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Technical Data Sheet
PartsTable / COMPONENT / 5260066
5260066 ✓ 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 WASHER,FLAT is a the manufacturer industrial component. Key specifications include material: COPPER OVERALL, thickness: 0.060 INCHES NOMINAL IN, hole_diameter: 0.375 INCHES NOMINAL IN, overall_diameter: 0.562 INCHES NOMINAL IN, peripheral_shape_style: ROUND, center_hole_shape_style: ROUND. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-358-3797, 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
5260066
NSN: 5310-00-358-3797
FSC: 5310
CAGE: 44940 — CUMMINS POWER GENERATION INC. (USA)
SPECIFICATIONS
materialCOPPER OVERALL
thickness0.060 INCHES NOMINAL IN
hole_diameter0.375 INCHES NOMINAL IN
overall_diameter0.562 INCHES NOMINAL IN
peripheral_shape_styleROUND
center_hole_shape_styleROUND
cross-sectional_shape_styleRECTANGULAR
NSN5310-00-358-3797
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 5260066 · 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
•
HOLE DIAMETER: 0.375 INCHES NOMINAL IN
•
CROSS-SECTIONAL SHAPE STYLE: RECTANGULAR
•
PERIPHERAL SHAPE STYLE: ROUND
•
OVERALL DIAMETER: 0.562 INCHES NOMINAL IN
•
MATERIAL: COPPER OVERALL
•
CENTER HOLE SHAPE STYLE: ROUND
•
THICKNESS: 0.060 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
HOLE DIAMETER0.375 INCHES NOMINAL IN
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
PERIPHERAL SHAPE STYLEROUND
OVERALL DIAMETER0.562 INCHES NOMINAL IN
MATERIALCOPPER OVERALL
CENTER HOLE SHAPE STYLEROUND
THICKNESS0.060 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 13
115555Interchangeable
interchangeable cross-reference
interchangeable
EE42462Interchangeable
interchangeable cross-reference
interchangeable
020064Interchangeable
interchangeable cross-reference
interchangeable
843104Interchangeable
interchangeable cross-reference
interchangeable
8227133-01Interchangeable
interchangeable cross-reference
interchangeable
BA73139Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 5260066?
5260066 is a WASHER,FLAT.
What parts can replace 5260066?
There are 13 known substitutes for 5260066: 115555, EE42462, 020064 and 10 more. Substitute compatibility should be verified for your specific system.
Is 5260066 still available?
5260066 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