S-92908A288 0.344" ID x 1.25" OD Finishing Washers
Finishing Washers
Image may differ from product. See technical specification for details.
Basic Information
Dimension Parameters
Material & Strength Parameters
Installation & Application Parameters
Finish & Compliance Parameters
Geometric Parameters
- Fast delivery
- Enjoy discounts on bulk purchases
- Secure Payment
- Fast Global Shipping
Key Features & Benefits at a Glance
- Superior corrosion resistance from the black-oxide steel finish, extending service life in harsh industrial environments.
- Precise 82° countersink angle ensures flush mounting with matching screw heads, reducing snagging and improving safety.
- Optimized dimensions (1.25" OD, 0.344" ID) provide a secure fit for 5/16" screws, distributing load evenly to prevent loosening.
- High Rockwell 15N80 hardness offers excellent wear resistance, maintaining integrity under heavy-duty fastening stresses.
- Compliance with RoHS 3 and REACH standards guarantees safe, environmentally responsible use in global supply chains.
- Durable 0.198-0.218" thickness enhances structural support, minimizing deformation in high-pressure applications.
- Inch-system compatibility simplifies sourcing and replacement in North American machinery and equipment.
Professional Applications & Engineering Value
Engineered for demanding industrial settings, these 82° countersunk washers in black-oxide steel address critical fastening challenges like vibration-induced failure and corrosion. The precise countersunk design allows screws to sit flush, eliminating protrusions that could damage equipment or pose safety risks in assembly lines, automotive frames, or structural frameworks. With a Rockwell 15N80 hardness, they withstand repetitive stress without compromising the 5/16" screw fit, ensuring reliable performance in heavy machinery, construction, and manufacturing. The corrosion-resistant surface further enhances durability in humid or chemically exposed environments, reducing maintenance costs and downtime.
Specification Summary & Compliance
This washer features an OD of 1.25", ID of 0.344", and thickness of 0.198-0.218", designed for 5/16" screws with an 82° countersink angle per common inch-system standards. It complies with RoHS 3 (2015/863/EU) under exemption 6(a) for lead in steel and REACH (EC 1907/2006) for hazardous substances, ensuring adherence to international environmental and safety regulations.
