S-91266A150 6-32 x 5/8" ASTM F835 Alloy Steel Thread-Locking Hex Drive Flat Head Screws
Alloy Steel Thread-Locking 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
- Vibration-resistant locking with Nylon Patch thread locker that maintains secure fastening even under dynamic loads and temperature fluctuations up to 250°F
- Exceptional tensile strength of 130,000 psi from alloy steel construction, ensuring reliable performance in high-stress industrial applications
- Precise Class 3A thread fit for superior engagement and reduced risk of cross-threading during assembly
- Corrosion-resistant black-oxide finish that enhances durability while meeting RoHS 3 and REACH environmental compliance standards
- Optimized flat head design with 82° countersink angle for flush mounting and clean aesthetic integration
- Full threading along the 5/8" length provides maximum grip depth and adjustment flexibility in various material thicknesses
- Hex drive compatibility with 5/64" tools enables high-torque installation without cam-out risks
Professional Applications & Engineering Value
Engineered for demanding environments, these black-oxide alloy steel flat head screws solve critical vibration-induced loosening problems in machinery, automotive assemblies, and electronic enclosures. The Nylon Patch thread locker creates permanent friction resistance without compromising the UNC coarse thread's rapid installation advantages. With Rockwell C39 hardness and 130,000 psi tensile strength, they maintain clamp force under thermal cycling from -65° to 250°F – ideal for engine components, HVAC systems, and conveyor equipment where thermal stability is paramount. The fully threaded design ensures uniform stress distribution, while the 82° countersink prevents surface protrusion in precision assemblies.
Specification Summary & Compliance
Manufactured to ASTM F835 specifications with Class 3A thread fit tolerance for precision assembly. Features UNC coarse thread spacing (6-32 size) with right-hand threading and 5/8" length. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations. The black-oxide surface treatment provides corrosion protection while maintaining dimensional stability across the specified temperature range.
