PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

201G146Valve,primer

W S Darley & Co · NSN 4320-00-388-7790 · FSC 4320 · No Item Name Available
Verified by PartsTable
NSN 4320-00-388-7790 — this item is cataloged by the U.S. Government under National Stock Number 4320-00-388-7790. Primary manufacturer part number: 201G146.
Features
  • Valve,primer — FSC 4320
  • General Characteristics Item Description: BRASS,3.187 IN.LG,0.187 IN.DIA THREAD SIZE 10-24 IN
  • 3 verified cross-references
  • Primary manufacturer: W S Darley & Co
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
General Description

The Valve,primer, cataloged under National Stock Number 4320-00-388-7790, is classified within Federal Supply Class 4320 (No Item Name Available) of the Pumps and Compressors group. The primary manufacturer of record is W S Darley & Co. Government technical data includes 1 verified specification, sourced from the Federal Logistics Information System (FLIS). This item has 3 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: Cancelled.

Technical Specifications
ParameterValue
NSN4320-00-388-7790
Primary Part Number201G146
Item NameValve,primer
FSC / FSG4320 / 43 — No Item Name Available
ManufacturerW S Darley & Co
StatusCANCELLED
General Characteristics Item DescriptionBRASS,3.187 IN.LG,0.187 IN.DIA THREAD SIZE 10-24 IN
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 3
4310-00-919-6802PB201 INTERCHANGEABLE
Valve Assembly,exhaust
Altec Air, Llc Dba Altec Llc
5330-01-062-3166G-1-4-61 INTERCHANGEABLE
Gasket,register Fro
Todd Combustion Inc
5930-01-390-8902 INTERCHANGEABLE
Switch,push
Cross-Reference Index
Part NumberManufacturer
201G146 W S Darley & Co (USA)
G146-1 W S Darley & Co (USA)
PB201 Dakota Fire Apparatus Co Inc (USA)
Related Parts
4310-00-919-6802INTERCHANGEABLE
VALVE ASSEMBLY,EXHAUST
PB201
5330-01-062-3166INTERCHANGEABLE
GASKET,REGISTER FRO
G-1-4-61
5930-01-390-8902INTERCHANGEABLE
SWITCH,PUSH

Frequently Asked Questions

What is NSN 4320-00-388-7790?

NSN 4320-00-388-7790 is a Valve,primer, manufactured by W S Darley & Co, classified under FSC 4320 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 4320-00-388-7790?

NSN 4320-00-388-7790 has 3 cross-referenced part numbers: 201G146 (W S Darley & Co), G146-1 (W S Darley & Co), PB201 (Dakota Fire Apparatus Co Inc).

What NSN replaces 4320-00-388-7790?

There are 3 known substitutes for 4320-00-388-7790: 4310-00-919-6802, 5330-01-062-3166, 5930-01-390-8902. Verify interchangeability with system specifications before substitution.

What are the specifications of 201G146?

Key specifications for 201G146: General Characteristics Item Description: BRASS,3.187 IN.LG,0.187 IN.DIA THREAD SIZE 10-24 IN. 1 total characteristics are documented in the Federal Logistics Information System.

Is NSN 4320-00-388-7790 still in active supply?

NSN 4320-00-388-7790 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com