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Technical Data Sheet
PartsTable / COMPONENT / 66-18
66-18 ✓ 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

RESISTOR,VARIABLE,WIRE WOUND,NON. Key specifications include material: STEEL OVERALL, body_style: BUSHING MOUNTED, stage_type: DOUBLE, prong_length: 0.344 INCHES NOMINAL IN, body_diameter: 0.870 INCHES MAXIMUM IN, opening_width: 0.166 INCHES MINIMUM AND 0.172 INCHES MAXIMUM IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5315-00-049-3705, 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
66-18
NSN: 5315-00-049-3705
FSC: 5315
CAGE: 96152 — BORG-WARNER CORP MARVEL-SCHEBLER/TILLOTSON DIV (USA)
SPECIFICATIONS
materialSTEEL OVERALL
body_styleBUSHING MOUNTED
stage_typeDOUBLE
prong_length0.344 INCHES NOMINAL IN
body_diameter0.870 INCHES MAXIMUM IN
opening_width0.166 INCHES MINIMUM AND 0.172 INCHES MAXIMUM IN
overall_width6.250 INCHES NOMINAL IN
aperture_width2.724 INCHES NOMINAL IN
bushing_length0.650 INCHES MINIMUM IN
inclosure_typeFULLY INCLOSED
overall_height4.500 INCHES NOMINAL IN
overall_length16.375 INCHES NOMINAL IN
NSN5315-00-049-3705
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 66-18 · 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
•
WIRE STOCK DIAMETER: 0.059 INCHES NOMINAL IN
•
OPENING WIDTH: 0.166 INCHES MINIMUM AND 0.172 INCHES MAXIMUM IN
•
PRONG LENGTH: 0.344 INCHES NOMINAL IN
•
MATERIAL: STEEL OVERALL
•
STYLE DESIGNATOR: LOCK
•
SURFACE TREATMENT: CADMIUM OVERALL
TECHNICAL CHARACTERISTICS (FLIS)
WIRE STOCK DIAMETER0.059 INCHES NOMINAL IN
OPENING WIDTH0.166 INCHES MINIMUM AND 0.172 INCHES MAXIMUM IN
PRONG LENGTH0.344 INCHES NOMINAL IN
MATERIALSTEEL OVERALL
STYLE DESIGNATORLOCK
SURFACE TREATMENTCADMIUM OVERALL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 12
B592-20Interchangeable
interchangeable cross-reference
interchangeable
592B006618Interchangeable
interchangeable cross-reference
interchangeable
6618Interchangeable
interchangeable cross-reference
interchangeable
6610Interchangeable
interchangeable cross-reference
interchangeable
S6618Interchangeable
interchangeable cross-reference
interchangeable
800021Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 66-18?
66-18 is a RESISTOR,VARIABLE,WIRE WOUND,NON.
What parts can replace 66-18?
There are 12 known substitutes for 66-18: B592-20, 592B006618, 6618 and 9 more. Substitute compatibility should be verified for your specific system.
Is 66-18 still available?
66-18 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