S-94744A594 1.188" ID x 2.75" OD ASME B18.21.1 ASME Washers

Key Features & Benefits at a Glance

• Enhanced Corrosion Resistance: Zinc-plated steel construction provides reliable protection against rust and environmental degradation, extending service life in demanding industrial settings.
• Precision Fit for 1 1/8" Screws: The 1.188" ID ensures a secure and accurate fit, preventing loosening and maintaining assembly integrity under vibration and load.
• Optimal Load Distribution: Large 2.75" OD design effectively spreads clamping force, protecting surfaces and reducing the risk of material damage or fastener failure.
• Rigorous Quality Assurance: Manufactured to meet ASME B18.21.1 specifications, guaranteeing consistent dimensional accuracy, thread compatibility, and performance reliability.
• Environmental & Regulatory Compliance: Conforms to RoHS 3 and REACH standards, ensuring safe use in regulated industries and global market accessibility.
• Durable Material Strength: Made from robust steel, this flat washer offers excellent mechanical strength for heavy-duty applications and high-stress environments.
• Versatile Industrial Application: Suitable for a wide range of machinery, construction, and equipment assembly needs where reliable, corrosion-resistant fastening is critical.

Professional Applications & Engineering Value

This zinc-plated steel flat washer is engineered to address common industrial challenges such as surface damage, fastener corrosion, and assembly failure. The zinc plating provides a sacrificial layer that significantly enhances corrosion resistance, making it ideal for outdoor equipment, marine applications, and high-humidity environments. Its precise 1.188" ID and 2.75" OD dimensions ensure perfect compatibility with 1 1/8" screws, providing a larger bearing surface to distribute load effectively and prevent embedding into soft materials. This design is critical for maintaining joint integrity in heavy-duty washers used in construction machinery, structural steelwork, and automotive assemblies, where vibration and dynamic loads are prevalent. By complying with ASME B18.21.1, it delivers consistent performance, reducing maintenance needs and downtime in professional engineering projects.

Specification Summary & Compliance

This flat washer features an Inside Diameter (ID) of 1.188", Outside Diameter (OD) of 2.75", and Thickness ranging from 0.146" to 0.174", designed for use with 1 1/8" screw sizes. It conforms to the ASME B18.21.1 standard, ensuring precise dimensional tolerances and mechanical properties for reliable fastening. The product is RoHS 3 (2015/863/EU) compliant under exemption 6(a) for lead in steel alloys and is REACH (EC 1907/2006) compliant as of January 17, 2023, meeting environmental and safety regulations for industrial use.