PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

18580Expander Piston Rin

Franklin Engine Co Inc · NSN 5120-00-449-3972 · FSC 5120 · No Item Name Available
Verified by PartsTable
NSN 5120-00-449-3972 — this item is cataloged by the U.S. Government under National Stock Number 5120-00-449-3972. Primary manufacturer part number: 18580.
Features
  • Expander Piston Rin — FSC 5120
  • 1 verified cross-reference
  • Primary manufacturer: Franklin Engine Co Inc
Applications
  • Field maintenance and repair
  • Facility maintenance operations
  • General-purpose hand tools
General Description

The Expander Piston Rin, cataloged under National Stock Number 5120-00-449-3972, is classified within Federal Supply Class 5120 (No Item Name Available) of the Hand Tools group. The primary manufacturer of record is Franklin Engine Co Inc. This item has 1 commercial cross-reference from 1 manufacturer, 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 NameExpander Piston Rin
FSC / FSG5120 — No Item Name Available (FSG 51)
ManufacturersFranklin Engine Co Inc (CAGE 70188)
Technical Specifications
ParameterValue
NSN5120-00-449-3972
Primary Part Number18580
Item NameExpander Piston Rin
FSC / FSG5120 / 51 — No Item Name Available
ManufacturerFranklin Engine Co Inc
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 10
5305-00-011-1633111633 INTERCHANGEABLE
Screw,tapping
Us Army Aviation and Missile Command
5330-00-042-8649 INTERCHANGEABLE
Seal,plain Encased
5950-00-347-562118580 INTERCHANGEABLE
Transformer,electrical
Freed Transformer Co
5905-00-874-007366-4062-12 INTERCHANGEABLE
Resistor,variable,wire Wound,non
Ward Leonard Ct Llc
5950-00-962-29232242046 INTERCHANGEABLE
Transformer,power
Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier
5950-00-989-433418-580 INTERCHANGEABLE
Coil,radio Frequency
Albert Frei & Sons, Inc. Dba Afs
4320-01-041-354318580 INTERCHANGEABLE
Sleeve,sliding,by-Pass Valve
Stanadyne Corporation Dba Stanadyne Diesel Systems Div Diesel Systems
8040-01-335-1402 INTERCHANGEABLE
Accelerator,adhesive Curing
6510-01-578-2070 INTERCHANGEABLE
Adhesive Ties,surgical
8145-01-587-524700033920 INTERCHANGEABLE
Case,shipping and Storage,pharma
Becklin Holdings, Inc.
Cross-Reference Index
Part NumberManufacturer
18580 Franklin Engine Co Inc (USA)
Related Parts
5305-00-011-1633INTERCHANGEABLE
SCREW,TAPPING
111633
5330-00-042-8649INTERCHANGEABLE
SEAL,PLAIN ENCASED
5950-00-347-5621INTERCHANGEABLE
TRANSFORMER,ELECTRICAL
18580
5905-00-874-0073INTERCHANGEABLE
RESISTOR,VARIABLE,WIRE WOUND,NON
66-4062-12
5950-00-962-2923INTERCHANGEABLE
TRANSFORMER,POWER
2242046
5950-00-989-4334INTERCHANGEABLE
COIL,RADIO FREQUENCY
18-580
4320-01-041-3543INTERCHANGEABLE
SLEEVE,SLIDING,BY-PASS VALVE
18580
8040-01-335-1402INTERCHANGEABLE
ACCELERATOR,ADHESIVE CURING
6510-01-578-2070INTERCHANGEABLE
ADHESIVE TIES,SURGICAL
8145-01-587-5247INTERCHANGEABLE
CASE,SHIPPING AND STORAGE,PHARMA
00033920

Frequently Asked Questions

What is NSN 5120-00-449-3972?

NSN 5120-00-449-3972 is a Expander Piston Rin, manufactured by Franklin Engine Co Inc, classified under FSC 5120 (No Item Name Available). Status: active.

What are the part numbers for NSN 5120-00-449-3972?

NSN 5120-00-449-3972 has 1 cross-referenced part number: 18580 (Franklin Engine Co Inc).

What NSN replaces 5120-00-449-3972?

There are 10 known substitutes for 5120-00-449-3972: 5305-00-011-1633, 5330-00-042-8649, 5950-00-347-5621 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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