S-91035A710 1/4"-28 x 5/8" ASTM A581, ASTM A582 Captive Panel Screws
Captive Panel Screws
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Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
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Key Features & Benefits at a Glance
- Enhanced corrosion resistance with 18-8 stainless steel construction, ensuring long-term reliability in harsh industrial environments.
- Superior manual grip and torque application thanks to the knurled round head design, allowing for easy installation and removal without tools.
- Precise and secure fastening with a 1/4"-28 UNF fine thread and Class 2A fit, providing excellent thread engagement and vibration resistance.
- Versatile partial threading for controlled panel retention, ideal for captive panel applications where repeated access is needed.
- Compliance with stringent industry standards including ASTM A581, RoHS 3, and REACH, ensuring material quality and environmental safety.
- Durable and maintenance-free performance due to the right-hand thread and slotted drive, supporting consistent operation in demanding settings.
Professional Applications & Engineering Value
This 18-8 stainless steel thumb screw is engineered to address common challenges in industrial assembly, such as corrosion-induced failure and inefficient manual handling. The knurled round head offers exceptional grip, reducing slippage and speeding up maintenance in captive panel screw setups, while the UNF fine thread ensures tight, reliable fastening in vibration-prone equipment. Made from corrosion-resistant material and meeting ASTM A581 specifications, it delivers long-lasting performance in electronics enclosures, machinery panels, and other applications where durability and compliance are critical. Its partially threaded design allows for secure panel retention without over-tightening, making it a cost-effective solution for repetitive access needs.
Specification Summary & Compliance
This thumb screw features a 1/4"-28 UNF fine thread with Class 2A thread fit for precise dimensional accuracy, and it is manufactured in compliance with ASTM A581 standards. The product is RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, ensuring adherence to environmental and safety regulations for industrial use.
