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PartsTable / COMPONENT / 8168906
8168906 ✓ 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: CORK AND RUBBER SYNTHETIC OVERALL, thickness: 0.312 INCHES NOMINAL IN, hole_diameter: 1.312 INCHES NOMINAL IN, hardness_rating: 60.0 DUROMETER MINIMUM AND 75.0 DUROMETER MAXIMUM, overall_diameter: 2.000 INCHES NOMINAL IN, peripheral_shape_style: ROUND. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-569-5733, 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
8168906
NSN: 5310-00-569-5733
FSC: 5310
CAGE: 18876 — US ARMY AVIATION AND MISSILE COMMAND (USA)
SPECIFICATIONS
materialCORK AND RUBBER SYNTHETIC OVERALL
thickness0.312 INCHES NOMINAL IN
hole_diameter1.312 INCHES NOMINAL IN
hardness_rating60.0 DUROMETER MINIMUM AND 75.0 DUROMETER MAXIMUM
overall_diameter2.000 INCHES NOMINAL IN
peripheral_shape_styleROUND
center_hole_shape_styleROUND
cross-sectional_shape_styleRECTANGULAR
material_document_and_classificationMIL-C-6183 CL 2 GRADE MEDIUM MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
NSN5310-00-569-5733
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 8168906 · 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
•
CROSS-SECTIONAL SHAPE STYLE: RECTANGULAR
•
MATERIAL DOCUMENT AND CLASSIFICATION: MIL-C-6183 CL 2 GRADE MEDIUM MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
•
MATERIAL: CORK AND RUBBER SYNTHETIC OVERALL
•
HOLE DIAMETER: 1.312 INCHES NOMINAL IN
•
CENTER HOLE SHAPE STYLE: ROUND
•
OVERALL DIAMETER: 2.000 INCHES NOMINAL IN
•
THICKNESS: 0.312 INCHES NOMINAL IN
•
HARDNESS RATING: 60.0 DUROMETER MINIMUM AND 75.0 DUROMETER MAXIMUM
TECHNICAL CHARACTERISTICS (FLIS)
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-C-6183 CL 2 GRADE MEDIUM MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
MATERIALCORK AND RUBBER SYNTHETIC OVERALL
HOLE DIAMETER1.312 INCHES NOMINAL IN
CENTER HOLE SHAPE STYLEROUND
OVERALL DIAMETER2.000 INCHES NOMINAL IN
THICKNESS0.312 INCHES NOMINAL IN
HARDNESS RATING60.0 DUROMETER MINIMUM AND 75.0 DUROMETER MAXIMUM
PERIPHERAL SHAPE STYLEROUND
VERIFIED SUBSTITUTES & CROSS-REFERENCES 10
304-53Interchangeable
interchangeable cross-reference
interchangeable
K128-18Interchangeable
interchangeable cross-reference
interchangeable
EA3-48590-18Interchangeable
interchangeable cross-reference
interchangeable
935241-6Interchangeable
interchangeable cross-reference
interchangeable
B41Interchangeable
interchangeable cross-reference
interchangeable
A-A-59213-1-1-B-GInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 8168906?
8168906 is a WASHER,FLAT.
What parts can replace 8168906?
There are 10 known substitutes for 8168906: 304-53, K128-18, EA3-48590-18 and 7 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 8168906?
8168906 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-569-5733. 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