6 Lock Washer Manufacturers in 2025

Table of Contents

• What Is a Lock Washer?
• List of 6 Lock Washer Manufacturers
• List of 226 Lock Washer Products
• Global Distribution of Lock Washer Manufacturers by Country

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    • ITW Shakeproof Industrial Manufacturer
      LOCK WASHERS

    • • Website
      • United States, Wisconsin
      • Company Profile

    • Address: W6331 Bee Road Watertown, Wisconsin, United States of America

    Manufacturer Overview

    ITW Shakeproof Industrial is a manufacturer of fastening equipment originally founded in 1923 as the Illinois Lock Washer Company before its acquisition by Illinois Tool Works (ITW) in 2010. Based in Watertown, Wisconsin, the company offers various fastening solutions including threaded screws, machine screws, pins, and lock washers. These are primarily used by client manufacturers of consumer appliances, trailers, heavy trucks, and rail equipment. ITW Shakeproof also provides design assistance, testing, and in-house prototyping customers with unique stability concerns services for customer projects.

• • 

    • L.H. Dottie. Manufacturer Distributor
      Lock Washers

    • • Website
      • United States, California
      • Company Profile

    • Address: 6131 Garfield Ave, Commerce, California, United States of America

    Company Overview

    L.H. Dottie, established in 1965 with headquarters in Commerce, California, is a manufacturer, distributor, and supplier of industrial fasteners and hardware. Their extensive product range includes screws, anchors, fastener kits, hangers, electrical fittings, pipe supports, staples, adhesives, and tools. Holding an ISO 9001:2015 certification, and is UL listed, the company caters to diverse industries such as electrical, security, energy sector, and plumbing/HVAC industries, providing products that play a crucial role in securing and fastening various materials like wood, metal, and concrete.

• • 

    • Wrought Washer Manufacturing, Inc. Manufacturer Distributor
      Split Lock Washers

    • • Website
      • United States, Wisconsin
      • Company Profile

    • Address: 2100 South Bay Street, Milwaukee, Wisconsin, United States of America

    Company Overview

    Wrought Washer, established in 1905 and headquartered in Milwaukee, Wisconsin, USA, is a manufacturer and supplier of standard and special washers. The company’s product range includes standard washers such as flat washers, spring washers, lock washers, and split washers, as well as special washers tailored to meet unique customer specifications. These products cater to diverse industries, including automotive, construction, electrical, agriculture, and material handling. Its services include manufacturing, testing and certification, supply chain management, and technical support. Devoted to delivering quality washers and services, the company holds ISO 9001:2015 certification.

• • 

    • KD Fasteners, Inc. Manufacturer Distributor
      LOCK WASHERS

    • • Website
      • Founded: 1987
      • United States, Illinois
      • Company Profile

    • Address: 1440 Jeffrey DrAddison, Illinois, United States of America

    Company Overview

    KD Fasteners, Inc. was founded in 1987 and headquartered in Addison, Illinois. The company is a fastener manufacturer and distributor, specializing in custom fasteners from such materials as steel, brass, silicon bronze, and other non-ferrous metals, supplying over 100,000 different fastener components. The company has 3 product segments: standard fasteners, standard metric fasteners, and custom fasteners. Custom fastener varieties include studs, washers, machine screws, flange bolts, and many other varieties. The company also offers many plating varieties including zinc, black oxide, waxing, and Magni 565 and 560.

• • 

    • Ti Kato Manufacturer
      Tightnik

    • • Website
      • Company Profile

    Manufacturer Overview

    Ti Kato is based in Chiyoda-ku, Tokyo, Japan, and is a manufacturer and distributor of construction parts and components that was originally established as Kato Hardware Store in 1950. The company’s product lineup includes its Tightnik-branded specialized washers designed to resist degradation or loosening from earthquakes, its Relevel-branded custom adjustment plate designed for ventilation and ease-of-use, and its Gripper-branded secured fixture for anchor bolts designed for one-touch installation. The company’s products are commonly used in the construction, home maintenance, and DIY markets.

• • 

    • Seastrom Manufacturing Co., Inc. Manufacturer Manufacturer
      Lock Washers

    • • Website
      • Founded: 1928
      • Company Profile

    Company Overview

    Seastrom Manufacturing Co., Inc. is an ISO 9001-certified manufacturer of precision washers and related hardware that was established in 1928 in Glendale, California, USA. The company offers standard washer models such as lock and flat round washers, military spec washers such as AN and MS series washers, and specialty assembly hardware products such as Hiram Jones pins and expansion plugs. It also offers custom engineering and laser part marking services for unique projects. The company’s products and services are commonly used in the aerospace, defense, and heavy machinery industries.

Derivation Method