S-90185A136 1/2"-13 x 1" ASME B18.5, SAE J429 Carriage Bolts

Key Features & Benefits at a Glance

• Superior anti-rotation performance thanks to the integrated square neck that securely locks into materials, preventing spinning during installation and under vibration.
• Exceptional tensile strength rated at 120,000 PSI (Grade 5) ensures high reliability for demanding structural and heavy-duty applications.
• Enhanced corrosion resistance from the black-oxide steel finish, providing durable protection in various industrial environments.
• Optimized for rapid installation with a coarse UNC thread and fully threaded design, allowing for faster driving and secure fastening in wood and metal.
• Consistent dimensional accuracy with Class 2A thread fit, ensuring reliable engagement and interchangeability with standard nuts.
• Robust material hardness at Rockwell C25 offers excellent wear resistance and durability under repeated stress.
• Wide-rounded head profile distributes clamping force effectively, reducing surface damage and providing a finished appearance.

Professional Applications & Engineering Value

This Grade 5 carriage bolt is engineered to address critical challenges in construction, machinery assembly, and structural framing where vibration resistance and load-bearing integrity are paramount. The black-oxide steel construction combats rust and wear, extending service life in humid or outdoor settings. Its fully threaded UNC coarse thread design enables quick, deep penetration into materials, while the square neck mechanically locks the bolt in place, eliminating the need for secondary locking mechanisms and preventing loosening under dynamic loads. This combination of high tensile strength (120,000 PSI) and anti-rotation features makes it an ideal choice for securing heavy timber, steel connections, and industrial equipment, ensuring long-term stability and safety.

Specification Summary & Compliance

This carriage bolt adheres to precise dimensional standards, including a Class 2A thread fit for consistent tolerance and a 1/2"-13 UNC coarse thread specification. It is manufactured in compliance with ASME B18.5 and SAE J429 Grade 5 requirements, ensuring mechanical properties and interchangeability. The product is also verified to be RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, meeting environmental and safety regulations for hazardous substances.