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PartsTable / COMPONENT / ML620-31
ML620-31 ✓ 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,SLEEVE is a the manufacturer industrial component. Key specifications include material: ALUMINUM ALLOY 2017 OR ALUMINUM ALLOY 2024 OVERALL, nut_style: SLEEVE, nut_length: 0.482 INCHES MINIMUM AND 0.486 INCHES MAXIMUM IN, nut_diameter: 0.217 INCHES MINIMUM AND 0.221 INCHES MAXIMUM IN, thread_class: 2B, thread_length: 0.156 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED 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 5310-00-860-9523, 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
ML620-31
NSN: 5310-00-860-9523
FSC: 5310
CAGE: 55482 — MOUNT LOK PRODUCTS INC (USA)
SPECIFICATIONS
materialALUMINUM ALLOY 2017 OR ALUMINUM ALLOY 2024 OVERALL
nut_styleSLEEVE
nut_length0.482 INCHES MINIMUM AND 0.486 INCHES MAXIMUM IN
nut_diameter0.217 INCHES MINIMUM AND 0.221 INCHES MAXIMUM IN
thread_class2B
thread_length0.156 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN
thread_seriesUNIFIED NATIONAL COARSE (UNC)
flange_diameter0.344 INCHES NOMINAL IN
flange_thickness0.062 INCHES NOMINAL IN
thread_directionRIGHT-HAND
surface_treatmentANODIZE OVERALL
nominal_thread_size0.164 INCHES IN
NSN5310-00-860-9523
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: ML620-31 · 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
•
CROSS-SECTIONAL SHAPE: ROUND NUT
•
NUT DIAMETER: 0.217 INCHES MINIMUM AND 0.221 INCHES MAXIMUM IN
•
SURFACE TREATMENT: ANODIZE OVERALL
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-A-225/5,TEMPER T4 FED SPEC 1ST MATERIAL RESPONSE OR QQ-A-225/6,TEMPER T4 FED SPEC 2ND MATERIAL RESPONSE OR QQ-A-200/3,TEMPER T4 FED SPEC 2ND MATERIAL RESPONSE OVERALL
•
FLANGE DIAMETER: 0.344 INCHES NOMINAL IN
•
FLANGE THICKNESS: 0.062 INCHES NOMINAL IN
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: MIL-A-8625,TY 1,CL 1 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
•
MATERIAL: ALUMINUM ALLOY 2017 OR ALUMINUM ALLOY 2024 OVERALL
TECHNICAL CHARACTERISTICS (FLIS)
CROSS-SECTIONAL SHAPEROUND NUT
NUT DIAMETER0.217 INCHES MINIMUM AND 0.221 INCHES MAXIMUM IN
SURFACE TREATMENTANODIZE OVERALL
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-A-225/5,TEMPER T4 FED SPEC 1ST MATERIAL RESPONSE OR QQ-A-225/6,TEMPER T4 FED SPEC 2ND MATERIAL RESPONSE OR QQ-A-200/3,TEMPER T4 FED SPEC 2ND MATERIAL RESPONSE OVERALL
FLANGE DIAMETER0.344 INCHES NOMINAL IN
FLANGE THICKNESS0.062 INCHES NOMINAL IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONMIL-A-8625,TY 1,CL 1 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
MATERIALALUMINUM ALLOY 2017 OR ALUMINUM ALLOY 2024 OVERALL
THREAD SERIESUNIFIED NATIONAL COARSE (UNC)
NOMINAL THREAD SIZE0.164 INCHES IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 3
10107429Interchangeable
interchangeable cross-reference
interchangeable
002651Interchangeable
interchangeable cross-reference
interchangeable
MS19060-5Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is ML620-31?
ML620-31 is a NUT,SLEEVE.
What parts can replace ML620-31?
There are 3 known substitutes for ML620-31: 10107429, 002651, MS19060-5. Substitute compatibility should be verified for your specific system.
What is the NSN for ML620-31?
ML620-31 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-860-9523. 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