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THD420L ✓ 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 INSERTER,SCREW THREAD INSERT is a the manufacturer industrial component. Key specifications include thread_size_and_series/type_designator: 1/4-20 UNIFIED NATIONAL COARSE (UNC). This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5120-01-074-5211, 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
THD420L
NSN: 5120-01-074-5211
FSC: 5120
CAGE: 29372 — HOWMET GLOBAL FASTENING SYSTEMS INC. DIV TRIDAIR PRODUCTS (USA)
SPECIFICATIONS
functional_descriptionUSED TO INSTALL TRIDAIR HEAVY DUTY KEENSERT SCREW THREAD INSERTS NO. KNH420J (NON-LOCKING) AND KNHL420J (INTERNAL THREAD LOCKING)
thread_size_and_series/type_designator1/4-20 UNIFIED NATIONAL COARSE (UNC)
NSN5120-01-074-5211
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available INSERTER,SCREW THREAD INSERT TITLE COMPONENT PN THD420L MFR INSERTER,SCREW THREAD
KEY FEATURES
•
THREAD SIZE AND SERIES/TYPE DESIGNATOR: 1/4-20 UNIFIED NATIONAL COARSE (UNC)
•
FUNCTIONAL DESCRIPTION: USED TO INSTALL TRIDAIR HEAVY DUTY KEENSERT SCREW THREAD INSERTS NO. KNH420J (NON-LOCKING) AND KNHL420J (INTERNAL THREAD LOCKING)
TECHNICAL CHARACTERISTICS (FLIS)
THREAD SIZE AND SERIES/TYPE DESIGNATOR1/4-20 UNIFIED NATIONAL COARSE (UNC)
FUNCTIONAL DESCRIPTIONUSED TO INSTALL TRIDAIR HEAVY DUTY KEENSERT SCREW THREAD INSERTS NO. KNH420J (NON-LOCKING) AND KNHL420J (INTERNAL THREAD LOCKING)
VERIFIED SUBSTITUTES & CROSS-REFERENCES 18
25020Interchangeable
interchangeable cross-reference
interchangeable
8735784Interchangeable
interchangeable cross-reference
interchangeable
56976AInterchangeable
interchangeable cross-reference
interchangeable
5D430-001Interchangeable
interchangeable cross-reference
interchangeable
25000Interchangeable
interchangeable cross-reference
interchangeable
DY-105/GRC-9XInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is THD420L?
THD420L is a INSERTER,SCREW THREAD INSERT.
What parts can replace THD420L?
There are 18 known substitutes for THD420L: 25020, 8735784, 56976A and 15 more. Substitute compatibility should be verified for your specific system.
What is the NSN for THD420L?
THD420L is cataloged in the Federal Logistics Information System (FLIS) under NSN 5120-01-074-5211. 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