S-93975A120 1/4"-28 ASME B1.1 Weld Nuts

Key Features & Benefits at a Glance

• Superior Alignment & Weld Integrity: Square shape ensures precise positioning during welding, preventing rotation and ensuring consistent joint strength.
• High-Strength Steel Construction: Manufactured from durable steel for reliable performance in demanding industrial environments and high-vibration applications.
• Precision Fine Threads (UNF): 1/4"-28 UNF fine thread provides a tighter, more secure fit with Class 2B tolerance, reducing the risk of loosening.
• Optimized Collar Design: 13/32" collar diameter and 0.063" height offer an ideal welding surface for strong, permanent attachments to 27/64" diameter holes.
• Certified Compliance & Reliability: Meets ASME B1.1 standards and is fully compliant with RoHS 3 and REACH regulations for safe, global use.
• Streamlined Installation: Right-hand thread direction and standard 1/2" width allow for quick, tool-friendly assembly in high-volume production settings.
• Long-Term Durability: Resists corrosion and wear, ensuring a long service life and reducing maintenance costs in structural and machinery applications.

Professional Applications & Engineering Value

This square weld nut is engineered to solve critical challenges in metal fabrication and assembly. The steel construction provides the necessary tensile strength for structural components, while the square shape prevents spin-out during the welding process, a common failure point in round nuts. This is vital in automotive frames, machinery chassis, and construction equipment where misalignment can lead to catastrophic joint failure. The 1/4"-28 UNF fine thread offers a higher number of threads per inch compared to coarse threads, resulting in superior load distribution and vibration resistance. This makes it an ideal industrial fastener for applications subjected to dynamic stresses. The precise collar design ensures a clean, strong weld bead, guaranteeing the nut becomes a permanent, load-bearing part of the assembly, enhancing overall structural integrity and safety.

Specification Summary & Compliance

This weld nut features a Class 2B thread fit per ASME B1.1, ensuring dimensional accuracy and interchangeability. The manufacturing and material composition are fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming it is free from hazardous substances. Key dimensions include a 13/32" collar diameter, 1/2" width, and it is designed for use with a 27/64" hole diameter.