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PartsTable / COMPONENT / KNHXH420J
KNHXH420J ✓ Verified by PartsTable
— · BOLT SCREW
WHAT YOU NEED TO KNOW
Grade/class stamped on head determines strength Metric and imperial threads look similar — measure pitch
Verify thread pitch — metric != imperial
PRODUCT OVERVIEW

The INSERT,SCREW THREAD is a the manufacturer industrial component. Key specifications include length: 0.375 INCHES NOMINAL IN, material: STEEL COMP 303 OVERALL, insert_size: 0.500-13 UNC-2A A, thread_class: 3B, style_designator: KEYLOCK, surface_treatment: PASSIVATE OVERALL. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5325-01-191-2795, 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
KNHXH420J
NSN: 5325-01-191-2795
FSC: 5325
CAGE: 29372 — HOWMET GLOBAL FASTENING SYSTEMS INC. DIV TRIDAIR PRODUCTS (USA)
SPECIFICATIONS
length0.375 INCHES NOMINAL IN
materialSTEEL COMP 303 OVERALL
insert_size0.500-13 UNC-2A A
thread_class3B
style_designatorKEYLOCK
surface_treatmentPASSIVATE OVERALL
nominal_thread_size0.250 INCHES IN
thread_quantity_per_inch20
thread_series_designatorUNJC
full_internal_thread_length0.305 INCHES NOMINAL IN
internal_thread_relief_depth0.070 INCHES NOMINAL IN
material_document_and_classificationASTM A582 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
NSN5325-01-191-2795
COMPONENT DIAGRAM
BOLT / SCREW — THREAD VERIFICATION REQUIRED Hex HEAD LENGTH: — THREAD: — × — MATERIAL: — PN: KNHXH420J · OEM ⚠ VERIFY BEFORE ORDERING Verify thread pitch before ordering — metric (M8×1.25) ≠ imperial (5/16-18). Wrong thread = wrong part. Grade/class stamped on bolt head determines tensile strength ✓ BROKER TIP Grade/class stamped on head determines tensile strength. Grade 8 > Grade 5 > Grade 2. Always confirm head marking matches specification requirement PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
STYLE DESIGNATOR: KEYLOCK
•
THREAD SERIES DESIGNATOR: UNJC
•
NOMINAL THREAD SIZE: 0.250 INCHES IN
•
SURFACE TREATMENT: PASSIVATE OVERALL
•
MATERIAL: STEEL COMP 303 OVERALL
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
•
MATERIAL DOCUMENT AND CLASSIFICATION: ASTM A582 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
•
LENGTH: 0.375 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
STYLE DESIGNATORKEYLOCK
THREAD SERIES DESIGNATORUNJC
NOMINAL THREAD SIZE0.250 INCHES IN
SURFACE TREATMENTPASSIVATE OVERALL
MATERIALSTEEL COMP 303 OVERALL
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
MATERIAL DOCUMENT AND CLASSIFICATIONASTM A582 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
LENGTH0.375 INCHES NOMINAL IN
INSERT SIZE0.500-13 UNC-2A A
INTERNAL THREAD RELIEF DEPTH0.070 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 8
K9905-1024Interchangeable
interchangeable cross-reference
interchangeable
MIL-I-45914Interchangeable
interchangeable cross-reference
interchangeable
MS51830CA106Interchangeable
interchangeable cross-reference
interchangeable
MS51831CA108Interchangeable
interchangeable cross-reference
interchangeable
MS51832-201LInterchangeable
interchangeable cross-reference
interchangeable
KNHXH420Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is KNHXH420J?
KNHXH420J is a INSERT,SCREW THREAD.
What parts can replace KNHXH420J?
There are 8 known substitutes for KNHXH420J: K9905-1024, MIL-I-45914, MS51830CA106 and 5 more. Substitute compatibility should be verified for your specific system.
What is the NSN for KNHXH420J?
KNHXH420J is cataloged in the Federal Logistics Information System (FLIS) under NSN 5325-01-191-2795. This indicates validated use in U.S. government and defense supply chains.
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PartsTable Design LLC · partstable.com
Last verified: July 2026