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PartsTable / COMPONENT / LN9
LN9 ✓ Verified by PartsTable
— · NUT WASHER
WHAT YOU NEED TO KNOW
Match nut grade to bolt grade for full strength Lock nuts prevent loosening under vibration
Don't mix grades — weakens the joint
PRODUCT OVERVIEW

The NUT,PLAIN,KNURLED is a the manufacturer industrial component. Key specifications include material: COPPER ALLOY OVERALL, nut_style: KNURLED, knurl_width: 0.219 INCHES MAXIMUM IN, nut_diameter: 0.748 INCHES MINIMUM AND 0.752 INCHES MAXIMUM IN, thread_class: 2B, nut_thickness: 0.344 INCHES NOMINAL IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-567-3683, 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
LN9
NSN: 5310-00-567-3683
FSC: 5310
CAGE: 79934 — THE TIRE & RIM ASSOCIATION INC (USA)
SPECIFICATIONS
materialCOPPER ALLOY OVERALL
nut_styleKNURLED
knurl_width0.219 INCHES MAXIMUM IN
nut_diameter0.748 INCHES MINIMUM AND 0.752 INCHES MAXIMUM IN
thread_class2B
nut_thickness0.344 INCHES NOMINAL IN
thread_seriesUNEF
small_end_length0.125 INCHES NOMINAL IN
thread_directionRIGHT-HAND
surface_treatmentNICKEL OVERALL
small_end_diameter0.609 INCHES NOMINAL IN
nominal_thread_size0.312 INCHES IN
NSN5310-00-567-3683
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: LN9 · OEM ⚠ VERIFY BEFORE ORDERING Grade matters for torque spec — don't mix grades. A Grade 5 nut on a Grade 8 bolt weakens the joint. Lock nuts, wing nuts, and castle nuts are NOT interchangeable with standard hex ✓ BROKER TIP Match nut to bolt thread class and material. Stainless bolt + zinc nut = galvanic corrosion. Always verify finish matches (plain, zinc, hot-dip galvanized) PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
MATERIAL: COPPER ALLOY OVERALL
•
KNURL WIDTH: 0.219 INCHES MAXIMUM IN
•
SURFACE TREATMENT: NICKEL OVERALL
•
THREAD SERIES: UNEF
•
THREAD QUANTITY PER INCH: 32
•
NOMINAL THREAD SIZE: 0.312 INCHES IN
•
NUT DIAMETER: 0.748 INCHES MINIMUM AND 0.752 INCHES MAXIMUM IN
•
NUT THICKNESS: 0.344 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
MATERIALCOPPER ALLOY OVERALL
KNURL WIDTH0.219 INCHES MAXIMUM IN
SURFACE TREATMENTNICKEL OVERALL
THREAD SERIESUNEF
THREAD QUANTITY PER INCH32
NOMINAL THREAD SIZE0.312 INCHES IN
NUT DIAMETER0.748 INCHES MINIMUM AND 0.752 INCHES MAXIMUM IN
NUT THICKNESS0.344 INCHES NOMINAL IN
THREAD DIRECTIONRIGHT-HAND
SMALL END DIAMETER0.609 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 15
21X94526Interchangeable
interchangeable cross-reference
interchangeable
29363HInterchangeable
interchangeable cross-reference
interchangeable
3863Interchangeable
interchangeable cross-reference
interchangeable
3863-0Interchangeable
interchangeable cross-reference
interchangeable
C70-4773-519Interchangeable
interchangeable cross-reference
interchangeable
3279613Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is LN9?
LN9 is a NUT,PLAIN,KNURLED.
What parts can replace LN9?
There are 15 known substitutes for LN9: 21X94526, 29363H, 3863 and 12 more. Substitute compatibility should be verified for your specific system.
What is the NSN for LN9?
LN9 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-567-3683. 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