PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

B2255Disk,valve

Niantic Tool, Inc. Dba Niantic Tool Co · NSN 4820-01-278-0926 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-01-278-0926 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-278-0926. Primary manufacturer part number: B2255.
Features
  • Disk,valve — FSC 4820
  • 12 verified cross-references
  • Primary manufacturer: Niantic Tool, Inc. Dba Niantic Tool Co
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
General Description

The Disk,valve, cataloged under National Stock Number 4820-01-278-0926, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Niantic Tool, Inc. Dba Niantic Tool Co. This item has 12 commercial cross-references from 6 manufacturers, enabling identification through both NSN and commercial part number lookups. 9 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Catalog Facts
Item NameDisk,valve
FSC / FSG4820 — No Item Name Available (FSG 48)
ManufacturersSiemens Government Technologies, Inc. Dba Sgt Dresser-Rand Div Sgt Dresser-Rand (CAGE 0BR59); Dresser Rand Co Terry Corp Steam Turbine Motor and Generator Co a Joint Venture (CAGE 82328); Curtiss-Wright Electro-Mechanical Corp Dba Steam & Air Solutions Div Curtiss-Wright Steam and Air Solutions (CAGE 8FGX3); Curtiss-Wright Electro-Mechanical Corporation Dba Curtiss-Wright Steam and Air Solutions Div Steam and Air Solutions (CAGE 830Q4); Niantic Tool, Inc. Dba Niantic Tool Co (CAGE 0B5H6)
Technical Specifications
ParameterValue
NSN4820-01-278-0926
Primary Part NumberB2255
Item NameDisk,valve
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerNiantic Tool, Inc. Dba Niantic Tool Co
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 9
5310-00-020-4144BACN10MK3X45 INTERCHANGEABLE
Nut,self-Locking,plate
Republic Fastener Mfg. Corp. Dba Arconic Fastening Systems
6695-00-441-3600900021 INTERCHANGEABLE
Test Stand,demand Oxygen Regulat
Avox Systems Inc Dba Avox Systems Inc
3040-01-161-6560B-2255 INTERCHANGEABLE
Shaft,valve
Hunt Valve Company, Inc.
4820-01-282-4344B2299 INTERCHANGEABLE
Guide,valve Stem
Niantic Tool, Inc. Dba Niantic Tool Co
5310-01-296-0206900021 INTERCHANGEABLE
Nut,insert
Comrod Sweden Ab
5331-01-366-973390-0046 INTERCHANGEABLE
O-Ring
Dntlworks Equipment Corporation
4720-01-397-713090-0021 INTERCHANGEABLE
Hose Assembly,nonmetallic
Parker Hannifin Corporation Div Village Marine Tech
5999-01-466-446390002-1 INTERCHANGEABLE
Contact,electrical
Raytheon Company Div Rmd Strategic
3110-01-490-69806209-2RS1/C3LHT55 INTERCHANGEABLE
Bearing,ball,annular
Skf Usa Inc.
Cross-Reference Index
Part NumberManufacturer
B-3671 Siemens Government Technologies, Inc. Dba Sgt Dresser-Rand Div Sgt Dresser-Rand (USA)
B-3671 Dresser Rand Co Terry Corp Steam Turbine Motor and Generator Co a Joint Venture (USA)
B-3671 916672 Dresser Rand Co Terry Corp Steam Turbine Motor and Generator Co a Joint Venture (USA)
B-3671 Curtiss-Wright Electro-Mechanical Corp Dba Steam & Air Solutions Div Curtiss-Wright Steam and Air Solutions (USA)
916672 Siemens Government Technologies, Inc. Dba Sgt Dresser-Rand Div Sgt Dresser-Rand (USA)
916672 Curtiss-Wright Electro-Mechanical Corporation Dba Curtiss-Wright Steam and Air Solutions Div Steam and Air Solutions (USA)
B2255 PRIMARY Niantic Tool, Inc. Dba Niantic Tool Co (USA)
916672 Turbodyne Div of Dresser Industries Inc See Code 0br59 (USA)
916672 Curtiss-Wright Electro-Mechanical Corp Dba Steam & Air Solutions Div Curtiss-Wright Steam and Air Solutions (USA)
900021 PRIMARY Niantic Tool, Inc. Dba Niantic Tool Co (USA)
916672 PRIMARY Dresser Rand Co Terry Corp Steam Turbine Motor and Generator Co a Joint Venture (USA)
B-3671 Curtiss-Wright Electro-Mechanical Corporation Dba Curtiss-Wright Steam and Air Solutions Div Steam and Air Solutions (USA)
Related Parts
5310-00-020-4144INTERCHANGEABLE
NUT,SELF-LOCKING,PLATE
BACN10MK3X45
6695-00-441-3600INTERCHANGEABLE
TEST STAND,DEMAND OXYGEN REGULAT
900021
3040-01-161-6560INTERCHANGEABLE
SHAFT,VALVE
B-2255
4820-01-282-4344INTERCHANGEABLE
GUIDE,VALVE STEM
B2299
5310-01-296-0206INTERCHANGEABLE
NUT,INSERT
900021
5331-01-366-9733INTERCHANGEABLE
O-RING
90-0046
4720-01-397-7130INTERCHANGEABLE
HOSE ASSEMBLY,NONMETALLIC
90-0021
5999-01-466-4463INTERCHANGEABLE
CONTACT,ELECTRICAL
90002-1
3110-01-490-6980INTERCHANGEABLE
BEARING,BALL,ANNULAR
6209-2RS1/C3LHT55

Frequently Asked Questions

What is NSN 4820-01-278-0926?

NSN 4820-01-278-0926 is a Disk,valve, manufactured by Niantic Tool, Inc. Dba Niantic Tool Co, classified under FSC 4820 (No Item Name Available). Status: active.

What are the part numbers for NSN 4820-01-278-0926?

NSN 4820-01-278-0926 has 12 cross-referenced part numbers: B-3671 (Siemens Government Technologies, Inc. Dba Sgt Dresser-Rand Div Sgt Dresser-Rand), B-3671 (Dresser Rand Co Terry Corp Steam Turbine Motor and Generator Co a Joint Venture), B-3671 916672 (Dresser Rand Co Terry Corp Steam Turbine Motor and Generator Co a Joint Venture), B-3671 (Curtiss-Wright Electro-Mechanical Corp Dba Steam & Air Solutions Div Curtiss-Wright Steam and Air Solutions), 916672 (Siemens Government Technologies, Inc. Dba Sgt Dresser-Rand Div Sgt Dresser-Rand) and 7 more.

What NSN replaces 4820-01-278-0926?

There are 9 known substitutes for 4820-01-278-0926: 5310-00-020-4144, 6695-00-441-3600, 3040-01-161-6560 and 6 more. Verify interchangeability with system specifications before substitution.

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