PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

20T21-26580Switch,thermostatic

Therm-O-Disc Incorporated · NSN 5930-00-955-9903 · FSC 5930 · No Item Name Available
Verified by PartsTable
NSN 5930-00-955-9903 — this item is cataloged by the U.S. Government under National Stock Number 5930-00-955-9903. Primary manufacturer part number: 20T21-26580.
Features
  • Switch,thermostatic — FSC 5930
  • 2 verified cross-references
  • Primary manufacturer: Therm-O-Disc Incorporated
Applications
  • Circuit control and protection
  • Equipment power management
  • Signal routing
General Description

The Switch,thermostatic, cataloged under National Stock Number 5930-00-955-9903, is classified within Federal Supply Class 5930 (No Item Name Available) of the Electrical and Electronic Equipment Components group. The primary manufacturer of record is Therm-O-Disc Incorporated. This item has 2 commercial cross-references from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 1 verified substitute exists in the FLIS interchangeability database. Current acquisition status: Active.

Catalog Facts
Item NameSwitch,thermostatic
FSC / FSG5930 — No Item Name Available (FSG 59)
ManufacturersTherm-O-Disc Incorporated (CAGE 81439)
Technical Specifications
ParameterValue
NSN5930-00-955-9903
Primary Part Number20T21-26580
Item NameSwitch,thermostatic
FSC / FSG5930 / 59 — No Item Name Available
ManufacturerTherm-O-Disc Incorporated
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 1
6685-00-786-4050 INTERCHANGEABLE
Thermometer,indicating,capillary
Cross-Reference Index
Part NumberManufacturer
20T21 Therm-O-Disc Incorporated (USA)
20T21-26580 PRIMARY Therm-O-Disc Incorporated (USA)
Related Parts
6685-00-786-4050INTERCHANGEABLE
THERMOMETER,INDICATING,CAPILLARY

Frequently Asked Questions

What is NSN 5930-00-955-9903?

NSN 5930-00-955-9903 is a Switch,thermostatic, manufactured by Therm-O-Disc Incorporated, classified under FSC 5930 (No Item Name Available). Status: active.

What are the part numbers for NSN 5930-00-955-9903?

NSN 5930-00-955-9903 has 2 cross-referenced part numbers: 20T21 (Therm-O-Disc Incorporated), 20T21-26580 (Therm-O-Disc Incorporated).

What NSN replaces 5930-00-955-9903?

There is 1 known substitute for 5930-00-955-9903: 6685-00-786-4050. Verify interchangeability with system specifications before substitution.

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