PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

103421Spacer,ring

Triumph Thermal Systems - Maryland, Inc. · NSN 5365-00-677-8522 · FSC 5365 · No Item Name Available
Verified by PartsTable
NSN 5365-00-677-8522 — this item is cataloged by the U.S. Government under National Stock Number 5365-00-677-8522. Primary manufacturer part number: 103421.
Features
  • Spacer,ring — FSC 5365
  • 2 verified cross-references
  • Primary manufacturer: Triumph Thermal Systems - Maryland, Inc.
Applications
  • General assembly and fastening
  • Structural repair and reinforcement
  • Facility maintenance hardware
General Description

The Spacer,ring, cataloged under National Stock Number 5365-00-677-8522, is classified within Federal Supply Class 5365 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is Triumph Thermal Systems - Maryland, Inc.. This item has 2 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 4 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Catalog Facts
Item NameSpacer,ring
FSC / FSG5365 — No Item Name Available (FSG 53)
ManufacturersTriumph Thermal Systems - Maryland, Inc. (CAGE 01359); Defense & Development Enterprises Llc (CAGE 07KQ5)
Technical Specifications
ParameterValue
NSN5365-00-677-8522
Primary Part Number103421
Item NameSpacer,ring
FSC / FSG5365 / 53 — No Item Name Available
ManufacturerTriumph Thermal Systems - Maryland, Inc.
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 4
6680-00-226-969680374-1 INTERCHANGEABLE
Indicator,sight,liquid
L3harris Technologies, Inc. Div Space and Airborne Systems
6610-00-922-3307103421 INTERCHANGEABLE
Plate,connector
Astronautics Corporation of America
5360-01-047-670710342-1 INTERCHANGEABLE
Spring,helical,compression
Grimes Aerospace Company
1680-01-074-974910342-1 INTERCHANGEABLE
Cover,cushion
Lockheed Martin Corp
Cross-Reference Index
Part NumberManufacturer
103421 PRIMARY Triumph Thermal Systems - Maryland, Inc. (USA)
103421 Defense & Development Enterprises Llc (USA)
Related Parts
6680-00-226-9696INTERCHANGEABLE
INDICATOR,SIGHT,LIQUID
80374-1
6610-00-922-3307INTERCHANGEABLE
PLATE,CONNECTOR
103421
5360-01-047-6707INTERCHANGEABLE
SPRING,HELICAL,COMPRESSION
10342-1
1680-01-074-9749INTERCHANGEABLE
COVER,CUSHION
10342-1

Frequently Asked Questions

What is NSN 5365-00-677-8522?

NSN 5365-00-677-8522 is a Spacer,ring, manufactured by Triumph Thermal Systems - Maryland, Inc., classified under FSC 5365 (No Item Name Available). Status: active.

What are the part numbers for NSN 5365-00-677-8522?

NSN 5365-00-677-8522 has 2 cross-referenced part numbers: 103421 (Triumph Thermal Systems - Maryland, Inc.), 103421 (Defense & Development Enterprises Llc).

What NSN replaces 5365-00-677-8522?

There are 4 known substitutes for 5365-00-677-8522: 6680-00-226-9696, 6610-00-922-3307, 5360-01-047-6707 and 1 more. Verify interchangeability with system specifications before substitution.

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