Hot Dip Galvanized Insulator Spindle Pin Cross Arm Insulator Pin

Insulator spindle pin (also named cross arm insulator pin, pin insulator spindle) is a core overhead power line hardware, widely used to fix pin type porcelain insulators and glass insulators on cross arms of distribution transmission lines, stabilizing insulators against wind vibration and external mechanical load, which is essential for low and medium voltage overhead power projects.

Material

We adopt high-quality Q235B / A36 carbon steel as raw material. The finished product is processed by hot-dip galvanizing (HDG) in accordance with ASTM A153 standard. The uniform zinc coating provides outstanding anti-rust and anti-corrosion performance, adapting to harsh outdoor environments such as coastal, rainy, high-salt and dusty areas, long service life over 20 years.

Product Specifications

Multiple standard sizes are available: M12, M14, M16, M18, M20, M22, with long shank and short shank options. Complete sets come with matched nuts and flat washers. Threads can follow metric thread, NEMA standard thread. Custom drawings & OEM / ODM customization are supported, including customized length, flange size, marking logo to meet different regional power standards (ANSI, BS, AS, ISO).

Production Process & Quality Control

1. Raw material incoming inspection: chemical composition and tensile strength test for steel bar

2. Forging / Turning forming, thread rolling

3. Hot dip galvanizing treatment

4. Zinc thickness inspection, thread protection, dimensional checking

5. Salt spray test, load tension test

6. Packaging: woven bag or plywood case for export, suitable for sea freight (Tianjin port shipment available)

Our factory is a professional manufacturer of power line fittings. All insulator spindle pins are strictly tested before delivery, stable mechanical strength, no zinc peeling, smooth thread for easy installation. We support small trial order and bulk order, supply for power utility contractors, distributors and overseas power projects.