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Technical Data Sheet
M6377 ✓ 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: COPPER ALLOY 360 OVERALL, nut_style: HEXAGON, nut_height: 0.073 INCHES MINIMUM AND 0.078 INCHES MAXIMUM IN, thread_class: 2B, thread_series: UNEF, thread_direction: RIGHT-HAND. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-865-8066, 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
M6377
NSN: 5310-00-865-8066
FSC: 5310
CAGE: 01121 — ROCKWELL AUTOMATION, INC. DBA ROCKWELL AUTOMATION (USA)
SPECIFICATIONS
materialCOPPER ALLOY 360 OVERALL
nut_styleHEXAGON
nut_height0.073 INCHES MINIMUM AND 0.078 INCHES MAXIMUM IN
thread_class2B
thread_seriesUNEF
thread_directionRIGHT-HAND
precious_materialSILVER
surface_treatmentSILVER OVERALL
width_across_flats0.296 INCHES MINIMUM AND 0.328 INCHES MAXIMUM IN
nominal_thread_size0.215 INCHES IN
bearing_surface_typeCHAMFERED
thread_quantity_per_inch32
NSN5310-00-865-8066
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: M6377 · 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
WIDTH ACROSS FLATS: 0.296 INCHES MINIMUM AND 0.328 INCHES MAXIMUM IN
THREAD DIRECTION: RIGHT-HAND
NUT STYLE: HEXAGON
NOMINAL THREAD SIZE: 0.215 INCHES IN
BEARING SURFACE TYPE: CHAMFERED
THREAD SERIES: UNEF
THREAD QUANTITY PER INCH: 32
PRECIOUS MATERIAL: SILVER
TECHNICAL CHARACTERISTICS (FLIS)
WIDTH ACROSS FLATS0.296 INCHES MINIMUM AND 0.328 INCHES MAXIMUM IN
THREAD DIRECTIONRIGHT-HAND
NUT STYLEHEXAGON
NOMINAL THREAD SIZE0.215 INCHES IN
BEARING SURFACE TYPECHAMFERED
THREAD SERIESUNEF
THREAD QUANTITY PER INCH32
PRECIOUS MATERIALSILVER
SURFACE TREATMENTSILVER OVERALL
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-B-626 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 8
501547-2Interchangeable
interchangeable cross-reference
interchangeable
2VH10-1AV5Interchangeable
interchangeable cross-reference
interchangeable
101165Interchangeable
interchangeable cross-reference
interchangeable
9185Interchangeable
interchangeable cross-reference
interchangeable
FCDB-15120Interchangeable
interchangeable cross-reference
interchangeable
1150-800-2Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is M6377?
M6377 is a NUT,PLAIN,HEXAGON.
What parts can replace M6377?
There are 8 known substitutes for M6377: 501547-2, 2VH10-1AV5, 101165 and 5 more. Substitute compatibility should be verified for your specific system.
What is the NSN for M6377?
M6377 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-865-8066. This indicates validated use in U.S. government and defense supply chains.
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