PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

118515Diaphragm,valve,flat

Circor Aerospace, Inc. Dba Circor Aerospace Inc · NSN 4820-00-545-2251 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-00-545-2251 — this item is cataloged by the U.S. Government under National Stock Number 4820-00-545-2251. Primary manufacturer part number: 118515.
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 4820-00-545-2251, 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. 10 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)
ManufacturersEaton Aerospace Llc Dba Sterer Engineering Div Valve & Actuator (CAGE 09790); Circor Aerospace, Inc. Dba Circor Aerospace Inc (CAGE 91816)
Technical Specifications
ParameterValue
NSN4820-00-545-2251
Primary Part Number118515
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 10
6240-00-143-7433143-1 INTERCHANGEABLE
Lamp,incandescent
S and S X-Ray Products Inc
3110-00-144-8522118515 INTERCHANGEABLE
Bearing,ball,annular
Komatsu America Corp.
5360-00-168-2070118-15 INTERCHANGEABLE
Spring,helical,compression
Siemens Industry, Inc. Dba Siemens Energy Div Process Industries and Drives
5310-00-185-63430127717 INTERCHANGEABLE
Nut,plain,round
Rolls-Royce Solutions America Inc
5330-00-285-946711815 INTERCHANGEABLE
Seal,plain Encased
Tiffin Parts, L.l.c. Div Subsidiary of Pettibone Corp.
5935-00-494-5854877051051 INTERCHANGEABLE
Connector,receptacle,electrical
Molex, Llc
4920-00-976-9552 INTERCHANGEABLE
Emitter,module
4730-01-015-9314 INTERCHANGEABLE
Plug,pipe
4330-01-153-8387RK11-2005 INTERCHANGEABLE
Bracket,filter Mounting
Parker-Hannifin Corporation Dba Racor Division Div Racor Division
3040-01-417-669177601 INTERCHANGEABLE
Ring,rod,piston
Hampton Hydraulics, Llc
Cross-Reference Index
Part NumberManufacturer
11815 Eaton Aerospace Llc Dba Sterer Engineering Div Valve & Actuator (USA)
118515 Eaton Aerospace Llc Dba Sterer Engineering Div Valve & Actuator (USA)
118515 PRIMARY Circor Aerospace, Inc. Dba Circor Aerospace Inc (USA)
Related Parts
6240-00-143-7433INTERCHANGEABLE
LAMP,INCANDESCENT
143-1
3110-00-144-8522INTERCHANGEABLE
BEARING,BALL,ANNULAR
118515
5360-00-168-2070INTERCHANGEABLE
SPRING,HELICAL,COMPRESSION
118-15
5310-00-185-6343INTERCHANGEABLE
NUT,PLAIN,ROUND
0127717
5330-00-285-9467INTERCHANGEABLE
SEAL,PLAIN ENCASED
11815
5935-00-494-5854INTERCHANGEABLE
CONNECTOR,RECEPTACLE,ELECTRICAL
877051051
4920-00-976-9552INTERCHANGEABLE
EMITTER,MODULE
4730-01-015-9314INTERCHANGEABLE
PLUG,PIPE
4330-01-153-8387INTERCHANGEABLE
BRACKET,FILTER MOUNTING
RK11-2005
3040-01-417-6691INTERCHANGEABLE
RING,ROD,PISTON
77601

Frequently Asked Questions

What is NSN 4820-00-545-2251?

NSN 4820-00-545-2251 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 4820-00-545-2251?

NSN 4820-00-545-2251 has 3 cross-referenced part numbers: 11815 (Eaton Aerospace Llc Dba Sterer Engineering Div Valve & Actuator), 118515 (Eaton Aerospace Llc Dba Sterer Engineering Div Valve & Actuator), 118515 (Circor Aerospace, Inc. Dba Circor Aerospace Inc).

What NSN replaces 4820-00-545-2251?

There are 10 known substitutes for 4820-00-545-2251: 6240-00-143-7433, 3110-00-144-8522, 5360-00-168-2070 and 7 more. Verify interchangeability with system specifications before substitution.

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