PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

21-173Piston,internal Combustion Engin

Hii Unmanned Systems, Inc · NSN 2815-01-624-3834 · FSC 2815 · No Item Name Available
Verified by PartsTable
NSN 2815-01-624-3834 — this item is cataloged by the U.S. Government under National Stock Number 2815-01-624-3834. Primary manufacturer part number: 21-173.
Features
  • Piston,internal Combustion Engin — FSC 2815
  • 1 verified cross-reference
  • Primary manufacturer: Hii Unmanned Systems, Inc
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Piston,internal Combustion Engin, cataloged under National Stock Number 2815-01-624-3834, is classified within Federal Supply Class 2815 (No Item Name Available) of the Engines, Turbines, and Components group. The primary manufacturer of record is Hii Unmanned Systems, Inc. This item has 1 commercial cross-reference from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 6 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN2815-01-624-3834
Primary Part Number21-173
Item NamePiston,internal Combustion Engin
FSC / FSG2815 / 28 — No Item Name Available
ManufacturerHii Unmanned Systems, Inc
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 6
5950-00-324-0985989112-36B INTERCHANGEABLE
Coil,radio Frequency
Raytheon Company Dba Raytheon
5905-00-666-1845D754 INTERCHANGEABLE
Resistor,thermal
Seco Tools, Llc Dba Seco
5940-00-789-840721173-000 INTERCHANGEABLE
Splice,conductor
Eaton Corporation Div Eaton Fluid Power
5330-00-841-697621173 INTERCHANGEABLE
Seal,plain Encased
Skf Usa Inc. Dba Skf Aerospace Sealing Solutions
6550-01-243-5899 INTERCHANGEABLE
Culture Medium,mannitol Salt Aga
2640-01-416-715821-173 INTERCHANGEABLE
Valve,pneumatic Tire
Myers Tire Supply Distribution Inc Div Akron Branch
Cross-Reference Index
Part NumberManufacturer
21-173 PRIMARY Hii Unmanned Systems, Inc (USA)
Related Parts
5950-00-324-0985INTERCHANGEABLE
COIL,RADIO FREQUENCY
989112-36B
5905-00-666-1845INTERCHANGEABLE
RESISTOR,THERMAL
D754
5940-00-789-8407INTERCHANGEABLE
SPLICE,CONDUCTOR
21173-000
5330-00-841-6976INTERCHANGEABLE
SEAL,PLAIN ENCASED
21173
6550-01-243-5899INTERCHANGEABLE
CULTURE MEDIUM,MANNITOL SALT AGA
2640-01-416-7158INTERCHANGEABLE
VALVE,PNEUMATIC TIRE
21-173

Frequently Asked Questions

What is NSN 2815-01-624-3834?

NSN 2815-01-624-3834 is a Piston,internal Combustion Engin, manufactured by Hii Unmanned Systems, Inc, classified under FSC 2815 (No Item Name Available). Status: active.

What are the part numbers for NSN 2815-01-624-3834?

NSN 2815-01-624-3834 has 1 cross-referenced part number: 21-173 (Hii Unmanned Systems, Inc).

What NSN replaces 2815-01-624-3834?

There are 6 known substitutes for 2815-01-624-3834: 5950-00-324-0985, 5905-00-666-1845, 5940-00-789-8407 and 3 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 21-173?

Key specifications for 21-173: End Item Identification: AN/WSQ-44 UNI; Part Name Assigned by Controlling Agency: PISTON MOTOR. 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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