PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

5-21422LStarter,engine,air

Maradyne Corporation · NSN 2990-01-084-3484 · FSC 2990 · No Item Name Available
Verified by PartsTable
NSN 2990-01-084-3484 — this item is cataloged by the U.S. Government under National Stock Number 2990-01-084-3484. Primary manufacturer part number: 5-21422L.
Features
  • Starter,engine,air — FSC 2990
  • 4 verified cross-references
  • Primary manufacturer: Maradyne Corporation
Applications
  • Mechanical power generation
  • Drive system operation
  • Auxiliary equipment operation
General Description

The Starter,engine,air, cataloged under National Stock Number 2990-01-084-3484, is classified within Federal Supply Class 2990 (No Item Name Available) of the Engine Accessories group. The primary manufacturer of record is Maradyne Corporation. This item has 4 commercial cross-references from 3 manufacturers, enabling identification through both NSN and commercial part number lookups. 7 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Catalog Facts
Item NameStarter,engine,air
FSC / FSG2990 — No Item Name Available (FSG 29)
ManufacturersMaradyne Corporation (CAGE 0DBY7); Stanadyne Corporation Dba Stanadyne Diesel Systems Div Diesel Systems (CAGE 84760); Sycon Corp (CAGE 01218)
Technical Specifications
ParameterValue
NSN2990-01-084-3484
Primary Part Number5-21422L
Item NameStarter,engine,air
FSC / FSG2990 / 29 — No Item Name Available
ManufacturerMaradyne Corporation
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 7
3120-00-035-690221-422 INTERCHANGEABLE
Bearing,sleeve
Dresser Industries Inc Leroi Div
5930-00-044-480165302-12559-103 INTERCHANGEABLE
Switch,pressure
Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp
6685-00-180-892721-422 INTERCHANGEABLE
Regulator,single to
Horizon Aerospace Llc Dba Magnetics Division
5325-00-290-8022214-22 INTERCHANGEABLE
Receptacle,turnlock Fastener
Howmet Global Fastening Systems Inc Div Camloc Products
5935-00-403-79652142-2 INTERCHANGEABLE
Jack,tip
Fluke Electronics Corp
5935-01-103-260721422 INTERCHANGEABLE
Connector,receptacle,electrical
Smiths Aerospace, Inc., Electronic Systems-Grand Rapids
5935-01-621-70942142-2 INTERCHANGEABLE
Connector,receptacle,electrical
Pomona Electronics
Cross-Reference Index
Part NumberManufacturer
21422 Maradyne Corporation (USA)
21422 Stanadyne Corporation Dba Stanadyne Diesel Systems Div Diesel Systems (USA)
5-21422L PRIMARY Maradyne Corporation (USA)
21422 Sycon Corp (USA)
Related Parts
3120-00-035-6902INTERCHANGEABLE
BEARING,SLEEVE
21-422
5930-00-044-4801INTERCHANGEABLE
SWITCH,PRESSURE
65302-12559-103
6685-00-180-8927INTERCHANGEABLE
REGULATOR,SINGLE TO
21-422
5325-00-290-8022INTERCHANGEABLE
RECEPTACLE,TURNLOCK FASTENER
214-22
5935-00-403-7965INTERCHANGEABLE
JACK,TIP
2142-2
5935-01-103-2607INTERCHANGEABLE
CONNECTOR,RECEPTACLE,ELECTRICAL
21422
5935-01-621-7094INTERCHANGEABLE
CONNECTOR,RECEPTACLE,ELECTRICAL
2142-2

Frequently Asked Questions

What is NSN 2990-01-084-3484?

NSN 2990-01-084-3484 is a Starter,engine,air, manufactured by Maradyne Corporation, classified under FSC 2990 (No Item Name Available). Status: active.

What are the part numbers for NSN 2990-01-084-3484?

NSN 2990-01-084-3484 has 4 cross-referenced part numbers: 21422 (Maradyne Corporation), 21422 (Stanadyne Corporation Dba Stanadyne Diesel Systems Div Diesel Systems), 5-21422L (Maradyne Corporation), 21422 (Sycon Corp).

What NSN replaces 2990-01-084-3484?

There are 7 known substitutes for 2990-01-084-3484: 3120-00-035-6902, 5930-00-044-4801, 6685-00-180-8927 and 4 more. Verify interchangeability with system specifications before substitution.

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