S-91512A180 10-32 x 3/4" Left-Hand-Thread Stainless Steel Hex-Drive Flat Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction and passivated finish for extended service life in harsh environments
• Exceptional thread engagement with Class 3A fine UNF threads ensuring precise, vibration-resistant connections in critical assemblies
• High mechanical strength delivering 70,000 psi tensile strength and Rockwell B70 hardness for reliable performance under heavy loads
• Secure left-hand threading providing counter-rotational security in applications where standard right-hand threads might loosen
• Optimal flush mounting with standard 82° countersink angle and flat head design for smooth surface finishes
• Efficient installation through hex drive compatibility offering superior torque transmission and reduced cam-out risk
• Full regulatory compliance meeting RoHS 3 and REACH environmental standards for global industrial applications

Professional Applications & Engineering Value

These 10-32 UNF left hand thread flat head screws solve critical engineering challenges in applications requiring reverse-threading security and corrosion resistance. The 18-8 stainless steel material with passivated finish provides exceptional protection against chemical exposure and oxidation, making them ideal for marine equipment, food processing machinery, and outdoor industrial installations. The Class 3A fine thread specification ensures tighter tolerances and superior vibration resistance compared to standard threads, while the left-hand threading prevents accidental loosening in rotating machinery components. The combination of 70,000 psi tensile strength and fully threaded design delivers maximum load distribution and pull-out resistance, making these flat head screws essential for precision assemblies where reliability cannot be compromised.

Specification Summary & Compliance

Manufactured to precise Class 3A thread fit standards with UNF fine threading (10-32 size) and left-hand thread direction. Features include 0.19" thread diameter, 3/4" length, 82° countersink angle, and hex drive compatibility (1/8" drive size). Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across global industrial markets.