S-91108A110 0.115" ID x 0.27" OD ASME B18.21.1 Internal-Tooth Lock Washers
Internal-Tooth Lock Washers
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Basic Information
Dimension Parameters
Material & Strength Parameters
Installation & Application Parameters
Finish & Compliance Parameters
Special Type Parameters
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Key Features & Benefits at a Glance
- Superior vibration resistance with internal teeth that bite into mating surfaces, preventing loosening under dynamic loads.
- Excellent corrosion resistance from 316 stainless steel, ideal for harsh environments including marine and chemical applications.
- Precision fit for No. 4 screws with a 0.115" ID and 0.27" OD, ensuring secure and accurate installation.
- Compliance with ASME B18.21.1 standard guarantees consistent quality, dimensional accuracy, and reliable performance.
- RoHS 3 and REACH compliant for safe use in regulated industries, free from hazardous substances.
- Durable construction with a thickness of 0.012-0.018", providing long-lasting service without deformation.
- Internal tooth location design offers concentrated locking force, enhancing fastener security in compact assemblies.
Professional Applications & Engineering Value
This 316 stainless steel internal tooth lock washer is engineered to solve critical issues in industrial fastening, such as joint failure due to vibration and corrosion. The internal teeth create a firm grip on the screw and surface, effectively resisting loosening in high-stress environments like machinery, automotive, and electrical enclosures. Made from 316 stainless steel, it delivers exceptional resistance to pitting and crevice corrosion, making it suitable for offshore, chemical processing, and food industry applications. Compliant with ASME B18.21.1, it ensures dimensional precision for reliable performance in assemblies requiring No. 4 screw sizes, reducing maintenance needs and downtime.
Specification Summary & Compliance
This washer meets ASME B18.21.1 specifications for dimensional accuracy, including an ID of 0.115", OD of 0.27", and thickness range of 0.012-0.018". It conforms to RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) standards, ensuring environmental and safety compliance. The internal tooth design and inch system measurements provide reliable fastening for industrial use.
