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6426A ✓ 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: STEEL COMP 1040 OVERALL, thickness: 0.119 INCHES NOMINAL IN, hole_diameter: 1.524 INCHES MINIMUM AND 1.538 INCHES MAXIMUM IN, overall_diameter: 2.618 INCHES MINIMUM AND 2.632 INCHES MAXIMUM IN, peripheral_shape_style: ROUND, center_hole_shape_style: ROUND. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-188-4192, 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
6426A
NSN: 5310-00-188-4192
FSC: 5310
CAGE: 28265 — HERCULES ENGINE CO INC (USA)
SPECIFICATIONS
materialSTEEL COMP 1040 OVERALL
thickness0.119 INCHES NOMINAL IN
hole_diameter1.524 INCHES MINIMUM AND 1.538 INCHES MAXIMUM IN
overall_diameter2.618 INCHES MINIMUM AND 2.632 INCHES MAXIMUM IN
peripheral_shape_styleROUND
center_hole_shape_styleROUND
cross-sectional_shape_styleRECTANGULAR
material_document_and_classificationQQ-S-635 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
NSN5310-00-188-4192
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 6426A · 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
•
CENTER HOLE SHAPE STYLE: ROUND
•
HOLE DIAMETER: 1.524 INCHES MINIMUM AND 1.538 INCHES MAXIMUM IN
•
MATERIAL: STEEL COMP 1040 OVERALL
•
THICKNESS: 0.119 INCHES NOMINAL IN
•
PERIPHERAL SHAPE STYLE: ROUND
•
OVERALL DIAMETER: 2.618 INCHES MINIMUM AND 2.632 INCHES MAXIMUM IN
•
CROSS-SECTIONAL SHAPE STYLE: RECTANGULAR
•
MATERIAL DOCUMENT AND CLASSIFICATION: QQ-S-635 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
TECHNICAL CHARACTERISTICS (FLIS)
CENTER HOLE SHAPE STYLEROUND
HOLE DIAMETER1.524 INCHES MINIMUM AND 1.538 INCHES MAXIMUM IN
MATERIALSTEEL COMP 1040 OVERALL
THICKNESS0.119 INCHES NOMINAL IN
PERIPHERAL SHAPE STYLEROUND
OVERALL DIAMETER2.618 INCHES MINIMUM AND 2.632 INCHES MAXIMUM IN
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-S-635 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
VERIFIED SUBSTITUTES & CROSS-REFERENCES 4
67507Interchangeable
interchangeable cross-reference
interchangeable
510-222Interchangeable
interchangeable cross-reference
interchangeable
XRT8322Interchangeable
interchangeable cross-reference
interchangeable
20145-22Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 6426A?
6426A is a WASHER,FLAT.
What parts can replace 6426A?
There are 4 known substitutes for 6426A: 67507, 510-222, XRT8322 and 1 more. Substitute compatibility should be verified for your specific system.
Is 6426A still available?
6426A is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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Last verified: July 2026