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66743 ✓ 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 TERMINAL,LUG is a the manufacturer industrial component. Key specifications include material: STEEL COMP 201 BAND, head_style: HEADLESS (SETSCREW), point_style: CUP, temp_rating: 250.0 FAHRENHEIT DEGF, thread_class: 3A A, overall_width: 0.750 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 5310-00-117-4788, 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
66743
NSN: 5310-00-117-4788
FSC: 5310
CAGE: 79807 — WROUGHT WASHER MFG., INC. (USA)
SPECIFICATIONS
materialSTEEL COMP 201 BAND
head_styleHEADLESS (SETSCREW)
point_styleCUP
temp_rating250.0 FAHRENHEIT DEGF
thread_class3A A
overall_width0.750 INCHES NOMINAL IN
thread_length0.250 INCHES MAXIMUM IN
overall_length0.781 INCHES IN
fastener_length0.250 INCHES NOMINAL IN
hardness_rating33.0 ROCKWELL C MINIMUM AND 40.0 ROCKWELL C MAXIMUM OVERALL
inside_diameter2.690 INCHES MINIMUM AND 2.930 INCHES MAXIMUM IN
locking_featurePATCH OR PELLET OR STRIP THREADS
NSN5310-00-117-4788
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 66743 · 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
VERIFIED SUBSTITUTES & CROSS-REFERENCES 23
B107.300 CAT 14 TY2CLAST1DEAInterchangeable
interchangeable cross-reference
interchangeable
535546Interchangeable
interchangeable cross-reference
interchangeable
J6063CInterchangeable
interchangeable cross-reference
interchangeable
75P3000Interchangeable
interchangeable cross-reference
interchangeable
DA6063Interchangeable
interchangeable cross-reference
interchangeable
14U1045PCDA6063Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 66743?
66743 is a TERMINAL,LUG.
What parts can replace 66743?
There are 23 known substitutes for 66743: B107.300 CAT 14 TY2CLAST1DEA, 535546, J6063C and 20 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 66743?
66743 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-117-4788. 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