PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

31709Diaphragm,valve,flat

Circor Aerospace, Inc. Dba Circor Aerospace Inc · NSN 4820-01-007-0818 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-01-007-0818 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-007-0818. Primary manufacturer part number: 31709.
Features
  • Diaphragm,valve,flat — FSC 4820
  • 3 verified cross-references
  • Primary manufacturer: Circor Aerospace, Inc. Dba Circor Aerospace Inc
Applications
  • Flow control in piping systems
  • Pressure regulation
  • Steam and fluid isolation
General Description

The Diaphragm,valve,flat, cataloged under National Stock Number 4820-01-007-0818, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Circor Aerospace, Inc. Dba Circor Aerospace Inc. This item has 3 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 6 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Catalog Facts
Item NameDiaphragm,valve,flat
FSC / FSG4820 — No Item Name Available (FSG 48)
ManufacturersCircor Aerospace, Inc. Dba Circor Aerospace Inc (CAGE 91816); Babcock and Wilcox Co Control Components International (CAGE 19562)
Technical Specifications
ParameterValue
NSN4820-01-007-0818
Primary Part Number31709
Item NameDiaphragm,valve,flat
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerCircor Aerospace, Inc. Dba Circor Aerospace Inc
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 6
5985-00-115-2989113570 INTERCHANGEABLE
Waveguide Assembly
Frontgrade Technologies Inc.
5940-00-238-9588B115G INTERCHANGEABLE
Terminal,lug
Abb Installation Products Inc
4820-01-006-53545937 INTERCHANGEABLE
Parts Kit,globe Valve
Circor Aerospace, Inc. Dba Circor Aerospace Inc
1680-01-102-010731709 INTERCHANGEABLE
Body
Eaton Aerospace Llc Dba Eaton Aerospace Jackson
4730-01-332-5816113570 INTERCHANGEABLE
Reducer,tube
Honeywell International Inc. Dba Honeywell International Div Aerospace - Tempe (west Warner Road)
5365-01-429-3710D-3170PC9 INTERCHANGEABLE
Plug,machine Thread
Walz & Krenzer Inc Div Mapeco Products
Cross-Reference Index
Part NumberManufacturer
P38-433-3PC29 Circor Aerospace, Inc. Dba Circor Aerospace Inc (USA)
31709 PRIMARY Circor Aerospace, Inc. Dba Circor Aerospace Inc (USA)
113570 Babcock and Wilcox Co Control Components International (USA)
Related Parts
5985-00-115-2989INTERCHANGEABLE
WAVEGUIDE ASSEMBLY
113570
5940-00-238-9588INTERCHANGEABLE
TERMINAL,LUG
B115G
4820-01-006-5354INTERCHANGEABLE
PARTS KIT,GLOBE VALVE
5937
1680-01-102-0107INTERCHANGEABLE
BODY
31709
4730-01-332-5816INTERCHANGEABLE
REDUCER,TUBE
113570
5365-01-429-3710INTERCHANGEABLE
PLUG,MACHINE THREAD
D-3170PC9

Frequently Asked Questions

What is NSN 4820-01-007-0818?

NSN 4820-01-007-0818 is a Diaphragm,valve,flat, manufactured by Circor Aerospace, Inc. Dba Circor Aerospace Inc, classified under FSC 4820 (No Item Name Available). Status: active.

What are the part numbers for NSN 4820-01-007-0818?

NSN 4820-01-007-0818 has 3 cross-referenced part numbers: P38-433-3PC29 (Circor Aerospace, Inc. Dba Circor Aerospace Inc), 31709 (Circor Aerospace, Inc. Dba Circor Aerospace Inc), 113570 (Babcock and Wilcox Co Control Components International).

What NSN replaces 4820-01-007-0818?

There are 6 known substitutes for 4820-01-007-0818: 5985-00-115-2989, 5940-00-238-9588, 4820-01-006-5354 and 3 more. Verify interchangeability with system specifications before substitution.

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