PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

51950Plate,diaphragm

Grove Valve Operations · NSN 4820-00-381-3201 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-00-381-3201 — this item is cataloged by the U.S. Government under National Stock Number 4820-00-381-3201. Primary manufacturer part number: 51950.
Features
  • Plate,diaphragm — FSC 4820
  • General Characteristics Item Description: BRASS,2.297 IN.O/A DIA,0.156 IN.THK,30 DEG CHAMFERED SIDES,0.719 IN.DIA 0.172 IN.W GROOVE ONE SIDE IN
  • 1 verified cross-reference
  • Primary manufacturer: Grove Valve Operations
Applications
  • Flow control in piping systems
  • Water treatment infrastructure
  • Industrial process control
General Description

The Plate,diaphragm, cataloged under National Stock Number 4820-00-381-3201, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Grove Valve Operations. Government technical data includes 1 verified specification, 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: Cancelled.

Technical Specifications
ParameterValue
NSN4820-00-381-3201
Primary Part Number51950
Item NamePlate,diaphragm
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerGrove Valve Operations
StatusCANCELLED
General Characteristics Item DescriptionBRASS,2.297 IN.O/A DIA,0.156 IN.THK,30 DEG CHAMFERED SIDES,0.719 IN.DIA 0.172 IN.W GROOVE ONE SIDE IN
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 6
2805-00-354-082701950 INTERCHANGEABLE
Guide,valve Stem
Safeguard Powertech Systems
5305-00-575-711851950 INTERCHANGEABLE
Screw,special
Naval Inventory Control Point Mechanicsburg
5895-00-671-944951950 INTERCHANGEABLE
Tuner,radio Frequency
Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp Div Multiple
4330-01-021-001551950 INTERCHANGEABLE
Module,pressurization
Eaton Aerospace Llc Dba Eaton Aerospace Jackson
5330-01-087-703651950 INTERCHANGEABLE
Packing,preformed
Waterous Company
1340-01-443-547752105 INTERCHANGEABLE
Rocket and Launcher,83 Millimete
Nammo Defense Systems Inc. Dba Nammo Defense Systems Inc
Cross-Reference Index
Part NumberManufacturer
51950 PRIMARY Grove Valve Operations (USA)
Related Parts
2805-00-354-0827INTERCHANGEABLE
GUIDE,VALVE STEM
01950
5305-00-575-7118INTERCHANGEABLE
SCREW,SPECIAL
51950
5895-00-671-9449INTERCHANGEABLE
TUNER,RADIO FREQUENCY
51950
4330-01-021-0015INTERCHANGEABLE
MODULE,PRESSURIZATION
51950
5330-01-087-7036INTERCHANGEABLE
PACKING,PREFORMED
51950
1340-01-443-5477INTERCHANGEABLE
ROCKET AND LAUNCHER,83 MILLIMETE
52105

Frequently Asked Questions

What is NSN 4820-00-381-3201?

NSN 4820-00-381-3201 is a Plate,diaphragm, manufactured by Grove Valve Operations, classified under FSC 4820 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 4820-00-381-3201?

NSN 4820-00-381-3201 has 1 cross-referenced part number: 51950 (Grove Valve Operations).

What NSN replaces 4820-00-381-3201?

There are 6 known substitutes for 4820-00-381-3201: 2805-00-354-0827, 5305-00-575-7118, 5895-00-671-9449 and 3 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 51950?

Key specifications for 51950: General Characteristics Item Description: BRASS,2.297 IN.O/A DIA,0.156 IN.THK,30 DEG CHAMFERED SIDES,0.719 IN.DIA 0.172 IN.W GROOVE ONE SIDE IN. 1 total characteristics are documented in the Federal Logistics Information System.

Is NSN 4820-00-381-3201 still in active supply?

NSN 4820-00-381-3201 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.
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