Pole Top Pin

2 week ago

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Ningbo Yaoke Hardware Products Co., Ltd.

2 year

Product details

Pole Top Pin HDG | ANSI C135.17 Insulator Pin | Insulator Pole Top Pin

The Yokelink Pole Top Pin is engineered to mount securely at the very peak of utility wooden or concrete poles, providing a rigid, high-strength vertical support for pin-type insulators. Positioned at the highest point of the distribution line, these pins are built to withstand heavy dynamic wind, ice, and conductor tension loads without deflecting.

Fully Compliant with ANSI C135.17 Standards:

Designed and tested in strict accordance with ANSI C135.17 utility hardware specifications. The body of our pole top pin is formed from heavy-gauge hot-rolled channel steel, ensuring maximum bending moment resistance. The mounting base features precision-spaced slots to accommodate standard 5/8" machine bolts, allowing for seamless installation on a variety of pole diameters.

Thread Types and Premium Corrosion Shield:

Available with either factory-molded Alloy Lead Threads or rugged Nylon/Noryl Plastic Threads (in standard 1" or 1-3/8" diameters) to ensure a perfectly smooth, non-binding interface with porcelain or composite insulators. The entire steel body is fully Hot Dip Galvanized to ASTM A153 standards to deliver decades of maintenance-free service in severe outdoor weather conditions.

Key Technical Features of Pole Top Pin

Standard Approved: Engineered to fully satisfy ANSI C135.17 performance and dimension tests.

Max Bending Resistance: Hot-rolled channel steel body resists high lateral conductor loads.

Insulator Compatibility: Offers standard 1" or 1-3/8" ANSI lead/nylon threads.

Hassle-Free Mounting: Pre-punched slots accept standard 5/8" pole line bolts.

Atmospheric Protection: Heavy Hot Dip Galvanized (HDG) coating per ASTM A153.

Production Process of Pole Top Pin

High‑strength carbon steel is cut into blanks and hot‑forged into the main structure. Drilling and thread‑rolling are carried out for insulator assembly. Quenching and tempering improve tensile strength. The part is hot‑dip galvanized following ASTM A153 standard. Dimensional check, hardness test and visual inspection are finished before packing.

Yokelink Quality Control and Testing Equipments

We don't just reference standards; we also verify them in practice: each batch of products undergoes destructive tensile testing in our internal laboratory to ensure load performance exceeds the minimum requirements of IEEE C135.2 or CSA C83 specification; we use optical comparators to ensure the geometric accuracy of chamfered tips and rolled threads, enabling convenient on-site installation; at the same time, we conduct comprehensive testing on Rockwell hardness, coating thickness, and other parameters, and each shipment is accompanied by the original manufacturer's material specifications (MTRs) and quality inspection reports, with all data traceable back to the raw material furnace number.

Yokelink Product Quality Inspection Report

We provide comprehensive inspection services for machine bolts, including SGS test bolts and formal Production Part Inspect Report (PPIR). The SGS tests verify the bolts’ compliance with international standards like ASTM A307 and IEEE C135.80, covering mechanical properties and corrosion resistance. The PPIR details all inspection items, ensuring each machine bolt meets dimensional, performance and quality requirements, providing reliable quality assurance for overhead line and industrial applications.

Technical Specifications of Pole Top Pin

Part No.	Head Material	Insulator Size	Overall Length	Weight
Part No.	Head Material	Inch	Inch	Kg / Pcs
C0210	Nylon / Lead	1	18	1.30
C0220	Nylon / Lead	1	20	1.45
C0230	Nylon / Lead	1	24	2.00
C0240	Nylon / Lead	1 3/8	20	1.48
C0250	Nylon / Lead	1 3/8	24	2.05

Cross Reference (Industry Equivalents):

Insulator Size	Part No.	HUBBELL	MACLEAN
Inch	Part No.	HUBBELL	MACLEAN
1	C0210	2170	J1368Z
1	C0220	2174	J740Z
1	C0230	2171	J744Z
1 3/8	C0240	2195	J720Z
1 3/8	C0250	2196

Frequently Asked Questions (FAQ)

Q1: What is the main design difference between a Channel Steel and a Flat Steel Pole Top Pin?

A: The difference lies in load-bearing capacity. Channel Steel pole top pins use a U-shaped channel profile, which provides exceptionally high resistance to bending moments from lateral wind loads on the conductor. They are used for heavy-duty main distribution lines. Flat Steel (strap) pins are lighter and thinner, making them suitable for light-duty lateral runs or poles where lateral tension is minimal.

Q2: Should I specify a Lead Thread or a Nylon Thread for my Pole Top Pin?

A: Both are ANSI compliant, but they serve different preferences. Lead Threads (molded directly onto the steel pin) have been the industry standard for decades, offering excellent thread locking and durability for heavy porcelain pin insulators. Nylon Threads (high-strength engineered plastic) are increasingly popular because they are lighter, more economical, completely eliminate any risk of galvanic reaction, and provide a slightly cushioned fit for composite/polymer insulators.

Q3: How does ANSI C135.17 compliance guarantee the safety of these pins?

A: ANSI C135.17 is the benchmark standard for utility-grade insulator pins. Compliance guarantees that the pole top pin has undergone strict physical and mechanical testing, specifically the Bending Moment Test (to ensure the pin will not snap or deform under the specified lateral load limit) and dimensional checks on the thread pitch to ensure zero slippage of the insulator.

Q4: How do I secure the Pole Top Pin to a wooden utility pole?

A: Pole top pins are typically mounted using two standard 5/8" Hot Dip Galvanized Machine Bolts or double-arming bolts. The pin's base is engineered with a vertical slot at the bottom and a hole at the top. The slot allows for slight adjustments in bolt spacing on the field, ensuring easy alignment even if the pole holes were drilled slightly off-center.

Q5: Can these pins withstand severe coastal salt-spray environments?

A: Yes, because of our strict adherence to hot-dip galvanizing standards. At Yokelink, all carbon steel components of our pole top pins are galvanized in accordance with ASTM A153. This creates a thick, multi-layered iron-zinc alloy coating that protects the underlying steel from atmospheric corrosion, ensuring a service life of 30 to 50 years even in highly humid, coastal, or industrial areas.

Value-Added Supply Chain Services

1. Blanket Order & Free Warehousing Yokelink VALUE ADDED SUPPLY CHAIN (3)

Yokelink offers Blanket Order programs: Place an annual order to lock prices, we manufacture your total volume and hold stock in our facility free of charge. Split Shipments: Schedule partial shipments (e.g., monthly or quarterly) based on your project progress. You get the benefits of just-in-time delivery without the risk of shortages.

2. DDP Shipping (USA Duties Included)Landed Cost Certainty:

We handle the complex logistics. Our DDP (Delivered Duty Paid) service covers sea freight, US Customs clearance, and Section 301 tariffs. The price we quote is the final price delivered to your door / Warehouse.

3. Free Sample Program

We offer Free Samples to qualified commercial buyers for testing and approval.

4. Empowering Latin America's Utility Infrastructure

We have established a robust supply chain and a proven track record across Brazil, Mexico, El Salvador, Honduras, Nicaragua, Ecuador, Bolivia, Chile, Peru, Uruguay, Guatemala, Argentina, and the Dominican Republic. From standard distribution lines to complex 34.5 kV double-circuit transmission projects, leading utility contractors trust Yokelink for uncompromising quality and on-time delivery.