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Minerallac 1/4" Split Lock Washers - Medium Split, Zinc Plated Steel, Jar Pack
Professional Fastening Solutions for Secure Connections
Minerallac 1/4" Split Lock Washers deliver reliable fastening performance with zinc plated steel construction and medium split design. These professional-grade lock washers provide hardened bearing surfaces for uniform torque control and load distribution, featuring corrosion-resistant zinc plating and precise dimensional specifications for consistent installation results.
Professional Features & Benefits
- 1/4" Size Specification: Engineered for standard 1/4" bolt applications with precise inside diameter of 0.26" for optimal fit and performance.
- Zinc Plated Finish: Corrosion-resistant zinc coating provides long-lasting protection and maintains connection integrity in various environmental conditions.
- Steel Construction: Durable steel material with Rockwell Hardness C38-43 ensures reliable spring tension and resistance to deformation under load.
- Medium Split Design: Optimized split configuration applies greater bolt tension per unit of applied torque for superior holding power.
- Hardened Bearing Surface: Creates uniform torque control and load distribution while resisting loosening caused by vibration.
- Precise Dimensions: 0.487" outside diameter and 0.062" thickness provide consistent performance and reliable installation characteristics.
Technical Specifications
- Country Of Origin: China
- Inside Diameter: 0.26
- Outside Diameter: 0.487
- Product Color: Silver
- Product Finish: Zinc Plated
- Product Material: Steel
- Product Type: Split Lock Washer
- Rockwell Hardness: C38 - 43
- Thickness: 0.062
Professional Applications
- Electrical Panel Assembly and Maintenance
- Industrial Equipment Installation
- Commercial Building Construction
- Mechanical System Assembly
- Infrastructure and Utility Projects
- Professional Electrical Contracting
Why Choose Minerallac Quality?
Minerallac split lock washers combine precision manufacturing with zinc plated corrosion protection and hardened steel construction. The medium split design and controlled hardness specifications ensure consistent performance and reliable vibration resistance for professional fastening applications requiring secure, long-lasting connections.
Manufacturer Resources
Product Specs
- Inside Diameter:
- 0.26
- Outside Diameter:
- 0.487
- Product Color:
- Silver
- Product Finish:
- Zinc Plated
- Product Material:
- Steel
- Product Type:
- Washer
- Rockwell Hardness:
- C38 - 43
- Thickness:
- 0.062
- Department:
- Electrical
- Product Subgroup:
- Electrical Fasteners
- Product Group:
- Hangers, Supports & Fasteners
Minerallac 40525J – Frequently Asked Questions
1) Will a Minerallac 40525J lock washer fit a 1/4-20 bolt or screw?
Yes. The 40525J is sized for 1/4 inch fasteners, with a 0.26 inch inside diameter so it slips over the shank of a standard 1/4-20 bolt or machine screw without binding. Outside diameter is 0.487 inch, so it sits well inside the footprint of a typical 1/4 inch hex nut or bolt head and bears on the hardened split rather than overhanging the joint.
2) Is a split lock washer or a flat washer the right choice for strut and panel hardware that vibrates loose?
A flat washer only spreads load; it does nothing to stop a nut backing off. The Minerallac medium split lock washer is the one that fights vibration: the hardened 0.062 inch thick split section acts as a spring under the nut, holding tension and resisting loosening from vibration. If you need load spreading over a slotted channel or sheet metal as well, run a flat washer against the material and the split lock washer against the nut.
3) Are these Minerallac lock washers hard enough not to flatten out when torqued down?
They're hardened to Rockwell C38-43, which is the spring-hardness range for split lock washers, so the washer stores tension instead of crushing flat when you pull the nut down. The bearing faces are hardened too, which keeps torque readings consistent across a run of connections.
4) Can zinc plated steel lock washers be used outdoors or in a damp mechanical room?
The 40525J is zinc plated steel, which gives corrosion protection for general indoor, mechanical room, and sheltered work. Zinc plating is a sacrificial coating, so for direct weather exposure, wash-down, or coastal installations most specs call for hot-dip galvanized or stainless hardware instead. Inside a panel, enclosure, or on interior strut runs the zinc plating is the normal choice.
5) How many 1/4 inch lock washers come in the Minerallac 40525J jar?
The 40525J ships as a 100 piece jar. The jar pack is the practical format for a service van or a panel shop bench: you pull what you need for a run of 1/4 inch strut and panel connections without loose washers scattering in a bin.
6) What part number should I order for 1/4 inch Minerallac split lock washers, and where are they made?
The part number is Minerallac 40525J, a 1/4 inch medium split lock washer in zinc plated steel. Country of origin is China. That MPN is what to reference on a submittal or a reorder so you get the medium split version rather than a heavy or extra-duty split.
How fast can I get the Minerallac 40525J delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the
continental
U.S.
Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit,
reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the Minerallac 40525J come with a warranty?
Absolutely. The Minerallac 40525J is backed by a manufacturer’s warranty.
For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the Minerallac 40525J?
You can call, text, or email our expert support team for fast answers. We’re here to help with
product
selection,
installation tips, and troubleshooting. Contact Us
Why buy the Minerallac 40525J from ZenSupply?
ZenSupply makes it easy to get the commercial door hardware you need—fast shipping, expert support,
and
rewards on
every order.
Our team is always ready to help you choose the right product for your project.