S-99041A152 0.312" ID Square Washers

Key Features & Benefits at a Glance

• Enhanced Load Distribution – The 2" square shape provides a larger surface area than round washers, effectively spreading pressure and preventing surface damage in demanding applications.
• Superior Corrosion Resistance – Constructed from zinc-plated steel, this washer offers reliable protection against rust and environmental degradation, extending the service life of your assembly.
• Precision Fit for 1/4" Screws – The 0.312" inner diameter ensures a secure and accurate fit on standard 1/4" fasteners, reducing the risk of misalignment and improving joint integrity.
• Exceptional Mechanical Strength – With a Rockwell B40 hardness rating, this component maintains its form under high stress, resisting deformation and ensuring long-term fastener performance.
• Guaranteed Material Consistency – A controlled thickness range of 0.225" to 0.265" ensures uniform compression and reliable performance in every installation.
• Compliance with Global Standards – Meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring the washer is free from hazardous substances and safe for use in regulated industries.
• Ideal for Heavy-Duty Applications – The robust inch system design and material strength make it suitable for construction, machinery, and other high-stress industrial environments.

Professional Applications & Engineering Value

This heavy-duty square washer is engineered to address common challenges in industrial assembly, such as joint loosening and material fatigue. The zinc-plated steel construction provides a durable barrier against corrosion, which is critical for outdoor equipment or machinery exposed to harsh conditions. Its precise 0.312" ID and 2" width ensure optimal load distribution, reducing stress concentrations on connected surfaces and preventing bolt pull-through. This is particularly valuable in structural frameworks, automotive assemblies, and heavy machinery where vibration and dynamic loads are prevalent. By utilizing a square washer with controlled thickness and high Rockwell B40 hardness, engineers can achieve more reliable, maintenance-free connections that uphold safety and performance standards over time.

Specification Summary & Compliance

This square washer conforms to standard inch system dimensions, with an inner diameter of 0.312" and a width of 2", designed for use with 1/4" screws. The material thickness is maintained within a precision range of 0.225" to 0.265" to ensure consistent performance. It is manufactured from zinc-plated steel and meets Rockwell B40 hardness specifications for mechanical durability. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its adherence to environmental and safety standards for hazardous substance restrictions.