NSN 4820-01-676-9109 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-676-9109. Manufacturer of record part number: 55F, 1/2" 20 TO 200.
Also searched as4820-01-676-9109 ·
4820016769109 ·
NIIN 016769109 ·
01-676-9109 ·
FSC 4820 Valves, Nonpowered · CAGE 2P178 · 55F, 1/2" 20 TO 200
Operating Pressure: 200.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
Valve Size: 0.500 INCHES IN
Maximum Operating Temp: 180.0 FAHRENHEIT SINGLE RESPONSE DEGF
Second Connection Face to Centerline Distance: 1.75 INCHES IN
Face to Face Distance: 3.50 INCHES IN
First Connection Face to Centerline Distance: 1.75 INCHES IN
Valve Operation Method: MANUAL
Identification
NSN: 4820-01-676-9109
NIIN: 016769109
FSC: 4820 — Valves, Nonpowered
FSG: 48 — Valves
Primary part number: 55F, 1/2" 20 TO 200
Manufacturer: Cla-Val Co
General Description
The Valve,safety Relief, cataloged under National Stock Number 4820-01-676-9109, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Cla-Val Co. Government technical data includes 7 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
4820-01-676-9109
Primary Part Number
55F, 1/2" 20 TO 200
Item Name
Valve,safety Relief
FSC / FSG
4820 / 48 — Valves, Nonpowered
Manufacturer
Cla-Val Co
Status
ACTIVE
Operating Pressure
200.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
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 4820-01-676-9109?
NSN 4820-01-676-9109 is a Valve,safety Relief, manufactured by Cla-Val Co, classified under FSC 4820, Valves, Nonpowered. Status: active.
What part numbers are listed for NSN 4820-01-676-9109?
NSN 4820-01-676-9109 has 1 manufacturer part number on file: 55F, 1/2" 20 TO 200 (Cla-Val Co).
What are the specifications of 55F, 1/2" 20 TO 200?
Key specifications for 55F, 1/2" 20 TO 200: Operating Pressure: 200.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS; Valve Size: 0.500 INCHES IN; Maximum Operating Temp: 180.0 FAHRENHEIT SINGLE RESPONSE DEGF; Second Connection Face to Centerline Distance: 1.75 INCHES IN. 7 specifications are documented in the U.S. Government catalog.
Is NSN 4820-01-676-9109 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.