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Technical Data Sheet
PartsTable / COMPONENT / 4SD-SPL
4SD-SPL ✓ 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 JUNCTION BOX is a the manufacturer industrial component. Key specifications include body_width: 4.000 INCHES NOMINAL IN, body_length: 4.000 INCHES NOMINAL IN, inside_depth: 2.125 INCHES NOMINAL IN, style_designator: SQUARE-OPPOSITE CORNER TABS, entrance_quantity: 15, cover_attachment_method: SCREW. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5975-01-145-6770, 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
4SD-SPL
NSN: 5975-01-145-6770
FSC: 5975
CAGE: 03743 — EGS ELECTRICAL GROUP APPLETON DIV (USA)
SPECIFICATIONS
body_width4.000 INCHES NOMINAL IN
body_length4.000 INCHES NOMINAL IN
inside_depth2.125 INCHES NOMINAL IN
style_designatorSQUARE-OPPOSITE CORNER TABS
entrance_quantity15
cover_attachment_methodSCREW
cover_mounting_hole_quantity2
NSN5975-01-145-6770
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available JUNCTION BOX TITLE COMPONENT PN 4SD-SPL MFR JUNCTION BOX
KEY FEATURES
•
INSIDE DEPTH: 2.125 INCHES NOMINAL IN
•
BODY LENGTH: 4.000 INCHES NOMINAL IN
•
BODY WIDTH: 4.000 INCHES NOMINAL IN
•
ENTRANCE QUANTITY: 15
•
COVER MOUNTING HOLE QUANTITY: 2
•
STYLE DESIGNATOR: SQUARE-OPPOSITE CORNER TABS
•
COVER ATTACHMENT METHOD: SCREW
TECHNICAL CHARACTERISTICS (FLIS)
INSIDE DEPTH2.125 INCHES NOMINAL IN
BODY LENGTH4.000 INCHES NOMINAL IN
BODY WIDTH4.000 INCHES NOMINAL IN
ENTRANCE QUANTITY15
COVER MOUNTING HOLE QUANTITY2
STYLE DESIGNATORSQUARE-OPPOSITE CORNER TABS
COVER ATTACHMENT METHODSCREW
VERIFIED SUBSTITUTES & CROSS-REFERENCES 3
52171 1/2 3/4Interchangeable
interchangeable cross-reference
interchangeable
52171SPLInterchangeable
interchangeable cross-reference
interchangeable
A-A-59214Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 4SD-SPL?
4SD-SPL is a JUNCTION BOX.
What parts can replace 4SD-SPL?
There are 3 known substitutes for 4SD-SPL: 52171 1/2 3/4, 52171SPL, A-A-59214. Substitute compatibility should be verified for your specific system.
What is the NSN for 4SD-SPL?
4SD-SPL is cataloged in the Federal Logistics Information System (FLIS) under NSN 5975-01-145-6770. 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