S-90738A110 1/4"-28 Hex Nuts

Key Features & Benefits at a Glance

• Exceptional tensile strength with Grade 5 certification ensures reliable performance in demanding applications and prevents premature failure
• Superior corrosion resistance from zinc-plated steel coating extends service life in harsh industrial environments and outdoor conditions
• Precision left-hand threading (1/4"-28 UNF) provides secure fastening in specialized assemblies requiring reverse-thread applications
• Fine thread spacing delivers enhanced vibration resistance and superior clamping force compared to coarse-thread alternatives
• Class 2B thread fit guarantees consistent engagement and smooth installation with mating components
• Standard external hex drive enables quick installation and removal with common wrench tools, reducing assembly time
• Full regulatory compliance with RoHS 3 and REACH standards ensures environmental responsibility and global market acceptance

Professional Applications & Engineering Value

This Grade 5 left-hand hex nut delivers critical engineering solutions where standard right-hand threads would compromise safety or functionality. The zinc-plated steel construction provides essential corrosion protection for industrial equipment, automotive components, and machinery exposed to moisture or chemicals. The 1/4"-28 UNF fine threading offers superior resistance to vibrational loosening in high-stress applications, while the left-hand thread direction is specifically engineered for rotating shaft applications where conventional threading would naturally loosen. This combination of material strength, precise Class 2B thread fit, and specialized threading addresses common failure points in mechanical systems, providing engineers with a reliable fastening solution that maintains integrity under continuous operational stress.

Specification Summary & Compliance

Manufactured to exact inch system standards with dimensions of 7/16" width and 7/32" height. Features UNF fine threading (1/4"-28) with Class 2B thread fit tolerance for precision engagement. Constructed from zinc-plated steel with Grade 5 strength rating for medium-duty applications. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across industrial sectors.