S-98038A285 1.188" ID x 2.25" OD ASTM F436 Type 1 Structural Washers

Key Features & Benefits at a Glance

• Exceptional load distribution with 2.25" OD and 1.188" ID for superior surface coverage and reduced stress on materials
• Enhanced durability and wear resistance from hardened steel construction with Rockwell C38 hardness rating
• Reliable performance in demanding applications through strict compliance with ASTM F436 Type 1 specifications
• Perfect fit for 1 1/8" screw applications with precise dimensional accuracy for secure fastening
• Long-term environmental compliance meeting RoHS 3 and REACH regulations for safe industrial use
• Consistent thickness control (0.136-0.177") ensuring uniform pressure distribution and joint stability
• Corrosion-resistant steel construction providing extended service life in harsh operating conditions

Professional Applications & Engineering Value

These ASTM F436 Type 1 flat washers deliver critical engineering value in heavy-duty applications where vibration resistance and load distribution are paramount. The hardened steel construction with Rockwell C38 hardness ensures exceptional performance in structural steel connections, machinery assembly, and industrial equipment where standard washers would deform under pressure. The precise 1.188" ID and 2.25" OD dimensions provide optimal bearing surface for 1 1/8" screw applications, preventing bolt head embedment and distributing clamp load effectively across joined materials. These industrial washers solve common fastener failure points by maintaining dimensional stability under extreme static and dynamic loads, making them ideal for construction, manufacturing, and heavy equipment maintenance applications.

Specification Summary & Compliance

Manufactured to exact ASTM F436 Type 1 specifications with precise dimensional tolerances for inch system applications. The washers feature a thickness range of 0.136-0.177" and are fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations. The hardened steel material meets rigorous industry standards for mechanical properties and performance in structural bolting applications.