
FW14-100P
Flat Washer, Steel -1/4" or 3/8"
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Our Flat Washers are essential components designed to increase the surface area of fasteners, ensuring even distribution of force when tightened to a surface. Manufactured from high-quality steel and finished with zinc plating, these washers not only enhance fastener performance but also prevent loosening due to vibrations, provide a barrier to stop bolts or screws from pulling through, and can act as spacers.
Key Features:
- Type: Flat Washer
- Available Sizes: Offered in three convenient packs - 1/4'' (100 Pack), 3/8" (100 Pack), and 1/2" (50 Pack), to suit various project needs.
- Material: Made from unhardened carbon steel, providing strength without compromising flexibility.
- Finish: Zinc plated to resist corrosion and ensure longevity under various environmental conditions.
- Standards Compliance: Manufactured according to the ASME B18.21.1 standard, ensuring reliability and consistency in performance.
- ROHS Compliant: Meets standards for restriction of hazardous substances, making them suitable for use in sensitive applications and environments.
Ideal for use in a broad range of construction, manufacturing, and engineering applications, our Flat Washers are crucial for securing connections and ensuring stability in assemblies. Their robust construction and protective finish make them a reliable choice for professionals looking for quality and durability in their fastening solutions.

Flat Washer, Steel -1/4" or 3/8"
If you have any questions, you are always welcome to contact us. We'll get back to you as soon as possible, within 24 hours on weekdays.
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Shipping Information
Orders placed before 12:00 PM (PST) ship the same day or within 2 business days, with tracking provided within 72 hours. Learn more in our Shipping Policy.
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Returns & Exchanges
Non-defective items may be returned within 30 days with a 30% restocking fee. Shipping costs are non-refundable, and return shipping is the customer’s responsibility. See our full Return Policy.
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Cancellations
Orders can be canceled before shipment; if already shipped, standard return fees apply. Learn more about Cancellations.
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Damaged Shipments & Shortages
Report any shortages, damages, or incorrect items within 5 business days of delivery. For assistance, visit our Claims Policy.
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Order was processed and shipped quickly. Order arrived in sturdy box with plenty of cushion to insure against damage. Questions were answered as soon as possible. Look forward to working with Sonic again on future orders
— Peter Hoffman
I placed an order with Sonic Electric and after receiving needed to return the items. I was so pleased to get prompt personalized attention and a full refund. So nice to do business with a customer oriented company.
— Cindy Ward
I recently ordered two pop-up outlets for a kitchen island. One of them won't stay closed. I emailed customer service, and after a couple of email exchanges and a photo, they are shipping a replacement. Things like this can be an absolute hassle, but they were great. I would not hesitate to order from them again.
— Kathleen Snell
Great price, excellent service.
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Great products, prices and service.
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Items arrived quick. Just what I needed!
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Accurate and fast
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Great products, great pricing, delivered exactly as promised, on time. Would definitely buy from again.
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Handled all of my lighting for my store. Beautiful work. Highly recommend!
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