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Technical Data Sheet
ML620-41 ✓ 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 2024 OR ALUMINUM ALLOY 2017 OVERALL, nut_style: SLEEVE, nut_length: 0.639 INCHES MINIMUM AND 0.643 INCHES MAXIMUM IN, nut_diameter: 0.217 INCHES MINIMUM AND 0.221 INCHES MAXIMUM IN, thread_class: 2B, thread_series: 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 5310-00-373-4954, 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
ML620-41
NSN: 5310-00-373-4954
FSC: 5310
CAGE: 55482 — MOUNT LOK PRODUCTS INC (USA)
SPECIFICATIONS
materialALUMINUM ALLOY 2024 OR ALUMINUM ALLOY 2017 OVERALL
nut_styleSLEEVE
nut_length0.639 INCHES MINIMUM AND 0.643 INCHES MAXIMUM IN
nut_diameter0.217 INCHES MINIMUM AND 0.221 INCHES MAXIMUM IN
thread_class2B
thread_seriesUNIFIED NATIONAL COARSE (UNC)
flange_diameter0.344 INCHES NOMINAL IN
flange_thickness0.062 INCHES NOMINAL IN
special_features2 HALF MOON SLOTS LOCATED AT 190 DEG ON FLANGE OUTSIDE DIA 0.044 IN. MIN0.049 IN. MAX DEEP 0.047 IN.RADIUS 0.062 IN.WIDE IN
thread_directionRIGHT-HAND
surface_treatmentANODIZE OVERALL
nominal_thread_size0.164 INCHES IN
NSN5310-00-373-4954
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: ML620-41 · 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
NOMINAL THREAD SIZE: 0.164 INCHES IN
CROSS-SECTIONAL SHAPE: ROUND FLANGE
THREAD CLASS: 2B
NUT STYLE: SLEEVE
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: MIL-A-8625 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
FLANGE DIAMETER: 0.344 INCHES NOMINAL IN
NUT COUNTERBORE DEPTH: 0.484 INCHES NOMINAL NUT IN
THREAD SERIES: UNIFIED NATIONAL COARSE (UNC)
TECHNICAL CHARACTERISTICS (FLIS)
NOMINAL THREAD SIZE0.164 INCHES IN
CROSS-SECTIONAL SHAPEROUND FLANGE
THREAD CLASS2B
NUT STYLESLEEVE
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONMIL-A-8625 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
FLANGE DIAMETER0.344 INCHES NOMINAL IN
NUT COUNTERBORE DEPTH0.484 INCHES NOMINAL NUT IN
THREAD SERIESUNIFIED NATIONAL COARSE (UNC)
COUNTERBORE DIAMETER0.166 INCHES MINIMUM AND 0.1695 INCHES MAXIMUM NUT IN
CROSS-SECTIONAL SHAPEROUND NUT
VERIFIED SUBSTITUTES & CROSS-REFERENCES 2
0026513Interchangeable
interchangeable cross-reference
interchangeable
26513Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is ML620-41?
ML620-41 is a NUT,SLEEVE.
What parts can replace ML620-41?
There are 2 known substitutes for ML620-41: 0026513, 26513. Substitute compatibility should be verified for your specific system.
What is the NSN for ML620-41?
ML620-41 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-373-4954. This indicates validated use in U.S. government and defense supply chains.
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