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Technical Data Sheet
PartsTable / MRO / 1SR2A
1SR2A ✓ 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 thread_class: 2B SINGLE MOUNTING FACILITY, overall_width: 1.891 INCHES NOMINAL IN, terminal_type: THREADED STUD, overall_height: 1.891 INCHES NOMINAL IN, overall_length: 2.876 INCHES NOMINAL IN, mounting_method: BRACKET(S) AND THREADED HOLE(S) SINGLE MOUNTING FACILITY. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5930-01-233-1881, 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→ 1SR2A
NSN: 5930-01-233-1881
FSC: 5930
CAGE: 81349 — MILITARY SPECIFICATIONS PROMULGATED BY MILITARY DEPARTMENTS/AGENCIES UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M
SPECIFICATIONS
thread_class2B SINGLE MOUNTING FACILITY
overall_width1.891 INCHES NOMINAL IN
terminal_typeTHREADED STUD
overall_height1.891 INCHES NOMINAL IN
overall_length2.876 INCHES NOMINAL IN
mounting_methodBRACKET(S) AND THREADED HOLE(S) SINGLE MOUNTING FACILITY
style_designatorTAP, CIRCUIT SELECTOR
features_providedACTUATOR KNOB
nominal_thread_size0.190 INCHES SINGLE MOUNTING FACILITY IN
thread_quantity_per_inch24 SINGLE MOUNTING FACILITY
thread_series_designatorUNIFIED NATIONAL COARSE (UNC) SINGLE MOUNTING FACILITY
mounting_facility_patternFOUR POSITION CIRCULAR SINGLE MOUNTING FACILITY
NSN5930-01-233-1881
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available SWITCH,ROTARY TITLE COMPONENT PN 1SR2A MFR SWITCH,ROTARY
KEY FEATURES
•
CONTACT LOAD CURRENT RATING: 10.0 AMPERES RESISTIVE LOAD DC AT SEA LEVEL
•
INDIVIDUAL SECTION QUANTITY: 2
•
SPECIFICATION/STANDARD DATA: 81399-MIL-S-15291/1 GOVERNMENT SPECIFICATION
•
THREAD SERIES DESIGNATOR: UNIFIED NATIONAL COARSE (UNC) SINGLE MOUNTING FACILITY
•
THREAD CLASS: 2B SINGLE MOUNTING FACILITY
•
MOUNTING FACILITY CIRCLE RADIUS: 1.156 INCHES NOMINAL SINGLE MOUNTING FACILITY IN
TECHNICAL CHARACTERISTICS (FLIS)
CONTACT LOAD CURRENT RATING10.0 AMPERES RESISTIVE LOAD DC AT SEA LEVEL
OVERALL HEIGHT1.891 INCHES NOMINAL IN
INDIVIDUAL SECTION QUANTITY2
SPECIFICATION/STANDARD DATA81399-MIL-S-15291/1 GOVERNMENT SPECIFICATION
THREAD SERIES DESIGNATORUNIFIED NATIONAL COARSE (UNC) SINGLE MOUNTING FACILITY
THREAD CLASS2B SINGLE MOUNTING FACILITY
MOUNTING FACILITY CIRCLE RADIUS1.156 INCHES NOMINAL SINGLE MOUNTING FACILITY IN
OVERALL LENGTH2.876 INCHES NOMINAL IN
THREAD QUANTITY PER INCH24 SINGLE MOUNTING FACILITY
TERMINAL TYPETHREADED STUD
VERIFIED SUBSTITUTES & CROSS-REFERENCES 13
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 1SR2A?
1SR2A is a SWITCH,ROTARY. It is classified as a MRO (MRO_GENERAL).
What parts can replace 1SR2A?
There are 13 known substitutes for 1SR2A: 1SR4F1, 4055-16PC22, SWH0538 and 10 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 1SR2A?
1SR2A is cataloged in the Federal Logistics Information System (FLIS) under NSN 5930-01-233-1881. 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