S-99041A216 0.343" ID Square Washers

Key Features & Benefits at a Glance

• Enhanced corrosion resistance through zinc plating, extending service life in humid or outdoor environments
• Superior load distribution with 0.75" square design, preventing surface damage and fastener loosening under heavy loads
• Consistent dimensional accuracy with 0.343" ID ensuring perfect fit for 5/16" screws in inch-system applications
• Reliable mechanical strength backed by Rockwell B40 hardness, maintaining shape under sustained pressure
• Environmental compliance assurance meeting RoHS 3 and REACH standards for safe industrial usage
• Optimized thickness range (0.042-0.051") providing ideal balance between spacing and compression requirements
• Broad industrial compatibility with standard inch fasteners for machinery, construction, and equipment assembly

Professional Applications & Engineering Value

Engineered for demanding industrial environments, these zinc-plated steel square washers solve critical challenges in machinery assembly and structural applications. The 0.75" width creates an expanded bearing surface that effectively distributes clamping forces, preventing joint fatigue and material deformation in heavy equipment. The Rockwell B40 hardness ensures the washer maintains its structural integrity under vibration and dynamic loads, while the zinc plating provides essential corrosion protection in manufacturing facilities, outdoor installations, and marine-adjacent applications. These 5/16" washers are particularly valuable in construction frameworks, agricultural machinery, and industrial equipment where reliable load distribution and environmental durability are paramount for long-term operational safety.

Specification Summary & Compliance

Manufactured to precise inch system standards with 0.343" inner diameter for perfect compatibility with 5/16" fasteners. The thickness tolerance (0.042-0.051") ensures consistent performance across production batches. Full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, meeting the latest substance restriction requirements as of June 2023. Material certification and manufacturing processes adhere to industrial quality standards for mechanical washers in heavy-duty applications.