S-9634K24 1/4"-28 x 1 1/4" Hanger Bolts

Key Features & Benefits at a Glance

• Superior corrosion resistance with black-oxide steel finish, extending service life in humid or demanding environments
• Precise UNF fine threading (1/4"-28) ensures secure, vibration-resistant connections in extension spring assemblies
• Optimized 7/8" minimum thread engagement provides reliable load distribution and prevents premature failure
• Right-hand thread design enables straightforward installation and compatibility with standard industrial tools
• 0.15" pre-drilled hole diameter facilitates quick integration with mounting hardware and spring attachments
• Full compliance with RoHS 3 and REACH regulations guarantees environmental safety and global market acceptance
• Robust 1 1/4" stud length offers versatile spacing solutions for various extension spring configurations

Professional Applications & Engineering Value

Engineered for extension spring systems, this black-oxide steel hanger bolt addresses critical challenges in industrial suspension and tension applications. The UNF fine thread (1/4"-28) maintains clamping force under dynamic loads, while the corrosion-resistant coating prevents degradation in outdoor or high-moisture settings. Its right-hand thread orientation simplifies maintenance cycles, and the standardized 0.15" hole diameter streamlines assembly with spring hooks and mounting plates. Ideal for automotive suspensions, agricultural machinery, and material handling equipment, this stud delivers reliable performance where fatigue resistance and environmental compliance are paramount.

Specification Summary & Compliance

Manufactured to UNF fine thread standards with consistent Class 2A tolerances for reliable fit. The black-oxide steel construction meets mechanical performance requirements for stud-type fasteners. Fully compliant with RoHS 3 (2015/863/EU) under exemption 6(a) for lead alloying in steel, and REACH (EC 1907/2006) SVHC requirements as of January 2023. Designed specifically for extension spring anchor points with 1 1/4" total length and 7/8" minimum threaded engagement length.