S-94066A859 1/4"-28 x 1" Tamper-Resistant Drilled Spanner Stainless Steel Pan Head Screws
Tamper-Resistant Drilled Spanner Stainless Steel Pan Head 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 and passivated finish, ideal for harsh industrial environments.
- High tensile strength of 80,000 psi ensures reliable performance under heavy loads and vibrations.
- Precise Class 2A thread fit guarantees smooth assembly and secure fastening in fine-thread applications.
- Drilled spanner drive (No. 14 size) provides tamper-resistant installation and easy maintenance access.
- Fully threaded design offers maximum grip and uniform stress distribution along the entire length.
- Rockwell B96 hardness enhances durability and resistance to wear in repetitive use scenarios.
- Compliance with RoHS 3 and REACH ensures environmental safety and regulatory adherence for global supply chains.
Professional Applications & Engineering Value
Engineered for precision, this 1/4"-28 UNF rounded head screw addresses critical challenges in industrial assembly, such as vibration loosening and corrosion-induced failure. The 18-8 stainless steel construction, combined with a passivated finish, provides exceptional resistance to moisture, chemicals, and oxidation, making it suitable for marine, automotive, and electronics applications. The drilled spanner drive enables secure, tamper-resistant fastening in confined spaces, while the fine thread spacing and Class 2A fit ensure tight seals and reduced risk of stripping. Ideal for machinery, enclosures, and precision instruments, this screw delivers long-term reliability and minimizes maintenance downtime.
Specification Summary & Compliance
This screw adheres to UNF thread standards with a Class 2A thread fit for precise dimensional accuracy. It meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance, ensuring it is free from hazardous substances. Manufactured with a rounded pan head, right-hand thread direction, and fully threaded 1-inch length, it is designed for consistent performance in demanding environments.
