S-91035A615 1/4"-20 x 3/4" 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 grip and tool-free operation with knurled round head design for easy hand tightening/loosening in confined spaces
- Exceptional corrosion resistance from 18-8 stainless steel construction, ideal for harsh industrial environments
- Reliable coarse threading engagement with UNC 1/4"-20 threads and Class 2A fit for secure panel fastening
- Optimized partial threading design prevents cross-threading while maintaining precise panel alignment
- Dual drive compatibility featuring both thumb-operated knurling and slotted drive for flexible installation
- Regulatory compliance assurance meeting ASTM A581, RoHS 3, and REACH standards for global applications
- Consistent dimensional accuracy with 1/2" head diameter and 3/4" length for uniform panel mounting
Professional Applications & Engineering Value
This 18-8 stainless steel thumb screw delivers exceptional value in panel fastening applications where frequent access and corrosion resistance are critical. The knurled head texture provides positive grip even with gloved hands, while the right-hand UNC coarse threading ensures quick engagement and disengagement in captive panel screw assemblies. Engineered with partial threading, it prevents over-insertion and maintains proper panel alignment in electronic enclosures, industrial control systems, and machinery access panels. The slotted drive compatibility offers installation flexibility, making it ideal for maintenance-intensive environments where both manual and tool-assisted tightening may be required.
Specification Summary & Compliance
Manufactured to precise dimensional standards with Class 2A thread fit and 1/4"-20 UNC coarse thread specifications. Complies with ASTM A581 material standards for quality assurance, along with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations. Features include 1/2" head diameter, 3/4" overall length, and 5/16" thread length with right-hand threading direction for standardized industrial applications.
