NSN 4820-01-184-4100 · NIIN 011844100 · Part number C-050706A
William Powell Company, the Dba Powell Valve Div the Starflo Corporation · FSC 4820 — Valves, Nonpowered · FSG 48 — Valves · CAGE 48422
Government record, cited
NSN 4820-01-184-4100 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-184-4100. Manufacturer of record part number: C-050706A.
Bolt Circle Nominal Diameter: 3.120 INCHES ALL ENDS IN
Mounting Position: HORIZONTAL
Connection Type: FLANGE ALL ENDS
Style Designator: STRAIGHT THRU FLANGED ENDS
Identification
NSN: 4820-01-184-4100
NIIN: 011844100
FSC: 4820 — Valves, Nonpowered
FSG: 48 — Valves
Primary part number: C-050706A
Manufacturer: William Powell Company, the Dba Powell Valve Div the Starflo Corporation
General Description
The Valve,check, cataloged under National Stock Number 4820-01-184-4100, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is William Powell Company, the Dba Powell Valve Div the Starflo Corporation. Government technical data includes 21 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 12 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
Technical Specifications
Parameter
Value
NSN
4820-01-184-4100
Primary Part Number
C-050706A
Item Name
Valve,check
FSC / FSG
4820 / 48 — Valves, Nonpowered
Manufacturer
William Powell Company, the Dba Powell Valve Div the Starflo Corporation
Status
ACTIVE
Flow Control Device
DISK
Flange Shape
ROUND WITH HOLES ALL ENDS
Flange Face Design
RAISED STRAIGHT ALL ENDS
Bolt Circle Nominal Diameter
3.120 INCHES ALL ENDS IN
Mounting Position
HORIZONTAL
Connection Type
FLANGE ALL ENDS
Style Designator
STRAIGHT THRU FLANGED ENDS
Material Document and Classification
ASTM A105 ASSN STD SINGLE MATERIAL RESPONSE BODY
Bolt Hole Nominal Diameter
0.500 INCHES ALL ENDS IN
Operating Pressure
285.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
Valve Size
1.000 INCHES IN
Maximum Operating Temp
1000.0 FAHRENHEIT SINGLE RESPONSE DEGF
Nominal Outside Diameter
4.250 INCHES ALL ENDS IN
Bolt Hole Quantity
4 ALL ENDS
Face to Face Distance
5.000 INCHES IN
Media for Which Designed
WATER-OIL-GAS SINGLE RESPONSE
Material
STEEL UNS K03504 BODY
Raised Face Nominal Diameter
2.000 INCHES ALL ENDS IN
Valve Operation Method
AUTOMATIC
Raised Face Nominal Height
0.062 INCHES ALL ENDS IN
Nominal Thickness
0.560 INCHES ALL ENDS IN
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
⇄Related Items12
Each row states its source: a government interchangeability/replacement code, or a possible match on a shared part number.
NSN 4820-01-184-4100 is a Valve,check, manufactured by William Powell Company, the Dba Powell Valve Div the Starflo Corporation, classified under FSC 4820, Valves, Nonpowered. Status: active.
What part numbers are listed for NSN 4820-01-184-4100?
NSN 4820-01-184-4100 has 2 manufacturer part numbers on file: C-050706A (William Powell Company, the Dba Powell Valve Div the Starflo Corporation), 31FFS-1 (Newmans Inc New Jersey Div).
What NSN replaces 4820-01-184-4100?
12 possible matches (shared part number, not a government interchangeability claim): 4820-01-184-4552, 4820-01-185-2288, 4820-01-185-2379. Verify interchangeability with system specifications before substitution.
What are the specifications of C-050706A?
Key specifications for C-050706A: Flow Control Device: DISK; Flange Shape: ROUND WITH HOLES ALL ENDS; Flange Face Design: RAISED STRAIGHT ALL ENDS; Bolt Circle Nominal Diameter: 3.120 INCHES ALL ENDS IN. 21 specifications are documented in the U.S. Government catalog.
Is NSN 4820-01-184-4100 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.