S-91035A420 8-32 x 7/8" 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
- Superior corrosion resistance with 18-8 Stainless Steel construction, ideal for harsh industrial environments.
- Effortless manual installation and removal thanks to the knurled round thumb head design for enhanced grip.
- Reliable thread engagement with 8-32 UNC coarse threading and Class 2A fit, ensuring consistent fastening performance.
- Secure panel retention as a partially threaded captive panel screw, preventing loss in assembly and maintenance.
- Dual drive compatibility featuring a slotted drive for additional tool options alongside the thumb head.
- Compliance with stringent industry standards including ASTM A581 for material quality and RoHS 3 & REACH for environmental safety.
- Durable and long-lasting performance due to the robust material and precise manufacturing, reducing replacement frequency.
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 tool accessibility issues. The knurled round head provides a secure, non-slip grip for quick manual adjustments in tight spaces, eliminating the need for tools in many scenarios. As a captive panel screw with 8-32 UNC coarse threads, it ensures reliable fastening in electronic enclosures, machinery panels, and communication devices, where vibration resistance and easy maintenance are critical. The partially threaded design prevents the screw from falling out during disassembly, enhancing operational efficiency and safety. Made from corrosion-resistant stainless steel, it performs reliably in humid or chemically exposed environments, reducing downtime and maintenance costs for B2B clients in manufacturing, telecommunications, and automotive sectors.
Specification Summary & Compliance
This screw adheres to precise dimensional standards with a Class 2A thread fit and UNC coarse threading for consistent performance. It meets ASTM A581 specifications for material quality and is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it is free from hazardous substances and suitable for global industrial use.
