PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

46-251Valve,flow Control

Quest Engineering Inc · NSN 4820-01-627-9620 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-01-627-9620 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-627-9620. Primary manufacturer part number: 46-251.
Features
  • Valve,flow Control — FSC 4820
  • 2 verified cross-references
  • Primary manufacturer: Quest Engineering Inc
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
General Description

The Valve,flow Control, cataloged under National Stock Number 4820-01-627-9620, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Quest Engineering Inc. This item has 2 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 3 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Catalog Facts
Item NameValve,flow Control
FSC / FSG4820 — No Item Name Available (FSG 48)
ManufacturersW S Darley & Co Div Darley Pump Division (CAGE 5B337); Quest Engineering Inc (CAGE 1W140)
Technical Specifications
ParameterValue
NSN4820-01-627-9620
Primary Part Number46-251
Item NameValve,flow Control
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerQuest Engineering Inc
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 3
5965-00-170-4793M-66/U INTERCHANGEABLE
Microphone,dynamic
Joint Electronics Type Designation System
5133-00-255-4077 INTERCHANGEABLE
Countersink
5930-01-373-940446251 INTERCHANGEABLE
Switch,pressure
Tyco Fire Products Lp
Cross-Reference Index
Part NumberManufacturer
5212700 W S Darley & Co Div Darley Pump Division (USA)
46-251 PRIMARY Quest Engineering Inc (USA)
Related Parts
5965-00-170-4793INTERCHANGEABLE
MICROPHONE,DYNAMIC
M-66/U
5133-00-255-4077INTERCHANGEABLE
COUNTERSINK
5930-01-373-9404INTERCHANGEABLE
SWITCH,PRESSURE
46251

Frequently Asked Questions

What is NSN 4820-01-627-9620?

NSN 4820-01-627-9620 is a Valve,flow Control, manufactured by Quest Engineering Inc, classified under FSC 4820 (No Item Name Available). Status: active.

What are the part numbers for NSN 4820-01-627-9620?

NSN 4820-01-627-9620 has 2 cross-referenced part numbers: 5212700 (W S Darley & Co Div Darley Pump Division), 46-251 (Quest Engineering Inc).

What NSN replaces 4820-01-627-9620?

There are 3 known substitutes for 4820-01-627-9620: 5965-00-170-4793, 5133-00-255-4077, 5930-01-373-9404. Verify interchangeability with system specifications before substitution.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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