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PartsTable / COMPONENT / X1806
X1806 ✓ 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 PIN,COTTER is a the manufacturer industrial component. Key specifications include diameter: 0.188 INCHES NOMINAL IN, material: STEEL COMP 1212 OVERALL, nut_style: HEXAGON, nut_height: 0.537 INCHES MINIMUM AND 0.557 INCHES MAXIMUM IN, thread_class: 3B, thread_series: UNIFIED NATIONAL COARSE (UNC). This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5315-00-010-3413, 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
X1806
NSN: 5315-00-010-3413
FSC: 5315
CAGE: 78500 — MERITOR HEAVY VEHICLE SYSTEMS, LLC (USA)
SPECIFICATIONS
diameter0.188 INCHES NOMINAL IN
materialSTEEL COMP 1212 OVERALL
nut_styleHEXAGON
nut_height0.537 INCHES MINIMUM AND 0.557 INCHES MAXIMUM IN
thread_class3B
thread_seriesUNIFIED NATIONAL COARSE (UNC)
style_designatorSTANDARD
thread_directionRIGHT-HAND
underloop_length2.500 INCHES NOMINAL IN
countersink_angle90.0 DEGREES NOMINAL NUT
surface_treatmentCADMIUM OVERALL
width_across_flats0.928 INCHES MINIMUM AND 0.948 INCHES MAXIMUM IN
NSN5315-00-010-3413
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: X1806 · 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
•
MATERIAL: STEEL OVERALL
•
DIAMETER: 0.188 INCHES NOMINAL IN
•
UNDERLOOP LENGTH: 2.500 INCHES NOMINAL IN
•
STYLE DESIGNATOR: STANDARD
TECHNICAL CHARACTERISTICS (FLIS)
MATERIALSTEEL OVERALL
DIAMETER0.188 INCHES NOMINAL IN
UNDERLOOP LENGTH2.500 INCHES NOMINAL IN
STYLE DESIGNATORSTANDARD
VERIFIED SUBSTITUTES & CROSS-REFERENCES 20
3-8X3-8Interchangeable
interchangeable cross-reference
interchangeable
QQA268Interchangeable
interchangeable cross-reference
interchangeable
2620Interchangeable
interchangeable cross-reference
interchangeable
20646DInterchangeable
interchangeable cross-reference
interchangeable
34GInterchangeable
interchangeable cross-reference
interchangeable
F67EInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is X1806?
X1806 is a PIN,COTTER.
What parts can replace X1806?
There are 20 known substitutes for X1806: 3-8X3-8, QQA268, 2620 and 17 more. Substitute compatibility should be verified for your specific system.
What is the NSN for X1806?
X1806 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5315-00-010-3413. 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