S-91228A113 0.438" ID Leveling Washers for I-Beams

Key Features & Benefits at a Glance

• Superior load distribution with tapered design that prevents loosening and maintains joint integrity under heavy vibration
• Exceptional corrosion resistance thanks to black-oxide iron finish that protects against rust in harsh industrial environments
• High durability performance with Rockwell B62 hardness rating ensuring long service life under repeated stress
• Precise dimensional compatibility with 0.438" ID and 1.25" width engineered for perfect fit with 3/8" screws
• Reliable industrial compliance meeting both RoHS 3 and REACH standards for safe use in regulated applications
• Optimized thickness gradient from 0.344" to 0.156" providing controlled compression and surface leveling
• Heavy-duty construction in inch measurement system for seamless integration with existing industrial equipment

Professional Applications & Engineering Value

This heavy-duty tapered washer addresses critical engineering challenges in industrial assembly where vibration-induced loosening and surface unevenness compromise joint integrity. The black-oxide iron construction provides essential corrosion protection for outdoor equipment, machinery, and structural applications exposed to moisture and chemicals. With its precisely engineered tapered profile transitioning from 0.344" to 0.156" thickness, the washer creates progressive compression that maintains bolt tension while compensating for surface irregularities. The Rockwell B62 hardness ensures the washer maintains its structural integrity under repeated loading cycles, making it ideal for heavy machinery, construction equipment, and automotive applications where reliability is paramount. The combination of corrosion resistance and superior load distribution makes this tapered washer particularly valuable for maintaining joint security in vibrating systems.

Specification Summary & Compliance

This tapered washer features precise inch system dimensions including 0.438" internal diameter, 1.25" width, and tapered thickness from 0.344" to 0.156" specifically engineered for 3/8" screw applications. Manufactured from black-oxide iron with Rockwell B62 hardness for consistent performance. The product maintains full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and regulatory acceptance for industrial use across global markets.