S-91266A624 3/8"-16 x 1" ASTM F835 Alloy Steel Thread-Locking Hex Drive Flat Head Screws
Alloy Steel Thread-Locking Hex Drive Flat Head Screws
Image may differ from product. See technical specification for details.
Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
- Fast delivery
- Enjoy discounts on bulk purchases
- Secure Payment
- Fast Global Shipping
Key Features & Benefits at a Glance
- Permanent vibration resistance with nylon patch thread locker that maintains secure fastening from -65° to 250°F
- Superior corrosion protection through black-oxide coating on alloy steel for extended service life in harsh environments
- Maximum load-bearing capacity with 130,000 psi tensile strength and Rockwell C39 hardness for heavy-duty applications
- Precision thread engagement with Class 3A fit and UNC coarse threads ensuring reliable installation and reduced cross-threading risk
- Streamlined flush mounting featuring 82° countersink angle and flat head design for seamless surface integration
- Enhanced installation efficiency with 7/32" hex drive enabling high-torque application without cam-out
- Full-thread engagement along the entire 1" length for optimal grip strength across material thicknesses
Professional Applications & Engineering Value
Engineered for demanding industrial assemblies, these black-oxide alloy steel flat head screws solve critical vibration-induced loosening challenges in machinery, automotive, and structural applications. The permanent nylon patch locking technology creates a chemical bond that outperforms mechanical lock washers, maintaining clamp force under extreme thermal cycling (-65° to 250°F). The Class 3A thread fit with UNC coarse threading provides rapid installation in steel frameworks while the 82° countersink ensures flush mounting in precision equipment. With fully threaded design and hex drive compatibility, these fasteners deliver consistent performance in high-stress environments where reliability is non-negotiable.
Specification Summary & Compliance
Manufactured to precision Class 3A thread fit with UNC 3/8"-16 coarse thread spacing and right-hand orientation. Complies with ASTM F835 specifications for mechanical properties and meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations. The 82° countersink angle conforms to standard flat head profiles while the fully threaded 1" length maintains dimensional consistency across production batches.
