S-91725A150 5/8"-11 Thumb Nuts

Key Features & Benefits at a Glance

• Enhanced manual grip with knurled head texture for secure handling without tools in tight spaces
• Superior corrosion resistance from 18-8 stainless steel construction for long service life in harsh environments
• Space-saving low profile design with 1/2" height for applications with limited clearance
• Reliable coarse thread engagement using 5/8"-11 UNC threads for quick assembly and reduced cross-threading risk
• Precision thread fit with Class 2B tolerance ensuring consistent performance and vibration resistance
• Multi-point security through four 1/4" holes enabling positive locking with safety wiring or pins
• Regulatory compliance meeting RoHS 3 and REACH standards for safe use across industrial sectors

Professional Applications & Engineering Value

This low profile thumb nut delivers exceptional value in applications requiring frequent manual adjustments or where tool access is restricted. The 18-8 stainless steel construction provides excellent corrosion resistance, making it ideal for food processing equipment, marine hardware, and outdoor machinery exposed to moisture and chemicals. The knurled round head offers superior tactile grip even with greasy hands or gloves, while the UNC coarse threads ensure rapid installation and removal. The four-hole design allows for positive locking mechanisms, preventing accidental loosening in high-vibration environments such as automotive assemblies, industrial machinery, and electrical enclosures. This combination of features addresses common challenges of maintenance accessibility, corrosion prevention, and vibration-induced failure in demanding industrial applications.

Specification Summary & Compliance

This thumb nut features 5/8"-11 UNC coarse threads with Class 2B thread fit per ASME B1.1 standards, ensuring precise engagement and reliable performance. The low profile round head measures 1 3/8" in diameter with a height of 1/2", providing optimal clearance in confined spaces. Manufacturing complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming environmental safety and material restrictions adherence. The right-hand thread direction and four 1/4" holes support standard industrial fastening practices and secondary locking requirements.