PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

I904MDiaphragm,pump

Siemens Energy, Inc. · NSN 4320-00-398-6904 · FSC 4320 · No Item Name Available
Verified by PartsTable
NSN 4320-00-398-6904 — this item is cataloged by the U.S. Government under National Stock Number 4320-00-398-6904. Primary manufacturer part number: I904M.
Features
  • Diaphragm,pump — FSC 4320
  • 9 verified cross-references
  • Primary manufacturer: Siemens Energy, Inc.
Applications
  • Fluid transfer and circulation
  • Cooling system maintenance
  • Industrial process pumping
General Description

The Diaphragm,pump, cataloged under National Stock Number 4320-00-398-6904, is classified within Federal Supply Class 4320 (No Item Name Available) of the Pumps and Compressors group. The primary manufacturer of record is Siemens Energy, Inc.. This item has 9 commercial cross-references from 4 manufacturers, enabling identification through both NSN and commercial part number lookups. 2 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Catalog Facts
Item NameDiaphragm,pump
FSC / FSG4320 — No Item Name Available (FSG 43)
ManufacturersRps-Fl, Inc. Dba Rps Inc (CAGE 54402); Siemens Energy, Inc. (CAGE 16712); Circor Pumps North America Llc (CAGE 59180); Peck Equipment Co (CAGE 7A680)
Technical Specifications
ParameterValue
NSN4320-00-398-6904
Primary Part NumberI904M
Item NameDiaphragm,pump
FSC / FSG4320 / 43 — No Item Name Available
ManufacturerSiemens Energy, Inc.
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 2
4930-01-103-82065855 INTERCHANGEABLE
Adapter,grease Gun Coupling
Lincoln Industrial Corporation Div Lincoln Industrial Corporation
3110-01-621-50581904M INTERCHANGEABLE
Retainer,roller,bearing
Rbc Precision Products - Bremen, Inc.
Cross-Reference Index
Part NumberManufacturer
L-2165 Rps-Fl, Inc. Dba Rps Inc (USA)
1-904M Siemens Energy, Inc. (USA)
I904MANDI1185 Circor Pumps North America Llc (USA)
G10247PC251 Siemens Energy, Inc. (USA)
1904M Siemens Energy, Inc. (USA)
G10228PC251 Siemens Energy, Inc. (USA)
I904M PRIMARY Siemens Energy, Inc. (USA)
I904MANDI1185 Siemens Energy, Inc. (USA)
PE3986904 Peck Equipment Co (USA)
Related Parts
4930-01-103-8206INTERCHANGEABLE
ADAPTER,GREASE GUN COUPLING
5855
3110-01-621-5058INTERCHANGEABLE
RETAINER,ROLLER,BEARING
1904M

Frequently Asked Questions

What is NSN 4320-00-398-6904?

NSN 4320-00-398-6904 is a Diaphragm,pump, manufactured by Siemens Energy, Inc., classified under FSC 4320 (No Item Name Available). Status: active.

What are the part numbers for NSN 4320-00-398-6904?

NSN 4320-00-398-6904 has 9 cross-referenced part numbers: L-2165 (Rps-Fl, Inc. Dba Rps Inc), 1-904M (Siemens Energy, Inc.), I904MANDI1185 (Circor Pumps North America Llc), G10247PC251 (Siemens Energy, Inc.), 1904M (Siemens Energy, Inc.) and 4 more.

What NSN replaces 4320-00-398-6904?

There are 2 known substitutes for 4320-00-398-6904: 4930-01-103-8206, 3110-01-621-5058. Verify interchangeability with system specifications before substitution.

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