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HC26-51-17A1 — SWITCH,THERMOSTATIC

✓ Government record, cited
— · COMPONENT
PRODUCT OVERVIEW

HC26-51-17A1: SWITCH,THERMOSTATIC.

The SWITCH,THERMOSTATIC is a the manufacturer industrial component. Key specifications include body_length: 1.000 INCHES NOMINAL IN, body_diameter: 0.558 INCHES MINIMUM AND 0.563 INCHES MAXIMUM IN, terminal_type: SCREW, mounting_method: IMMERSION WELL, features_provided: INTERNALLY GROUNDED, width_across_flats: 0.875 INCHES NOMINAL IN. This part is cataloged in the U.S.

Government catalog under NSN 5930-00-474-7389, indicating validated use in U.S. government and defense logistics supply chains. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels.

Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS
HC26-51-17A1
NSN: 5930-00-474-7389
FSC: 5930 — Switches
CAGE: 96821 — HESSE CORP (USA)
SPECIFICATIONS
body_length1.000 INCHES NOMINAL IN
body_diameter0.558 INCHES MINIMUM AND 0.563 INCHES MAXIMUM IN
terminal_typeSCREW
mounting_methodIMMERSION WELL
features_providedINTERNALLY GROUNDED
width_across_flats0.875 INCHES NOMINAL IN
contact_adjustabilityACTUATION POINT NOT ADJUSTABLE
contact_action_stimulusINCREASE
contact_stimulus_rating208.00 ACTUATION POINT MINIMUM DEGREES FAHRENHEIT AND 212.00 ACTUATION POINT MAXIMUM DEGREES FAHRENHEIT
media_for_which_designedGAS OR LIQUID
temp_sensing_element_typeINTERNAL SENSOR
nonpile-up_contact_arrangement1 POLE, SINGLE THROW, NORMALLY OPEN, MOMENTARY ACTION
NSN5930-00-474-7389
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available SWITCH,THERMOSTATIC TITLE COMPONENT PN HC26-51-17A1 MFR SWITCH,THERMOSTATIC
KEY FEATURES
•
BODY DIAMETER: 0.558 INCHES MINIMUM AND 0.563 INCHES MAXIMUM IN
•
WIDTH ACROSS FLATS: 0.875 INCHES NOMINAL IN
•
CONTACT ACTION STIMULUS: INCREASE
•
TERMINAL TYPE: SCREW
•
MOUNTING METHOD: IMMERSION WELL
•
TEMP SENSING ELEMENT TYPE: INTERNAL SENSOR
•
FEATURES PROVIDED: INTERNALLY GROUNDED
•
BODY LENGTH: 1.000 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
BODY DIAMETER0.558 INCHES MINIMUM AND 0.563 INCHES MAXIMUM IN
WIDTH ACROSS FLATS0.875 INCHES NOMINAL IN
CONTACT ACTION STIMULUSINCREASE
TERMINAL TYPESCREW
MOUNTING METHODIMMERSION WELL
TEMP SENSING ELEMENT TYPEINTERNAL SENSOR
FEATURES PROVIDEDINTERNALLY GROUNDED
BODY LENGTH1.000 INCHES NOMINAL IN
NONPILE-UP CONTACT ARRANGEMENT1 POLE, SINGLE THROW, NORMALLY OPEN, MOMENTARY ACTION
MEDIA FOR WHICH DESIGNEDGAS OR LIQUID
SUBSTITUTES & CROSS-REFERENCES 2
438031Reference document
Same NSN cross-reference
Reference document — Design control — primary reference
A4743Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusCancelled· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is HC26-51-17A1?
HC26-51-17A1 is a SWITCH,THERMOSTATIC.
What parts can replace HC26-51-17A1?
There are 2 known substitutes for HC26-51-17A1: 438031, A4743. Substitute compatibility should be verified for your specific system.
What is the NSN for HC26-51-17A1?
HC26-51-17A1 is cataloged in the U.S. Government catalog under NSN 5930-00-474-7389. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.