PartsTable
Technical Data Sheet
LL-21 ✓ Verified by PartsTable
· COMPONENT
WHAT YOU NEED TO KNOW
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PRODUCT OVERVIEW

SOCKET,PLUG-IN ELECTRONIC COMPON. Key specifications include material: STEEL, thickness: 0.312 INCHES NOMINAL IN, bore_diameter: 0.4370 INCHES NOMINAL IN, outside_diameter: 1.250 INCHES NOMINAL IN, style_designator: ROUND, SINGLE BOLT SECURED, surface_treatment: PASSIVATE. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 3040-00-918-4532, 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
LL-21
NSN: 3040-00-918-4532
FSC: 3040
CAGE: 00141 — ROLLER BEARING CO OF AMERICA, INC DIV PIC DESIGN (USA)
SPECIFICATIONS
materialSTEEL
thickness0.312 INCHES NOMINAL IN
bore_diameter0.4370 INCHES NOMINAL IN
outside_diameter1.250 INCHES NOMINAL IN
style_designatorROUND, SINGLE BOLT SECURED
surface_treatmentPASSIVATE
nominal_thread_size0.138 INCHES IN
plain_hole_diameter0.1470 INCHES NOMINAL IN
clamp_securing_hole_styleTHREADED
screw_thread_series_designatorUNIFIED NATIONAL COARSE (UNC)
NSN3040-00-918-4532
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available SOCKET,PLUG-IN ELECTRONIC COMPON TITLE COMPONENT PN LL-21 MFR SOCKET,PLUG-IN ELECTRO
KEY FEATURES
THICKNESS: 0.312 INCHES NOMINAL IN
PLAIN HOLE DIAMETER: 0.1470 INCHES NOMINAL IN
OUTSIDE DIAMETER: 1.250 INCHES NOMINAL IN
MATERIAL: STEEL
STYLE DESIGNATOR: ROUND, SINGLE BOLT SECURED
SURFACE TREATMENT: PASSIVATE
SCREW THREAD SERIES DESIGNATOR: UNIFIED NATIONAL COARSE (UNC)
NOMINAL THREAD SIZE: 0.138 INCHES IN
TECHNICAL CHARACTERISTICS (FLIS)
THICKNESS0.312 INCHES NOMINAL IN
PLAIN HOLE DIAMETER0.1470 INCHES NOMINAL IN
OUTSIDE DIAMETER1.250 INCHES NOMINAL IN
MATERIALSTEEL
STYLE DESIGNATORROUND, SINGLE BOLT SECURED
SURFACE TREATMENTPASSIVATE
SCREW THREAD SERIES DESIGNATORUNIFIED NATIONAL COARSE (UNC)
NOMINAL THREAD SIZE0.138 INCHES IN
BORE DIAMETER0.4370 INCHES NOMINAL IN
CLAMP SECURING HOLE STYLETHREADED
VERIFIED SUBSTITUTES & CROSS-REFERENCES 9
L1-21Interchangeable
interchangeable cross-reference
interchangeable
CG-174Interchangeable
interchangeable cross-reference
interchangeable
8437441-2Interchangeable
interchangeable cross-reference
interchangeable
696829Interchangeable
interchangeable cross-reference
interchangeable
694222Interchangeable
interchangeable cross-reference
interchangeable
2057667Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is LL-21?
LL-21 is a SOCKET,PLUG-IN ELECTRONIC COMPON.
What parts can replace LL-21?
There are 9 known substitutes for LL-21: L1-21, CG-174, 8437441-2 and 6 more. Substitute compatibility should be verified for your specific system.
What is the NSN for LL-21?
LL-21 is cataloged in the Federal Logistics Information System (FLIS) under NSN 3040-00-918-4532. This indicates validated use in U.S. government and defense supply chains.
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