S-91358A503 0.785" ID x 1.478" OD ASME B18.2.6; ASTM F959 Type A490 Tension-Indicating Structural Washers
Tension-Indicating Structural Washers
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Basic Information
Dimension Parameters
Material & Strength Parameters
Installation & Application Parameters
Finish & Compliance Parameters
Special Type Parameters
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Key Features & Benefits at a Glance
- Instant visual tension confirmation with bright orange dye that eliminates guesswork and ensures proper bolt preload
- Exceptional 35,000 lbs load capacity maintains structural integrity under extreme mechanical stress in heavy-duty applications
- Premium steel construction with Rockwell C37 hardness provides superior wear resistance and long-term reliability
- Precision-engineered 0.785" ID and 1.478" OD dimensions ensure perfect fit for 3/4" screw applications without slippage
- Dual compliance with ASME B18.2.6 and ASTM F959 Type A490 standards guarantees consistent performance in critical structural connections
- Full regulatory compliance with RoHS 3 and REACH standards for safe use in global industrial markets
- Variable thickness design (0.142-0.240") accommodates different joint configurations while maintaining tension accuracy
Professional Applications & Engineering Value
These tension indicating washers solve critical bolt tension verification challenges in structural steel, heavy machinery, and construction applications. The orange tension-indicating dye provides immediate visual confirmation when proper preload is achieved, preventing both under-tightening (which causes joint failure) and over-tightening (which damages threads). Manufactured from high-strength steel with Rockwell C37 hardness, these washers maintain dimensional stability under the rated 35,000 lbs load capacity, making them ideal for structural connections, bridge construction, and industrial equipment assembly where bolt tension accuracy is non-negotiable.
Specification Summary & Compliance
This tension indicating washer features precise dimensional specifications: 0.785" ID, 1.478" OD, and thickness range of 0.142-0.240" for 3/4" screw compatibility. Manufactured to exacting ASME B18.2.6 dimensional standards and ASTM F959 Type A490 performance requirements. Full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations ensures environmental safety and global market acceptance.
