PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

50776Plunger,priming Valve

Waterous Company · NSN 4210-00-256-2855 · FSC 4210 · No Item Name Available
Verified by PartsTable
NSN 4210-00-256-2855 — this item is cataloged by the U.S. Government under National Stock Number 4210-00-256-2855. Primary manufacturer part number: 50776.
Features
  • Plunger,priming Valve — FSC 4210
  • General Characteristics Item Description: STEEL
  • 1 verified cross-reference
  • Primary manufacturer: Waterous Company
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
General Description

The Plunger,priming Valve, cataloged under National Stock Number 4210-00-256-2855, is classified within Federal Supply Class 4210 (No Item Name Available) of the Fire Fighting, Rescue, and Safety Equipment group. The primary manufacturer of record is Waterous Company. 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. 3 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4210-00-256-2855
Primary Part Number50776
Item NamePlunger,priming Valve
FSC / FSG4210 / 42 — No Item Name Available
ManufacturerWaterous Company
StatusACTIVE
General Characteristics Item DescriptionSTEEL
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 3
5210-00-466-0305224GRLZ INTERCHANGEABLE
Caliper,micrometer,outside
L.s. Starrett Company (the) Div Tool Division
5340-00-626-346650776 INTERCHANGEABLE
Clamp,loop
Eaton Aeroquip Llc Dba Jackson North 1 Div Fluid and Electrical Distribution
4730-01-134-143850776 INTERCHANGEABLE
Elbow
Allianz Sweeper Company
Cross-Reference Index
Part NumberManufacturer
50776 Waterous Company (USA)
Related Parts
5210-00-466-0305INTERCHANGEABLE
CALIPER,MICROMETER,OUTSIDE
224GRLZ
5340-00-626-3466INTERCHANGEABLE
CLAMP,LOOP
50776
4730-01-134-1438INTERCHANGEABLE
ELBOW
50776

Frequently Asked Questions

What is NSN 4210-00-256-2855?

NSN 4210-00-256-2855 is a Plunger,priming Valve, manufactured by Waterous Company, classified under FSC 4210 (No Item Name Available). Status: active.

What are the part numbers for NSN 4210-00-256-2855?

NSN 4210-00-256-2855 has 1 cross-referenced part number: 50776 (Waterous Company).

What NSN replaces 4210-00-256-2855?

There are 3 known substitutes for 4210-00-256-2855: 5210-00-466-0305, 5340-00-626-3466, 4730-01-134-1438. Verify interchangeability with system specifications before substitution.

What are the specifications of 50776?

Key specifications for 50776: End Item Identification: TRUCK,FIRE FIGHTING,FOAM AND WATER,MODELS BA/BAW/BAM/BAMW; General Characteristics Item Description: STEEL. 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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