PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

5603Valve,bypass

Kidde Inc Walter Kidde Div Portable Cylinder Opns · NSN 4210-00-398-5061 · FSC 4210 · No Item Name Available
Verified by PartsTable
NSN 4210-00-398-5061 — this item is cataloged by the U.S. Government under National Stock Number 4210-00-398-5061. Primary manufacturer part number: 5603.
Features
  • Valve,bypass — FSC 4210
  • General Characteristics Item Description: 1ST END,THD INT,0.500 IN.PIPE THD; 2ND END,THD EXT,0.500 IN.PIPE THD; 3RD END,0.625 IN.-20,UN,EXT THD IN
  • 2 verified cross-references
  • Primary manufacturer: Kidde Inc Walter Kidde Div Portable Cylinder Opns
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
General Description

The Valve,bypass, cataloged under National Stock Number 4210-00-398-5061, 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 Kidde Inc Walter Kidde Div Portable Cylinder Opns. Government technical data includes 1 verified specification, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4210-00-398-5061
Primary Part Number5603
Item NameValve,bypass
FSC / FSG4210 / 42 — No Item Name Available
ManufacturerKidde Inc Walter Kidde Div Portable Cylinder Opns
StatusACTIVE
General Characteristics Item Description1ST END,THD INT,0.500 IN.PIPE THD; 2ND END,THD EXT,0.500 IN.PIPE THD; 3RD END,0.625 IN.-20,UN,EXT THD IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
5999-00-230-1195R716 INTERCHANGEABLE
Clip,electrical
Dietzgen Corp
6695-00-252-7763 INTERCHANGEABLE
Light,instrument
5985-00-256-6746522-4491144 INTERCHANGEABLE
Guard,erecting Shea
Naval Ship Systems Command
3040-00-279-24921097-6982 INTERCHANGEABLE
Cylinder Assembly,actuating,line
Wheeler Fleet Solutions, Co.
5360-00-360-44898063275 INTERCHANGEABLE
Spring,helical,compression
General Motors Corp
6515-00-406-1286 INTERCHANGEABLE
Syringe,hypodermic
1620-00-829-76595603-5 INTERCHANGEABLE
Arm Assembly,torque,landing Gear
Goodrich Aerospace Canada Ltd
5975-00-933-7678 INTERCHANGEABLE
Junction Box
6525-01-217-55755-603 INTERCHANGEABLE
X-Ray Apparatus,radiographic,med
Defense Medical Standardization Board
5133-01-336-054256003 INTERCHANGEABLE
Countersink
Ultra Tool International Inc
Cross-Reference Index
Part NumberManufacturer
5603 Kidde Inc Walter Kidde Div Portable Cylinder Opns (USA)
5603 Kidde-Fenwal, Llc (USA)
Related Parts
5999-00-230-1195INTERCHANGEABLE
CLIP,ELECTRICAL
R716
6695-00-252-7763INTERCHANGEABLE
LIGHT,INSTRUMENT
5985-00-256-6746INTERCHANGEABLE
GUARD,ERECTING SHEA
522-4491144
3040-00-279-2492INTERCHANGEABLE
CYLINDER ASSEMBLY,ACTUATING,LINE
1097-6982
5360-00-360-4489INTERCHANGEABLE
SPRING,HELICAL,COMPRESSION
8063275
6515-00-406-1286INTERCHANGEABLE
SYRINGE,HYPODERMIC
1620-00-829-7659INTERCHANGEABLE
ARM ASSEMBLY,TORQUE,LANDING GEAR
5603-5
5975-00-933-7678INTERCHANGEABLE
JUNCTION BOX
6525-01-217-5575INTERCHANGEABLE
X-RAY APPARATUS,RADIOGRAPHIC,MED
5-603
5133-01-336-0542INTERCHANGEABLE
COUNTERSINK
56003
5365-01-423-0634INTERCHANGEABLE
RING,EXTERNALLY THREADED
5603
5305-01-513-7488INTERCHANGEABLE
SCREW,MACHINE
8036088

Frequently Asked Questions

What is NSN 4210-00-398-5061?

NSN 4210-00-398-5061 is a Valve,bypass, manufactured by Kidde Inc Walter Kidde Div Portable Cylinder Opns, classified under FSC 4210 (No Item Name Available). Status: active.

What are the part numbers for NSN 4210-00-398-5061?

NSN 4210-00-398-5061 has 2 cross-referenced part numbers: 5603 (Kidde Inc Walter Kidde Div Portable Cylinder Opns), 5603 (Kidde-Fenwal, Llc).

What NSN replaces 4210-00-398-5061?

There are 12 known substitutes for 4210-00-398-5061: 5999-00-230-1195, 6695-00-252-7763, 5985-00-256-6746 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 5603?

Key specifications for 5603: General Characteristics Item Description: 1ST END,THD INT,0.500 IN.PIPE THD; 2ND END,THD EXT,0.500 IN.PIPE THD; 3RD END,0.625 IN.-20,UN,EXT THD IN. 1 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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