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8526109 ✓ 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: 0.125 INCHES NOMINAL IN, material: STEEL CORROSION RESISTING OVERALL, point_type: EXTENDED PRONG MITRE END OR EXTENDED PRONG BEVEL OR MODIFIED HAMMER LOCK, style_designator: STANDARD, underloop_length: 1.625 INCHES NOMINAL IN, surface_treatment: PASSIVATE OVERALL. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5315-00-236-8361, 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
8526109
NSN: 5315-00-236-8361
FSC: 5315
CAGE: 18876 — US ARMY AVIATION AND MISSILE COMMAND (USA)
SPECIFICATIONS
diameter0.125 INCHES NOMINAL IN
materialSTEEL CORROSION RESISTING OVERALL
point_typeEXTENDED PRONG MITRE END OR EXTENDED PRONG BEVEL OR MODIFIED HAMMER LOCK
style_designatorSTANDARD
underloop_length1.625 INCHES NOMINAL IN
surface_treatmentPASSIVATE OVERALL
NSN5315-00-236-8361
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 8526109 · 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
•
UNDERLOOP LENGTH: 1.625 INCHES NOMINAL IN
•
DIAMETER: 0.125 INCHES NOMINAL IN
•
POINT TYPE: EXTENDED PRONG MITRE END OR EXTENDED PRONG BEVEL OR MODIFIED HAMMER LOCK
•
SURFACE TREATMENT: PASSIVATE OVERALL
•
MATERIAL: STEEL CORROSION RESISTING OVERALL
•
STYLE DESIGNATOR: STANDARD
TECHNICAL CHARACTERISTICS (FLIS)
UNDERLOOP LENGTH1.625 INCHES NOMINAL IN
DIAMETER0.125 INCHES NOMINAL IN
POINT TYPEEXTENDED PRONG MITRE END OR EXTENDED PRONG BEVEL OR MODIFIED HAMMER LOCK
SURFACE TREATMENTPASSIVATE OVERALL
MATERIALSTEEL CORROSION RESISTING OVERALL
STYLE DESIGNATORSTANDARD
VERIFIED SUBSTITUTES & CROSS-REFERENCES 2
59D8Interchangeable
IBM 1.2TB 10k RPM 2.5 SAS Sff3 HDD
interchangeable
AN381-4-26Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 8526109?
8526109 is a PIN,COTTER.
What parts can replace 8526109?
There are 2 known substitutes for 8526109: 59D8, AN381-4-26. Substitute compatibility should be verified for your specific system.
Is 8526109 still available?
8526109 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