PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

H224Tester,engine Trim

Howell Instruments, Inc. Dba Howell Instruments Inc · NSN 4920-00-176-8340 · FSC 4920 · No Item Name Available
Verified by PartsTable
NSN 4920-00-176-8340 — this item is cataloged by the U.S. Government under National Stock Number 4920-00-176-8340. Primary manufacturer part number: H224.
Features
  • Tester,engine Trim — FSC 4920
  • 2 verified cross-references
  • Primary manufacturer: Howell Instruments, Inc. Dba Howell Instruments Inc
Applications
  • Mechanical power generation
  • Drive system operation
  • Auxiliary equipment operation
General Description

The Tester,engine Trim, cataloged under National Stock Number 4920-00-176-8340, is classified within Federal Supply Class 4920 (No Item Name Available) of the Maintenance and Repair Shop Equipment group. The primary manufacturer of record is Howell Instruments, Inc. Dba Howell Instruments Inc. This item has 2 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 3 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Catalog Facts
Item NameTester,engine Trim
FSC / FSG4920 — No Item Name Available (FSG 49)
ManufacturersRtx Corporation Dba Pratt & Whitney Div Pratt &whitney (CAGE 77445); Howell Instruments, Inc. Dba Howell Instruments Inc (CAGE 98869)
Technical Specifications
ParameterValue
NSN4920-00-176-8340
Primary Part NumberH224
Item NameTester,engine Trim
FSC / FSG4920 / 49 — No Item Name Available
ManufacturerHowell Instruments, Inc. Dba Howell Instruments Inc
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 3
2815-00-365-22753B1143 INTERCHANGEABLE
Lock,valve Spring Retainer
Caterpillar Inc Div Caterpillar Defense
5999-00-383-2299221464PC107 INTERCHANGEABLE
Heater,thermal Release
Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier
5310-00-818-9542H22-4 INTERCHANGEABLE
Nut,self-Locking,double Hexagon
Howmet Global Fastening Systems Inc
Cross-Reference Index
Part NumberManufacturer
PWA23391 Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney (USA)
H224 PRIMARY Howell Instruments, Inc. Dba Howell Instruments Inc (USA)
Related Parts
2815-00-365-2275INTERCHANGEABLE
LOCK,VALVE SPRING RETAINER
3B1143
5999-00-383-2299INTERCHANGEABLE
HEATER,THERMAL RELEASE
221464PC107
5310-00-818-9542INTERCHANGEABLE
NUT,SELF-LOCKING,DOUBLE HEXAGON
H22-4

Frequently Asked Questions

What is NSN 4920-00-176-8340?

NSN 4920-00-176-8340 is a Tester,engine Trim, manufactured by Howell Instruments, Inc. Dba Howell Instruments Inc, classified under FSC 4920 (No Item Name Available). Status: active.

What are the part numbers for NSN 4920-00-176-8340?

NSN 4920-00-176-8340 has 2 cross-referenced part numbers: PWA23391 (Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney), H224 (Howell Instruments, Inc. Dba Howell Instruments Inc).

What NSN replaces 4920-00-176-8340?

There are 3 known substitutes for 4920-00-176-8340: 2815-00-365-2275, 5999-00-383-2299, 5310-00-818-9542. Verify interchangeability with system specifications before substitution.

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