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51A1A27 ✓ Verified by PartsTable
— · COMPONENT
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 GUARD,SWITCH is a the manufacturer industrial component. Key specifications include material: STEEL, overall_width: 0.750 INCHES NOMINAL IN, overall_height: 0.500 INCHES NOMINAL IN, overall_length: 2.150 INCHES NOMINAL IN, mounting_method: UNTHREADED HOLE(S), surface_treatment: ZINC. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5930-00-617-6611, 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
51A1A27
NSN: 5930-00-617-6611
FSC: 5930
CAGE: 81640 — SAFRAN POWER USA, LLC (USA)
SPECIFICATIONS
materialSTEEL
overall_width0.750 INCHES NOMINAL IN
overall_height0.500 INCHES NOMINAL IN
overall_length2.150 INCHES NOMINAL IN
mounting_methodUNTHREADED HOLE(S)
surface_treatmentZINC
unthreaded_mounting_hole_diameter0.475 INCHES NOMINAL IN
NSN5930-00-617-6611
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available GUARD,SWITCH TITLE COMPONENT PN 51A1A27 MFR GUARD,SWITCH
KEY FEATURES
•
SURFACE TREATMENT: ZINC
•
MATERIAL: STEEL
•
MOUNTING METHOD: UNTHREADED HOLE(S)
•
UNTHREADED MOUNTING HOLE DIAMETER: 0.475 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
OVERALL WIDTH0.750 INCHES NOMINAL IN
SURFACE TREATMENTZINC
MATERIALSTEEL
OVERALL HEIGHT0.500 INCHES NOMINAL IN
MOUNTING METHODUNTHREADED HOLE(S)
UNTHREADED MOUNTING HOLE DIAMETER0.475 INCHES NOMINAL IN
OVERALL LENGTH2.150 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 24
MS25452-1Interchangeable
interchangeable cross-reference
interchangeable
49-1356Interchangeable
interchangeable cross-reference
interchangeable
MILG7703Interchangeable
interchangeable cross-reference
interchangeable
MS25214-1Interchangeable
interchangeable cross-reference
interchangeable
MIL-DTL-7703Interchangeable
interchangeable cross-reference
interchangeable
MS25034Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 51A1A27?
51A1A27 is a GUARD,SWITCH.
What parts can replace 51A1A27?
There are 24 known substitutes for 51A1A27: MS25452-1, 49-1356, MILG7703 and 21 more. Substitute compatibility should be verified for your specific system.
Is 51A1A27 still available?
51A1A27 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026