PartsTable
Technical Data Sheet
PartsTable / MRO / 1SR4A1
1SR4A1 ✓ Verified by PartsTable
— · MRO · MRO_GENERAL
WHAT YOU NEED TO KNOW
Verify manufacturer and server generation compatibility Check if Option PN or Spare PN — same part, different channel
Confirm exact part number — similar PNs may be different parts
PRODUCT OVERVIEW

The SWITCH,ROTARY is a the manufacturer industrial component. Key specifications include shaft_type: ROUND, FLATTED, THREADED HOLE SINGLE ACTUATOR, flat_height: 0.219 INCHES NOMINAL SINGLE ACTUATOR IN, shaft_length: 1.188 INCHES NOMINAL SINGLE ACTUATOR IN, thread_class: 2A SINGLE MOUNTING FACILITY A, overall_width: 2.188 INCHES NOMINAL IN, terminal_type: THREADED STUD. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5930-01-173-7330, 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→ 1SR4A1
NSN: 5930-01-173-7330
FSC: 5930
CAGE: 81349 — MILITARY SPECIFICATIONS PROMULGATED BY MILITARY DEPARTMENTS/AGENCIES UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
SPECIFICATIONS
shaft_typeROUND, FLATTED, THREADED HOLE SINGLE ACTUATOR
flat_height0.219 INCHES NOMINAL SINGLE ACTUATOR IN
shaft_length1.188 INCHES NOMINAL SINGLE ACTUATOR IN
thread_class2A SINGLE MOUNTING FACILITY A
overall_width2.188 INCHES NOMINAL IN
terminal_typeTHREADED STUD
overall_height2.750 INCHES NOMINAL IN
overall_length3.928 INCHES NOMINAL IN
shaft_diameter0.250 INCHES NOMINAL SINGLE ACTUATOR IN
mounting_methodBRACKET(S) AND THREADED HOLE(S) SINGLE MOUNTING FACILITY
style_designatorTAP, CIRCUIT SELECTOR
features_providedACTUATOR KNOB
NSN5930-01-173-7330
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available SWITCH,ROTARY TITLE COMPONENT PN 1SR4A1 MFR SWITCH,ROTARY
KEY FEATURES
•
TEST DATA DOCUMENT: 81349-MIL-S-15291 SPECIFICATION (INCLUDES ENGINEERING TYPE BULLETINS, BROCHURES,ETC., THAT REFLECT SPECIFICATION TYPE DATA IN SPECIFICATION FORMAT; EXCLUDES COMMERCIAL CATALOGS, INDUSTRY DIRECTORIES, AND SIMILAR TRADE PUBLICATIONS, REFLECTING GENERAL TYPE DATA ON CERTAIN ENVIRONMENTAL AND PERFORMANCE REQUIREMENTS AND TEST CONDITIONS THAT ARE SHOWN AS "TYPICAL", "AVERAGE", "NOMINAL", ETC.).
•
SPECIFICATION/STANDARD DATA: 81349-MIL-S-15291/1 GOVERNMENT SPECIFICATION
•
MOUNTING FACILITY CIRCLE RADIUS: 1.156 INCHES NOMINAL SINGLE MOUNTING FACILITY IN
•
SWITCH ACTUATOR POSITIONING INCREMENT: 90.0 DEGREES SINGLE ACTUATOR
•
CONTACT VOLTAGE RATING IN VOLTS: 120.0 LOWEST DC VOLTAGE RATING AT SEA LEVEL
•
FEATURES PROVIDED: ACTUATOR KNOB
•
SWITCH ACTUATOR INDEXING POSITION QUANTITY: 4 SINGLE ACTUATOR
•
FIRST FLAT LENGTH: 0.750 INCHES NOMINAL SINGLE ACTUATOR IN
TECHNICAL CHARACTERISTICS (FLIS)
TEST DATA DOCUMENT81349-MIL-S-15291 SPECIFICATION (INCLUDES ENGINEERING TYPE BULLETINS, BROCHURES,ETC., THAT REFLECT SPECIFICATION TYPE DATA IN SPECIFICATION FORMAT; EXCLUDES COMMERCIAL CATALOGS, INDUSTRY DIRECTORIES, AND SIMILAR TRADE PUBLICATIONS, REFLECTING GENERAL TYPE DATA ON CERTAIN ENVIRONMENTAL AND PERFORMANCE REQUIREMENTS AND TEST CONDITIONS THAT ARE SHOWN AS "TYPICAL", "AVERAGE", "NOMINAL", ETC.).
SPECIFICATION/STANDARD DATA81349-MIL-S-15291/1 GOVERNMENT SPECIFICATION
MOUNTING FACILITY CIRCLE RADIUS1.156 INCHES NOMINAL SINGLE MOUNTING FACILITY IN
SWITCH ACTUATOR POSITIONING INCREMENT90.0 DEGREES SINGLE ACTUATOR
CONTACT VOLTAGE RATING IN VOLTS120.0 LOWEST DC VOLTAGE RATING AT SEA LEVEL
FEATURES PROVIDEDACTUATOR KNOB
SWITCH ACTUATOR INDEXING POSITION QUANTITY4 SINGLE ACTUATOR
FIRST FLAT LENGTH0.750 INCHES NOMINAL SINGLE ACTUATOR IN
CONTACT VOLTAGE RATING IN VOLTS500.0 HIGHEST AC VOLTAGE RATING AT SEA LEVEL
THREAD CLASS2A SINGLE MOUNTING FACILITY A
VERIFIED SUBSTITUTES & CROSS-REFERENCES 14
1SR4F1Interchangeable
interchangeable cross-reference
interchangeable
4055-16PC22Interchangeable
interchangeable cross-reference
interchangeable
SWH0538Interchangeable
interchangeable cross-reference
interchangeable
MIL-DTL-15291/1Interchangeable
interchangeable cross-reference
interchangeable
4055-16PC23Interchangeable
interchangeable cross-reference
interchangeable
J87-0122Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 1SR4A1?
1SR4A1 is a SWITCH,ROTARY. It is classified as a MRO (MRO_GENERAL).
What parts can replace 1SR4A1?
There are 14 known substitutes for 1SR4A1: 1SR4F1, 4055-16PC22, SWH0538 and 11 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 1SR4A1?
1SR4A1 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5930-01-173-7330. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026