PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

20275-4Bracket,overspeed Trip Mounting

Triumph Thermal Systems - Maryland, Inc. · NSN 1650-00-604-6604 · FSC 1650 · No Item Name Available
Verified by PartsTable
NSN 1650-00-604-6604 — this item is cataloged by the U.S. Government under National Stock Number 1650-00-604-6604. Primary manufacturer part number: 20275-4.
Features
  • Bracket,overspeed Trip Mounting — FSC 1650
  • General Characteristics Item Description: MAGNESIUM ALLOY PER QQ&M&56,4 HOLES 0.218 IN. DIA IN
  • 4 verified cross-references
  • Primary manufacturer: Triumph Thermal Systems - Maryland, Inc.
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Bracket,overspeed Trip Mounting, cataloged under National Stock Number 1650-00-604-6604, is classified within Federal Supply Class 1650 (No Item Name Available) of the Aircraft Components and Accessories group. The primary manufacturer of record is Triumph Thermal Systems - Maryland, Inc.. Government technical data includes 1 verified specification, sourced from the Federal Logistics Information System (FLIS). This item has 4 commercial cross-references from 3 manufacturers, enabling identification through both NSN and commercial part number lookups. 4 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN1650-00-604-6604
Primary Part Number20275-4
Item NameBracket,overspeed Trip Mounting
FSC / FSG1650 / 16 — No Item Name Available
ManufacturerTriumph Thermal Systems - Maryland, Inc.
StatusACTIVE
General Characteristics Item DescriptionMAGNESIUM ALLOY PER QQ&M&56,4 HOLES 0.218 IN. DIA IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 4
1660-00-783-1139202752 INTERCHANGEABLE
Seal,impeller,turbine
Honeywell International Inc. Div Aerospace - Torrance
1660-00-783-1141202754 INTERCHANGEABLE
Impeller Wheel,aircraft Cooling
Honeywell International Inc. Div Aerospace - Torrance
4140-01-191-4886 INTERCHANGEABLE
Impeller,fan,axial
4730-01-596-1504202752 INTERCHANGEABLE
Elbow,pipe
G R Mfg
Cross-Reference Index
Part NumberManufacturer
20275-2 Triumph Thermal Systems - Maryland, Inc. (USA)
20275-2 Hiller Aircraft Corporation (USA)
20275-2 Defense & Development Enterprises Llc (USA)
20275-4 PRIMARY Triumph Thermal Systems - Maryland, Inc. (USA)
Related Parts
1660-00-783-1139INTERCHANGEABLE
SEAL,IMPELLER,TURBINE
202752
1660-00-783-1141INTERCHANGEABLE
IMPELLER WHEEL,AIRCRAFT COOLING
202754
4140-01-191-4886INTERCHANGEABLE
IMPELLER,FAN,AXIAL
4730-01-596-1504INTERCHANGEABLE
ELBOW,PIPE
202752

Frequently Asked Questions

What is NSN 1650-00-604-6604?

NSN 1650-00-604-6604 is a Bracket,overspeed Trip Mounting, manufactured by Triumph Thermal Systems - Maryland, Inc., classified under FSC 1650 (No Item Name Available). Status: active.

What are the part numbers for NSN 1650-00-604-6604?

NSN 1650-00-604-6604 has 4 cross-referenced part numbers: 20275-2 (Triumph Thermal Systems - Maryland, Inc.), 20275-2 (Hiller Aircraft Corporation), 20275-2 (Defense & Development Enterprises Llc), 20275-4 (Triumph Thermal Systems - Maryland, Inc.).

What NSN replaces 1650-00-604-6604?

There are 4 known substitutes for 1650-00-604-6604: 1660-00-783-1139, 1660-00-783-1141, 4140-01-191-4886 and 1 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 20275-4?

Key specifications for 20275-4: General Characteristics Item Description: MAGNESIUM ALLOY PER QQ&M&56,4 HOLES 0.218 IN. DIA IN. 1 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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