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1800-3978-1 — SWITCH,ROTARY

✓ Government record, cited
— · MRO · MRO_GENERAL
PRODUCT OVERVIEW

1800-3978-1: SWITCH,ROTARY.

The SWITCH,ROTARY is a the manufacturer industrial component. Key specifications include thread_class: 2A SINGLE MOUNTING FACILITY A, terminal_type: PIN, thread_length: 0.160 INCHES MINIMUM AND 0.175 INCHES MAXIMUM SINGLE MOUNTING FACILITY IN, overall_length: 1.482 INCHES MINIMUM AND 1.567 INCHES MAXIMUM IN, mounting_method: THREADED BUSHING SINGLE MOUNTING FACILITY, overall_diameter: 0.485 INCHES MINIMUM AND 0.515 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5930-01-497-7293, 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
MRO→ MRO_GENERAL→ 1800-3978-1
NSN: 5930-01-497-7293
FSC: 5930 — Switches
CAGE: 31946 — COLE INSTRUMENT CORP. DBA COLE INSTRUMENTS (USA)
SPECIFICATIONS
thread_class2A SINGLE MOUNTING FACILITY A
terminal_typePIN
thread_length0.160 INCHES MINIMUM AND 0.175 INCHES MAXIMUM SINGLE MOUNTING FACILITY IN
overall_length1.482 INCHES MINIMUM AND 1.567 INCHES MAXIMUM IN
mounting_methodTHREADED BUSHING SINGLE MOUNTING FACILITY
overall_diameter0.485 INCHES MINIMUM AND 0.515 INCHES MAXIMUM IN
style_designatorSNAP OR LINE
nominal_thread_size0.250 INCHES SINGLE MOUNTING FACILITY IN
thread_pitch_diameters+0.2447 TO 0.2491 INCHES SINGLE MOUNTING FACILITY IN
thread_quantity_per_inch40 SINGLE MOUNTING FACILITY
thread_series_designatorUNS SINGLE MOUNTING FACILITY
contact_load_current_rating30.0 MILLIAMPERES INDUCTIVE LOAD AC AT SEA LEVEL
NSN5930-01-497-7293
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available SWITCH,ROTARY TITLE COMPONENT PN 1800-3978-1 MFR SWITCH,ROTARY
KEY FEATURES
•
SWITCH CONTACT BASIC DESIGN: NONPILE-UP SYMMETRICAL
•
TERMINAL TYPE: PIN
•
OVERALL DIAMETER: 0.485 INCHES MINIMUM AND 0.515 INCHES MAXIMUM IN
•
CONTACT LOAD CURRENT RATING: 150.0 MILLIAMPERES RESISTIVE LOAD DC AT SEA LEVEL
•
MOUNTING METHOD: THREADED BUSHING SINGLE MOUNTING FACILITY
•
THREAD LENGTH: 0.160 INCHES MINIMUM AND 0.175 INCHES MAXIMUM SINGLE MOUNTING FACILITY IN
•
STYLE DESIGNATOR: SNAP OR LINE
TECHNICAL CHARACTERISTICS
SWITCH CONTACT BASIC DESIGNNONPILE-UP SYMMETRICAL
TERMINAL TYPEPIN
OVERALL DIAMETER0.485 INCHES MINIMUM AND 0.515 INCHES MAXIMUM IN
CONTACT LOAD CURRENT RATING150.0 MILLIAMPERES RESISTIVE LOAD DC AT SEA LEVEL
CONTACT LOAD CURRENT RATING30.0 MILLIAMPERES INDUCTIVE LOAD AC AT SEA LEVEL
MOUNTING METHODTHREADED BUSHING SINGLE MOUNTING FACILITY
THREAD LENGTH0.160 INCHES MINIMUM AND 0.175 INCHES MAXIMUM SINGLE MOUNTING FACILITY IN
STYLE DESIGNATORSNAP OR LINE
INDIVIDUAL SECTION QUANTITY1
THREAD PITCH DIAMETERS+0.2447 TO 0.2491 INCHES SINGLE MOUNTING FACILITY IN
OTHER ITEMS IN FSC 5930 — Switches
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5930-00-000-0117 5930-00-001-1407 5930-00-001-1890 5930-00-001-2571 5930-00-001-2575 5930-00-001-2580 5930-00-001-2608 5930-00-001-2609
SUBSTITUTES & CROSS-REFERENCES 1
S235A309-2Reference document
Same NSN cross-reference
Reference document — Vendor item drawing reference
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 1800-3978-1?
1800-3978-1 is a SWITCH,ROTARY. It is classified as a MRO (MRO_GENERAL).
What parts can replace 1800-3978-1?
There is 1 known substitute for 1800-3978-1: S235A309-2. Substitute compatibility should be verified for your specific system.
What is the NSN for 1800-3978-1?
1800-3978-1 is cataloged in the U.S. Government catalog under NSN 5930-01-497-7293. 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.