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189557 ✓ 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,LOCK is a the manufacturer industrial component. Key specifications include thread_series: UNS, special_features: ELECTRODEPOSITED CADMIUM PLATING FINISH PER OO-P-416, CLASS 2, TYPE II, end_item_identification: ASDE3, thread_quantity_per_inch: 18, part_name_assigned_by_controlling_agency: LOCKNUT. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-886-5432, 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
189557
NSN: 5310-00-886-5432
FSC: 5310
CAGE: 66503 — WOODWARD, INC. DIV FUEL SYSTEMS AND CONTROLS (USA)
SPECIFICATIONS
thread_seriesUNS
special_featuresELECTRODEPOSITED CADMIUM PLATING FINISH PER OO-P-416, CLASS 2, TYPE II
end_item_identificationASDE3
thread_quantity_per_inch18
part_name_assigned_by_controlling_agencyLOCKNUT
NSN5310-00-886-5432
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 189557 · 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
•
STYLE DESIGNATOR: SPLIT HELICAL-RIGHT HAND
•
MATERIAL: STEEL OVERALL
•
OUTSIDE DIAMETER: 0.422 INCHES NOMINAL IN
•
HOLE DIAMETER: 0.266 INCHES NOMINAL IN
•
MATERIAL THICKNESS: 0.062 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
STYLE DESIGNATORSPLIT HELICAL-RIGHT HAND
MATERIALSTEEL OVERALL
OUTSIDE DIAMETER0.422 INCHES NOMINAL IN
HOLE DIAMETER0.266 INCHES NOMINAL IN
MATERIAL THICKNESS0.062 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 2
N-11Interchangeable
interchangeable cross-reference
interchangeable
189557Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 189557?
189557 is a WASHER,LOCK.
What parts can replace 189557?
There are 2 known substitutes for 189557: N-11, 189557. Substitute compatibility should be verified for your specific system.
What is the NSN for 189557?
189557 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5310-00-886-5432. 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