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PartsTable / COMPONENT / A3521-4-3
A3521-4-3 ✓ 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 LENS,LIGHT is a the manufacturer industrial component. Key specifications include color: RED LENS, material: PLASTIC LENS, overall_length: 0.800 INCHES NOMINAL IN, mounting_method: CLIP, overall_diameter: 1.594 INCHES NOMINAL IN, style_designator: CONVEX. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 6210-00-243-0057, 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
A3521-4-3
NSN: 6210-00-243-0057
FSC: 6210
CAGE: 55631 — SCOMILL INC (USA)
SPECIFICATIONS
colorRED LENS
materialPLASTIC LENS
overall_length0.800 INCHES NOMINAL IN
mounting_methodCLIP
overall_diameter1.594 INCHES NOMINAL IN
style_designatorCONVEX
surface_conditionACID ETCHED BACK
effective_diameter1.375 INCHES NOMINAL IN
mounting_device_quantity4
light_transmission_designTRANSLUCENT LENS
NSN6210-00-243-0057
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available LENS,LIGHT TITLE COMPONENT PN A3521-4-3 MFR LENS,LIGHT
KEY FEATURES
•
MATERIAL: COPPER ALLOY HOLDER
•
SURFACE CONDITION: SMOOTH FACE
•
MOUNTING DEVICE QUANTITY: 4
•
OVERALL DIAMETER: 1.594 INCHES NOMINAL IN
•
MOUNTING METHOD: CLIP
•
EFFECTIVE DIAMETER: 1.375 INCHES NOMINAL IN
•
STYLE DESIGNATOR: CONVEX
TECHNICAL CHARACTERISTICS (FLIS)
MATERIALCOPPER ALLOY HOLDER
SURFACE CONDITIONSMOOTH FACE
SURFACE CONDITIONACID ETCHED BACK
MOUNTING DEVICE QUANTITY4
OVERALL DIAMETER1.594 INCHES NOMINAL IN
MOUNTING METHODCLIP
EFFECTIVE DIAMETER1.375 INCHES NOMINAL IN
STYLE DESIGNATORCONVEX
MATERIALPLASTIC LENS
COLORRED LENS
VERIFIED SUBSTITUTES & CROSS-REFERENCES 21
K3977Interchangeable
interchangeable cross-reference
interchangeable
3977Interchangeable
interchangeable cross-reference
interchangeable
875453C91Interchangeable
interchangeable cross-reference
interchangeable
7037091Interchangeable
interchangeable cross-reference
interchangeable
1047389Interchangeable
interchangeable cross-reference
interchangeable
294801Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is A3521-4-3?
A3521-4-3 is a LENS,LIGHT.
What parts can replace A3521-4-3?
There are 21 known substitutes for A3521-4-3: K3977, 3977, 875453C91 and 18 more. Substitute compatibility should be verified for your specific system.
Is A3521-4-3 still available?
A3521-4-3 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