PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

295902E MK30-5Diaphragm,actuator Valve,special

The Babcock & Wilcox Company Dba B & W Service Co Div B&w Service Company · NSN 4820-01-234-3671 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-01-234-3671 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-234-3671. Primary manufacturer part number: 295902E MK30-5.
Features
  • Diaphragm,actuator Valve,special — FSC 4820
  • Criticality Code Justification: ZZZY
  • Outside Diameter: 7.229 INCHES MINIMUM AND 7.239 INCHES MAXIMUM IN
  • Style Designator: SPECIAL SHAPED
  • Reference Number Differentiating Characteristics: MATERIAL WILL BE IN ACCORDANCE WITH SHIPS PARTS CONTROL CENTER ACTIVITY HX QUALITY CONTROL,MANUFACTURING AND TESTING SPECIFICATIONS
  • Material Thickness: 5.969 INCHES MINIMUM AND 6.031 INCHES MAXIMUM IN
  • 3 verified cross-references
  • Primary manufacturer: The Babcock & Wilcox Company Dba B & W Service Co Div B&w Service Company
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
General Description

The Diaphragm,actuator Valve,special, cataloged under National Stock Number 4820-01-234-3671, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is The Babcock & Wilcox Company Dba B & W Service Co Div B&w Service Company. Government technical data includes 5 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 3 commercial cross-references from 3 manufacturers, enabling identification through both NSN and commercial part number lookups. 1 verified substitute exists in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4820-01-234-3671
Primary Part Number295902E MK30-5
Item NameDiaphragm,actuator Valve,special
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerThe Babcock & Wilcox Company Dba B & W Service Co Div B&w Service Company
StatusACTIVE
Criticality Code JustificationZZZY
Outside Diameter7.229 INCHES MINIMUM AND 7.239 INCHES MAXIMUM IN
Style DesignatorSPECIAL SHAPED
Reference Number Differentiating CharacteristicsMATERIAL WILL BE IN ACCORDANCE WITH SHIPS PARTS CONTROL CENTER ACTIVITY HX QUALITY CONTROL,MANUFACTURING AND TESTING SPECIFICATIONS
Material Thickness5.969 INCHES MINIMUM AND 6.031 INCHES MAXIMUM IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 1
4470-00-995-0693 INTERCHANGEABLE
Diaphragm
Cross-Reference Index
Part NumberManufacturer
295902E MK30-5 The Babcock & Wilcox Company Dba B & W Service Co Div B&w Service Company (USA)
820-5348548 IT11 Naval Sea Systems Command (USA)
295902E MK30-5 Babcock & Wilcox Co (USA)
Related Parts
4470-00-995-0693INTERCHANGEABLE
DIAPHRAGM

Frequently Asked Questions

What is NSN 4820-01-234-3671?

NSN 4820-01-234-3671 is a Diaphragm,actuator Valve,special, manufactured by The Babcock & Wilcox Company Dba B & W Service Co Div B&w Service Company, classified under FSC 4820 (No Item Name Available). Status: active.

What are the part numbers for NSN 4820-01-234-3671?

NSN 4820-01-234-3671 has 3 cross-referenced part numbers: 295902E MK30-5 (The Babcock & Wilcox Company Dba B & W Service Co Div B&w Service Company), 820-5348548 IT11 (Naval Sea Systems Command), 295902E MK30-5 (Babcock & Wilcox Co).

What NSN replaces 4820-01-234-3671?

There is 1 known substitute for 4820-01-234-3671: 4470-00-995-0693. Verify interchangeability with system specifications before substitution.

What are the specifications of 295902E MK30-5?

Key specifications for 295902E MK30-5: Overall Height: 0.750 INCHES NOMINAL IN; Criticality Code Justification: ZZZY; Outside Diameter: 7.229 INCHES MINIMUM AND 7.239 INCHES MAXIMUM IN; Style Designator: SPECIAL SHAPED. 6 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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