S-91035A540 10-32 x 7/8" ASTM A581, ASTM A582 Captive Panel Screws

Key Features & Benefits at a Glance

• Enhanced manual grip and tool-free operation with a knurled round head and slotted drive for quick installation and removal in tight spaces
• Superior corrosion resistance and durability due to 18-8 stainless steel construction, ideal for harsh industrial environments
• Secure and precise panel fastening with a partially threaded shank that prevents over-tightening and ensures reliable captive panel retention
• Consistent thread engagement and interchangeability from the 10-32 UNF fine thread with Class 2A fit, reducing cross-threading risks
• Broad compatibility with standard UNF components and a 3/8" head diameter for stable torque application and panel alignment
• Compliance with rigorous industry and environmental standards including ASTM A581, RoHS 3, and REACH for safe, sustainable use
• Right-hand thread design with fine spacing for smooth, vibration-resistant fastening in precision assemblies

Professional Applications & Engineering Value

This 10-32 UNF thumb screw in 18-8 stainless steel addresses common challenges in industrial panel fastening, such as frequent access needs and exposure to corrosive conditions. The knurled head provides a non-slip surface for hand tightening, eliminating the need for tools in maintenance-heavy environments like captive panel systems in electronics, machinery, and enclosures. Its partially threaded design ensures controlled thread engagement, preventing damage to threaded inserts and reducing assembly time. With a fine thread spacing and Class 2A thread fit, it delivers precise alignment and vibration resistance, making it ideal for applications requiring repeated adjustments without compromising integrity. The material's strength and RoHS 3/REACH compliance further support long-term reliability in regulated sectors.

Specification Summary & Compliance

This thumb screw features a 10-32 UNF thread with Class 2A fit for consistent dimensional accuracy, a partially threaded shank of 1/4" length, and a 3/8" knurled head. It meets ASTM A581 manufacturing standards for quality assurance and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use in global industrial applications.