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Description
S04021-13 – SCAG 5/8-11 Elastic Stop Lock Nut, Zinc-Plated (Genuine OEM Part)
The SCAG S04021-13 Elastic Stop Lock Nut is a genuine OEM 5/8"-11 zinc-plated nylon insert lock nut designed to provide secure, vibration-resistant fastening for heavy-duty assemblies on SCAG commercial and residential lawn mowers. Featuring a durable elastic (nylon) locking insert, this lock nut helps prevent loosening caused by engine vibration, blade rotation, and continuous operation in demanding mowing environments.
Manufactured from high-strength steel and finished with a corrosion-resistant zinc coating, the S04021-13 delivers dependable clamping force, long service life, and OEM-quality performance for critical mower components.
Product Details
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Manufacturer Part Number: S04021-13
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Brand: SCAG
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Part Type: Elastic Stop Lock Nut
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Thread Size: 5/8"-11 UNC
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Style: Nylon Insert Lock Nut
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Material: High-Strength Steel
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Finish: Zinc-Plated
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Corrosion Resistance: Yes
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OEM Status: Genuine SCAG OEM Part
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Installation: Direct OEM replacement
Key Features
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Genuine SCAG OEM replacement hardware
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Precision 5/8"-11 UNC threads
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Integrated nylon insert prevents loosening
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Zinc-plated finish resists corrosion
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Heavy-duty steel construction
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Excellent resistance to vibration and shock loads
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Ideal for commercial mower applications
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Direct-fit OEM replacement
Function
The SCAG S04021-13 Elastic Stop Lock Nut securely fastens threaded components while the nylon insert maintains continuous locking pressure. This helps prevent fasteners from backing off during operation, ensuring safe, reliable performance and extending the service life of mower assemblies.
Compatible SCAG Equipment
The SCAG S04021-13 Lock Nut is used on a variety of SCAG commercial and residential mower platforms, including:
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SCAG Turf Tiger
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SCAG Turf Tiger II
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SCAG Cheetah
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SCAG Cheetah II
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SCAG Tiger Cat
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SCAG Tiger Cat II
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SCAG Patriot
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SCAG Freedom Z
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SCAG Liberty Z
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SCAG V-Ride
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SCAG V-Ride II
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SCAG V-Ride XL
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SCAG Wildcat
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SCAG SWZ Series
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SCAG Walk-Behind Mowers
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Additional SCAG equipment utilizing 5/8"-11 elastic stop lock nuts
Always verify compatibility using your equipment model and serial number before ordering.
Who Is This For?
Ideal for:
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Commercial landscaping contractors
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Professional lawn care companies
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Equipment repair technicians
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Municipal maintenance departments
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Golf course maintenance crews
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Homeowners servicing SCAG equipment
Recommended Property Size
Suitable for:
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Residential lawns
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Large residential properties
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Commercial landscapes
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Parks
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Athletic fields
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Golf courses
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Municipal grounds
Pros
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Genuine SCAG OEM quality
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Heavy-duty steel construction
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Zinc-plated for corrosion protection
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Nylon insert resists vibration loosening
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Precision OEM thread fit
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Direct replacement installation
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Long-lasting durability
Cons
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Designed specifically for compatible 5/8"-11 threaded applications
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Nylon insert lock nuts should be replaced if the locking feature becomes worn after repeated removal
Comparison – Genuine SCAG OEM vs Aftermarket Lock Nuts
SCAG S04021-13 Genuine OEM
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Exact OEM thread tolerances
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Premium nylon locking insert
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Durable zinc-plated finish
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Superior vibration resistance
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Guaranteed fit and long service life
Aftermarket Alternatives
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Thread tolerances may vary
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Lower-quality locking inserts
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Reduced corrosion protection
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Less consistent durability under heavy-duty use
Why Buy from Barry's Power Equipment?
Barry's Power Equipment is an authorized SCAG dealer supplying genuine OEM replacement parts for commercial and residential mowing equipment.
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Genuine SCAG OEM parts
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Authorized SCAG dealer
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Fast nationwide shipping
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Competitive pricing
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Expert technical support
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Extensive inventory of genuine SCAG replacement parts
Choose the SCAG S04021-13 Genuine OEM 5/8"-11 Elastic Stop Lock Nut to ensure secure fastening, dependable vibration resistance, and long-lasting reliability for your SCAG mower.

