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424221 ✓ 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,HEXAGON is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, thread_direction: RIGHT-HAND, nominal_thread_size: 16.0 MILLIMETERS MM, end_item_identification: 2320-01-529-2249, TRUCK, BOMB SERVICE, material_document_and_classification: DIN 934 CLASS 8 NATIONAL STD/SPEC SINGLE MATERIAL RESPONSE OVERALL, part_name_assigned_by_controlling_agency: HEX NUT M16X1.5. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-209-0787, 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
424221
NSN: 5310-00-209-0787
FSC: 5310
CAGE: 7X677 — GENERAL MOTORS LLC DBA GENERAL MOTORS LLC (USA)
SPECIFICATIONS
materialSTEEL OVERALL
thread_seriesM
thread_directionRIGHT-HAND
nominal_thread_size16.0 MILLIMETERS MM
end_item_identification2320-01-529-2249, TRUCK, BOMB SERVICE
material_document_and_classificationDIN 934 CLASS 8 NATIONAL STD/SPEC SINGLE MATERIAL RESPONSE OVERALL
part_name_assigned_by_controlling_agencyHEX NUT M16X1.5
NSN5310-00-209-0787
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 424221 · 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
•
OUTSIDE DIAMETER: 0.245 INCHES MINIMUM AND 0.255 INCHES MAXIMUM IN
•
MATERIAL THICKNESS: 0.018 INCHES NOMINAL IN
•
HOLE DIAMETER: 0.129 INCHES MINIMUM AND 0.136 INCHES MAXIMUM IN
•
STYLE DESIGNATOR: FLAT INTERNAL TEETH
TECHNICAL CHARACTERISTICS (FLIS)
MATERIALCOPPER ALLOY OVERALL
OUTSIDE DIAMETER0.245 INCHES MINIMUM AND 0.255 INCHES MAXIMUM IN
MATERIAL THICKNESS0.018 INCHES NOMINAL IN
HOLE DIAMETER0.129 INCHES MINIMUM AND 0.136 INCHES MAXIMUM IN
STYLE DESIGNATORFLAT INTERNAL TEETH
VERIFIED SUBSTITUTES & CROSS-REFERENCES 10
382706-2Interchangeable
interchangeable cross-reference
interchangeable
218079Interchangeable
interchangeable cross-reference
interchangeable
749797-34Interchangeable
interchangeable cross-reference
interchangeable
337666-1Interchangeable
interchangeable cross-reference
interchangeable
HC210-BKInterchangeable
interchangeable cross-reference
interchangeable
CD0010-QBNInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 424221?
424221 is a NUT,PLAIN,HEXAGON.
What parts can replace 424221?
There are 10 known substitutes for 424221: 382706-2, 218079, 749797-34 and 7 more. Substitute compatibility should be verified for your specific system.
Is 424221 still available?
424221 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