S-92245A546 1/4"-20 x 1 1/2" FF-S-85, MS35307-312 Mil. Spec. 18-8 Stainless Steel Hex Head Screws
Mil. Spec. 18-8 Stainless Steel Hex 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 passivated 18-8 stainless steel construction, ideal for harsh industrial environments.
- High tensile strength of 70,000 psi ensures reliable performance under significant mechanical stress.
- Class 2A thread fit provides consistent assembly and easy installation with standard UNC coarse threading.
- Partially threaded design allows for precise clamping force and secure fastening in specific applications.
- External hex drive and hex head facilitate quick, high-torque installation with common tools.
- Compliance with Fed. Spec. FF-S-85 (MS35307-312) guarantees adherence to strict federal standards for quality and reliability.
- RoHS 3 and REACH compliant ensures environmental safety and regulatory acceptance in global markets.
Professional Applications & Engineering Value
This 1/4-20 UNC hex head screw is engineered to address critical challenges in industrial and engineering settings. Made from passivated 18-8 stainless steel, it offers exceptional resistance to corrosion and oxidation, making it suitable for outdoor, marine, and chemical-exposed applications. The coarse UNC thread and Class 2A thread fit ensure quick, secure fastening with reduced risk of cross-threading, while the partially threaded design provides optimal grip and vibration resistance in machinery, construction, and automotive assemblies. With a tensile strength of 70,000 psi and Rockwell B74 hardness, it delivers durability and reliability under high-stress conditions, supporting long-term performance in demanding environments.
Specification Summary & Compliance
This screw features a 1/4"-20 UNC coarse thread with Class 2A thread fit for precise dimensional accuracy and ease of assembly. It meets Fed. Spec. FF-S-85 (MS35307-312) for quality assurance and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material integrity.
