S-90429A265 1 1/4"-12 x 3 1/2" ASTM F835 Alloy Steel Hex Drive Flat Head Screws
Alloy Steel Hex Drive Flat 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
- Exceptional tensile strength of 130,000 psi ensures reliable performance under heavy loads and prevents fastener failure in demanding applications.
- Precision Class 3A thread fit guarantees secure, vibration-resistant connections, minimizing the risk of loosening in critical assemblies.
- High Rockwell C37 hardness provides superior resistance to wear and deformation, extending the service life of the screw.
- Fully threaded design offers maximum grip length and holding power along the entire shank for a more secure fastening.
- 82° countersink angle and flat head allow for a flush finish, ideal for applications where a smooth surface is required.
- 7/8" hex drive facilitates easy and efficient installation with standard tools, reducing assembly time.
- Compliant with ASTM F835, RoHS 3, and REACH ensures the screw meets rigorous industry standards for quality and environmental safety.
Professional Applications & Engineering Value
This alloy steel flat head screw is engineered to solve critical challenges in heavy machinery, structural steelwork, and high-vibration environments. Its Class 3A thread fit and fine thread spacing provide superior clamping force and resistance to loosening, a common failure point in dynamic loads. The combination of 130,000 psi tensile strength and Rockwell C37 hardness ensures the fastener can withstand extreme stress without shearing or deforming. The 82° countersink angle and flat head profile are specifically designed for applications requiring a smooth, flush surface, such as in precision equipment and metal fabrications, preventing snagging and improving safety. Manufactured to ASTM F835, it delivers the reliability demanded by industrial and engineering sectors.
Specification Summary & Compliance
This screw features a 1 1/4"-12 UNF thread with a precision Class 3A thread fit and fine thread spacing. It is manufactured from high-strength alloy steel to the ASTM F835 specification. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring it is free from hazardous substances and safe for use in various industrial markets.
