PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

803187Diaphragm,regulator

Mine Safety Appliances Company · NSN 4240-00-495-9138 · FSC 4240 · No Item Name Available
Verified by PartsTable
NSN 4240-00-495-9138 — this item is cataloged by the U.S. Government under National Stock Number 4240-00-495-9138. Primary manufacturer part number: 803187.
Features
  • Diaphragm,regulator — FSC 4240
  • 2 verified cross-references
  • Primary manufacturer: Mine Safety Appliances Company
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Diaphragm,regulator, cataloged under National Stock Number 4240-00-495-9138, is classified within Federal Supply Class 4240 (No Item Name Available) of the Fire Fighting, Rescue, and Safety Equipment group. The primary manufacturer of record is Mine Safety Appliances Company. This item has 2 commercial cross-references from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 4 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Catalog Facts
Item NameDiaphragm,regulator
FSC / FSG4240 — No Item Name Available (FSG 42)
ManufacturersMine Safety Appliances Company (CAGE 55799)
Technical Specifications
ParameterValue
NSN4240-00-495-9138
Primary Part Number803187
Item NameDiaphragm,regulator
FSC / FSG4240 / 42 — No Item Name Available
ManufacturerMine Safety Appliances Company
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 4
5331-00-618-1920MS28775-017 INTERCHANGEABLE
O-Ring
Sae International Dba Sae International
3040-00-766-579495376-72 INTERCHANGEABLE
Core,flexible Shaft Assembly
Stewart-Warner Corporation
6610-00-777-1103953-76 INTERCHANGEABLE
Housing Assembly Potentiometer
Aerosonic Llc
4130-01-153-0982 INTERCHANGEABLE
Weld Muffler
Cross-Reference Index
Part NumberManufacturer
803187 PRIMARY Mine Safety Appliances Company (USA)
95376 Mine Safety Appliances Company (USA)
Related Parts
5331-00-618-1920INTERCHANGEABLE
O-RING
MS28775-017
3040-00-766-5794INTERCHANGEABLE
CORE,FLEXIBLE SHAFT ASSEMBLY
95376-72
6610-00-777-1103INTERCHANGEABLE
HOUSING ASSEMBLY POTENTIOMETER
953-76
4130-01-153-0982INTERCHANGEABLE
WELD MUFFLER

Frequently Asked Questions

What is NSN 4240-00-495-9138?

NSN 4240-00-495-9138 is a Diaphragm,regulator, manufactured by Mine Safety Appliances Company, classified under FSC 4240 (No Item Name Available). Status: active.

What are the part numbers for NSN 4240-00-495-9138?

NSN 4240-00-495-9138 has 2 cross-referenced part numbers: 803187 (Mine Safety Appliances Company), 95376 (Mine Safety Appliances Company).

What NSN replaces 4240-00-495-9138?

There are 4 known substitutes for 4240-00-495-9138: 5331-00-618-1920, 3040-00-766-5794, 6610-00-777-1103 and 1 more. Verify interchangeability with system specifications before substitution.

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