S-91035A650 1/4"-20 x 1 1/2" 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 for reliable performance in harsh industrial environments
- Enhanced manual operation through knurled round head design providing excellent grip without tools
- Quick installation and removal with 1/4"-20 UNC coarse threading that resists cross-threading
- Secure panel mounting through partially threaded design with precise Class 2A thread fit
- Versatile drive compatibility featuring both thumb operation and slotted drive options
- Regulatory compliance assurance meeting ASTM A581, RoHS 3, and REACH standards for global applications
- Optimized length configuration with 1 1/2" total length and 5/16" thread length for various panel thicknesses
Professional Applications & Engineering Value
This 18-8 stainless steel thumb screw delivers exceptional value in industrial panel mounting applications where frequent access is required. The knurled round head provides superior grip for manual operation, eliminating the need for tools during maintenance cycles. Engineered with 1/4"-20 UNC coarse threading, these captive panel screws offer rapid installation while minimizing cross-threading risks. The partially threaded design ensures secure fastening across various panel thicknesses, making them ideal for electronic enclosures, control panels, and machinery access points. The corrosion-resistant properties of 18-8 stainless steel guarantee long-term reliability in demanding environments, from manufacturing facilities to outdoor installations.
Specification Summary & Compliance
This thumb screw features precision Class 2A thread fit with 1/4"-20 UNC coarse threading and right-hand thread direction. The product meets ASTM A581 specifications for quality assurance and demonstrates full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations. Manufacturing standards ensure dimensional accuracy with 1/2" head diameter, 0.563" head height, and 1 1/2" total length with 5/16" thread length for consistent performance across industrial applications.
