · 451623
Operating Pressure: 110.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
Bonnet Type: INSIDE SCREW
Media for Which Designed: FUEL/OIL, HYDROCARBON SINGLE RESPONSE
Material: IRON BODY
Valve Operation Method: AUTOMATIC
1 manufacturer part number on file
Identification
NSN: 4820-01-280-3953
NIIN: 012803953
FSC: 4820 — Valves, Nonpowered
FSG: 48 — Valves
Primary part number: 451623
Manufacturer: Dover Pumps & Process Solutions Segment Inc Dba Blackmer Div Blackmer
General Description
The Valve,safety Relief, cataloged under National Stock Number 4820-01-280-3953, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Dover Pumps & Process Solutions Segment Inc Dba Blackmer Div Blackmer. Government technical data includes 6 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. Current acquisition status: Active.
Technical Specifications
Parameter
Value
NSN
4820-01-280-3953
Primary Part Number
451623
Item Name
Valve,safety Relief
FSC / FSG
4820 / 48 — Valves, Nonpowered
Manufacturer
Dover Pumps & Process Solutions Segment Inc Dba Blackmer Div Blackmer
Status
ACTIVE
Flow Control Device
POPPET
Operating Pressure
110.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
Dover Pumps & Process Solutions Segment Inc Dba Blackmer Div Blackmer (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 4820-01-280-3953?
NSN 4820-01-280-3953 is a Valve,safety Relief, manufactured by Dover Pumps & Process Solutions Segment Inc Dba Blackmer Div Blackmer, classified under FSC 4820, Valves, Nonpowered. Status: active.
What part numbers are listed for NSN 4820-01-280-3953?
NSN 4820-01-280-3953 has 1 manufacturer part number on file: 451623 (Dover Pumps & Process Solutions Segment Inc Dba Blackmer Div Blackmer).
What are the specifications of 451623?
Key specifications for 451623: Flow Control Device: POPPET; Operating Pressure: 110.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS; Bonnet Type: INSIDE SCREW; Special Features: TX-21/2,PUMP TRUCK FUELING. 6 specifications are documented in the U.S. Government catalog.
Is NSN 4820-01-280-3953 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.