S-91875A150 3/8"-16 Cap Nuts

Key Features & Benefits at a Glance

• Superior corrosion protection with zinc plating that extends service life in demanding industrial environments
• Reliable coarse thread engagement with UNC 3/8"-16 specification for faster assembly and reduced cross-threading risks
• Secure external hex drive design enables high-torque installation with standard tools for vibration-resistant connections
• Precision Class 2B thread fit ensures consistent mating with male threads while maintaining installation smoothness
• Durable steel construction provides excellent tensile strength for heavy-duty fastening applications
• Complete end coverage with standard cap profile protects threads and creates finished appearance
• Environmental compliance with RoHS 3 standards meets regulatory requirements for industrial usage

Professional Applications & Engineering Value

This zinc-plated steel cap nut delivers critical performance advantages for industrial assembly operations where both corrosion resistance and mechanical reliability are paramount. The UNC coarse thread configuration significantly reduces installation time while providing secure fastening in applications subject to vibration or dynamic loads. The external hex drive accommodates standard wrenches and sockets, enabling precise torque application for connections requiring consistent clamping force. The combination of Class 2B thread fit and robust steel construction ensures dependable performance in machinery, equipment manufacturing, and structural applications where fastener integrity directly impacts operational safety and maintenance intervals. The zinc plating creates a sacrificial barrier that actively resists oxidation, making these cap nuts suitable for both indoor and moderate outdoor environments.

Specification Summary & Compliance

Manufactured to precise dimensional standards with Class 2B thread fit tolerances ensuring compatibility with Class 2A external threads. Thread specification conforms to UNC 3/8"-16 coarse thread standards with right-hand thread direction. Physical dimensions include 9/16" width across flats and 5/8" total height. Compliant with RoHS 3 (2015/863/EU) regulations under exemption 6(a)-I for lead as an alloying element in steel. The external hex drive configuration follows industry-standard tool interfaces for consistent installation performance.