PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

25121Piston Assembly,fuel Unit

Danfoss Inc · NSN 4530-00-080-7348 · FSC 4530 · No Item Name Available
Verified by PartsTable
NSN 4530-00-080-7348 — this item is cataloged by the U.S. Government under National Stock Number 4530-00-080-7348. Primary manufacturer part number: 25121.
Features
  • Piston Assembly,fuel Unit — FSC 4530
  • General Characteristics Item Description: CONSISTS OF 1 ROLL OVER,1 PART NO. 131-25120,1 PART NO. 131-23472,1 PART NO. 131-21193
  • 6 verified cross-references
  • Primary manufacturer: Danfoss Inc
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Piston Assembly,fuel Unit, cataloged under National Stock Number 4530-00-080-7348, is classified within Federal Supply Class 4530 (No Item Name Available) of the Plumbing, Heating, and Waste Disposal group. The primary manufacturer of record is Danfoss Inc. Government technical data includes 1 verified specification, sourced from the Federal Logistics Information System (FLIS). This item has 6 commercial cross-references from 4 manufacturers, enabling identification through both NSN and commercial part number lookups. 8 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN4530-00-080-7348
Primary Part Number25121
Item NamePiston Assembly,fuel Unit
FSC / FSG4530 / 45 — No Item Name Available
ManufacturerDanfoss Inc
StatusACTIVE
General Characteristics Item DescriptionCONSISTS OF 1 ROLL OVER,1 PART NO. 131-25120,1 PART NO. 131-23472,1 PART NO. 131-21193
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 8
4820-00-032-882625121 INTERCHANGEABLE
Seat,valve
Meggitt North Hollywood Inc
5133-00-228-1332 INTERCHANGEABLE
Drill,twist
5360-00-263-456325121 INTERCHANGEABLE
Spring,helical,compression
Honeywell International Inc. Div Aerospace - Torrance
5330-00-715-5144 INTERCHANGEABLE
Gasket
5331-01-091-847325-121 INTERCHANGEABLE
O-Ring
Stewart & Stevenson Power Products Llc
3455-01-236-792425121 INTERCHANGEABLE
Cutter,milling,end
Niagara Cutter Inc
6685-01-426-4789251-21 INTERCHANGEABLE
Thermometer,indicating,capillary
Shinko Ind. Ltd
4720-01-537-7776 INTERCHANGEABLE
Hose Assembly,nonmetallic
Cross-Reference Index
Part NumberManufacturer
25121 PRIMARY Danfoss Inc (USA)
132-25121 Danfoss Fluid Power Inc Racine Opn (USA)
25121 Way Wolff Associates Inc (USA)
132-25121-64294 Demarkus Corp Refrigeration Engineering Corp (USA)
132-25121 Danfoss Inc (USA)
25121 Danfoss Fluid Power Inc Racine Opn (USA)
Related Parts
4820-00-032-8826INTERCHANGEABLE
SEAT,VALVE
25121
5133-00-228-1332INTERCHANGEABLE
DRILL,TWIST
5360-00-263-4563INTERCHANGEABLE
SPRING,HELICAL,COMPRESSION
25121
5330-00-715-5144INTERCHANGEABLE
GASKET
5331-01-091-8473INTERCHANGEABLE
O-RING
25-121
3455-01-236-7924INTERCHANGEABLE
CUTTER,MILLING,END
25121
6685-01-426-4789INTERCHANGEABLE
THERMOMETER,INDICATING,CAPILLARY
251-21
4720-01-537-7776INTERCHANGEABLE
HOSE ASSEMBLY,NONMETALLIC

Frequently Asked Questions

What is NSN 4530-00-080-7348?

NSN 4530-00-080-7348 is a Piston Assembly,fuel Unit, manufactured by Danfoss Inc, classified under FSC 4530 (No Item Name Available). Status: active.

What are the part numbers for NSN 4530-00-080-7348?

NSN 4530-00-080-7348 has 6 cross-referenced part numbers: 25121 (Danfoss Inc), 132-25121 (Danfoss Fluid Power Inc Racine Opn), 25121 (Way Wolff Associates Inc), 132-25121-64294 (Demarkus Corp Refrigeration Engineering Corp), 132-25121 (Danfoss Inc) and 1 more.

What NSN replaces 4530-00-080-7348?

There are 8 known substitutes for 4530-00-080-7348: 4820-00-032-8826, 5133-00-228-1332, 5360-00-263-4563 and 5 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 25121?

Key specifications for 25121: General Characteristics Item Description: CONSISTS OF 1 ROLL OVER,1 PART NO. 131-25120,1 PART NO. 131-23472,1 PART NO. 131-21193; End Item Identification: WEBSTER ELECTRIC PART NO. 132-21517. 2 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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