PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

V33Diaphragm,actuator Valve,special

Gast Mfg Corp · NSN 4820-00-781-4951 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-00-781-4951 — this item is cataloged by the U.S. Government under National Stock Number 4820-00-781-4951. Primary manufacturer part number: V33.
Features
  • Diaphragm,actuator Valve,special — FSC 4820
  • Style Designator: SPECIAL SHAPED
  • Material: PLASTIC
  • 1 verified cross-reference
  • Primary manufacturer: Gast Mfg Corp
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
  • Applications requiring Plastic construction
General Description

The Diaphragm,actuator Valve,special, cataloged under National Stock Number 4820-00-781-4951, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Gast Mfg Corp. Government technical data includes 2 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 1 commercial cross-reference from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 6 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4820-00-781-4951
Primary Part NumberV33
Item NameDiaphragm,actuator Valve,special
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerGast Mfg Corp
StatusACTIVE
Style DesignatorSPECIAL SHAPED
MaterialPLASTIC
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 6
3030-00-269-9715190203 INTERCHANGEABLE
Belt,v
Dresser, Llc
4730-00-317-3814 INTERCHANGEABLE
Fitting,meter,oil V
5961-00-983-7158V33 INTERCHANGEABLE
Semiconductor Device,diode
Micro-Metrics, Inc. Dba Aeroflex / Metelics - East Div Londonderry Operations
4240-01-250-9128V33 INTERCHANGEABLE
Air Entry,respirator
E. D. Bullard Company Dba Ed Bullard Co
4820-01-294-5843 INTERCHANGEABLE
Valve,rotary,selector
6520-01-361-689624-310 INTERCHANGEABLE
Tip,evacuator,dental
Pascal Co, Inc
Cross-Reference Index
Part NumberManufacturer
V33 PRIMARY Gast Mfg Corp (USA)
Related Parts
3030-00-269-9715INTERCHANGEABLE
BELT,V
190203
4730-00-317-3814INTERCHANGEABLE
FITTING,METER,OIL V
5961-00-983-7158INTERCHANGEABLE
SEMICONDUCTOR DEVICE,DIODE
V33
4240-01-250-9128INTERCHANGEABLE
AIR ENTRY,RESPIRATOR
V33
4820-01-294-5843INTERCHANGEABLE
VALVE,ROTARY,SELECTOR
6520-01-361-6896INTERCHANGEABLE
TIP,EVACUATOR,DENTAL
24-310

Frequently Asked Questions

What is NSN 4820-00-781-4951?

NSN 4820-00-781-4951 is a Diaphragm,actuator Valve,special, manufactured by Gast Mfg Corp, classified under FSC 4820 (No Item Name Available). Status: active.

What are the part numbers for NSN 4820-00-781-4951?

NSN 4820-00-781-4951 has 1 cross-referenced part number: V33 (Gast Mfg Corp).

What NSN replaces 4820-00-781-4951?

There are 6 known substitutes for 4820-00-781-4951: 3030-00-269-9715, 4730-00-317-3814, 5961-00-983-7158 and 3 more. Verify interchangeability with system specifications before substitution.

What are the specifications of V33?

Key specifications for V33: Style Designator: SPECIAL SHAPED; Material: PLASTIC. 2 total characteristics are documented in the Federal Logistics Information System.

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