S-95536A318 M4 x 13 mm 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 manual operation with knurled round head for secure, tool-free tightening and loosening in tight spaces
- Superior corrosion resistance provided by 18-8 stainless steel material, ensuring longevity in harsh industrial environments
- Quick and easy installation thanks to coarse M4 x 0.7mm threading and partial threading design for faster assembly
- Secure panel fastening with 5.5mm thread length and captive design to prevent loosening in vibration-prone applications
- Versatile drive options featuring both thumb grip and slotted drive for flexibility in installation methods
- Reliable performance backed by ASTM A581 specification compliance for consistent quality and dimensional accuracy
- Environmental compliance meeting RoHS 3 and REACH standards for safe use in regulated industries
Professional Applications & Engineering Value
This M4 thumb screw delivers exceptional value in panel fastening applications where frequent access and reliability are critical. The 18-8 stainless steel construction provides excellent corrosion resistance, making it ideal for electronic enclosures, industrial control panels, and medical equipment that require repeated maintenance. The knurled head texture ensures positive grip even with gloved hands, while the coarse metric threading enables rapid installation and removal. The partially threaded design and captive panel screw configuration prevent loss during service, reducing downtime in assembly lines and field maintenance operations. This combination of features solves common challenges in industrial thumb screw applications where durability, ease of use, and regulatory compliance are paramount.
Specification Summary & Compliance
This metric thumb screw features precise M4 x 0.7mm coarse threading with standard right-hand thread direction and partial threading configuration. The fastener maintains dimensional accuracy with 8mm head diameter, 13mm overall length, and 5.5mm thread length. Manufacturing complies with ASTM A581 specification for quality assurance, while meeting RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental standards for restricted substance compliance in industrial applications.
