About Us – EXTSW

WHO WE ARE

EXTSW is a U.S.-based manufacturer specialising in precision-machined stainless steel washers and spacers. We only use certified US raw stainless steel that is made right here in the USA. Founded by Thomas Hoffman and supported by over 40 years of stainless steel fabrication experience, we have spent more than a decade supplying engineers, fabricators, builders, and industrial professionals with high-performance hardware built for real-world applications.

Washers and spacers are not just one of our product categories — they are our core focus. Every component we produce is made from stainless steel, CNC machined to tight tolerances, and shipped directly from our facility in Sonora, California, USA.

WHAT WE MAKE

We manufacture and supply over 2000 sizes of stainless steel washers and spacers that are in stock, both imperial and metric dimensions.

Grade 304 Stainless Steel Washers & Spacers

Our Grade 304 line is our primary workhorse range. These precision-machined components are designed for consistent dimensions, including inner diameter, outer diameter, and thickness. They provide reliable load distribution and dependable performance across a wide range of mechanical, construction, and industrial applications.

Grade 316 Stainless Steel Washers & Spacers

Our Grade 316 marine-grade stainless steel products are engineered for maximum corrosion resistance. Enhanced with molybdenum, this material is ideal for environments exposed to saltwater, chemicals, or harsh cleaning agents.

Beveled & Countersunk Washers

Available in both 304 and 316 stainless steel, our beveled and countersunk washers are designed for applications requiring angled seating surfaces. We also offer specialized options compatible with ARP bolts and nuts.

Threaded & Stepped Spacers

Our precision-turned spacers are manufactured for applications requiring exact spacing, alignment, and structural consistency. These components are available in both 304 and 316 stainless steel grades.

Custom Manufacturing

In addition to our standard catalog, we also produce custom washers and spacers. If you require specific dimensions such as inner diameter, outer diameter, or thickness not listed in our store, our team can manufacture to your specifications. Current dimension limitations are 2"/1.990" in diameter and up to 6" in length, depending on the ID and OD.

WHY EXTSW

EXTSW is not a reseller or distributor — we are a direct manufacturer. Every product is made in the USA, CNC machined, deburred, and inspected before shipping to ensure consistent quality and performance.

Our manufacturing process gives us full control over quality from raw material selection to final inspection.

We offer fast fulfilment on stocked items and support custom manufacturing requests for specialised applications. Our team is available during business hours to assist with sizing, technical questions, and order support.

CONTACT US

Business Name: EXTSW
Owner/Operator: Thomas Hoffman

Business Address:
19506 Industrial Drive, Suite F
Sonora, CA 95370
United States

Website: https://extsw.com/
Email: contact@extsw.com
Phone: +1 (209) 517-3150

Customer Support Hours:
Monday – Friday: 9:00 AM – 5:00 PM PST