ANSIIEEE C135.20 Spool Insulator Deadend Clevis D Iron Bracket for poleline hardware

2 month ago

5 0 

Ningbo Yaoke Hardware Products Co., Ltd.

2 year

Product details

Secondary Insulator Clevis HDG | ANSI C135.20 Pole Hardware | Utility Pole Attachment

Engineered for High-Reliability Insulator Anchorage.

The Yokelink Insulator Clevis (Secondary/Spool Clevis) is designed to mount secondary conductors and spool or suspension insulators securely to utility poles and crossarms. Engineered to bear heavy deadend and angular tension, it serves as an indispensable connecting joint in overhead distribution networks.

Fully Compliant with ANSI C135.20 Standards:

Manufactured in strict accordance with ANSI C135.20 performance specifications. The clevis body is formed from heavy-gauge, high-yield carbon steel with smooth, rounded edges to prevent stress concentration. The mounting holes are precision-punched to accept standard 5/8" machine bolts or lag screws, ensuring rigid attachment to wooden or steel poles.

Secure Locking Pin & Heavy HDG Armor:

Supplied complete with a high-strength steel clevis pin and a corrosion-resistant Stainless Steel Cotter Pin (Humpback Cotter Pin) to physically lock the assembly, preventing pin backing-out under high line vibration. The entire assembly is fully Hot Dip Galvanized to ASTM A153 standards for decades of rust-free protection in aggressive outdoor environments.

Key Technical Features of Insulator Clevis:

Industry Standard: Fully manufactured and tested to comply with ANSI C135.20 specifications.

Structural Integrity: Heavy-gauge steel body formed for maximum tensile and bending resistance.

Insulator Protection: Smoothly contoured interior fits standard ANSI spool and suspension insulators without pinching.

Vibration Safety: Includes steel clevis pin locked with a heavy-duty stainless steel cotter pin.

Corrosion Shield: Heavy Hot Dip Galvanized (HDG) coating per ASTM A153.

Production Process of Insulator Clevis:

Carbon steel blanks are hot forged into clevis shape, then trimmed and deburred. Holes are precisely drilled and reamed for pins. Workpieces undergo quenching and tempering to raise tensile strength. All parts are hot-dip galvanized for corrosion resistance. Dimensional, load and appearance inspections are conducted before packaging.

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.

Application of Insulator Clevies

Insulator clevises are essential connecting fittings for overhead power lines. They link insulators with crossarms, guy fittings and wire clamps to bear tension stably. Galvanized steel offers reliable anti-corrosion performance outdoors. Widely adopted in distribution and transmission poles for safe connection of insulator assemblies.

Technical Specifications of Insulator Clevies

Part No.	Figure	A	B	C	D	Weight
Part No.	Figure	Inch	Inch	Inch	Inch	Kg / Pcs
C0410	1	4 1/4	2 3/8	1 1/2	5/8	0.540
C0420	1	5	3 3/8	1 1/2	5/8	0.690
C0430	2	4	3 3/8	1 1/4	5/8	0.764
C0440	2	4	3 3/8	1 1/2	5/8	0.636
C0450	3	4	3 3/8	4	5/8	0.955

Cross Reference (Industry Equivalents):

Figure	Part No.	HUBBELL	MACLEAN
Figure	Part No.	HUBBELL	MACLEAN
1	C0410	0341	J0313
1	C0420	0340	J0342
2	C0430	468	J93
2	C0440	469	J093
3	C0450	0327	J1300

Frequently Asked Questions (FAQ)

Q1: What is the main application of a Secondary Insulator Clevis on utility poles?

A: A Secondary Insulator Clevis is used to deadend or support low-to-medium voltage secondary distribution cables. It holds a porcelain or polymer spool insulator (such as ANSI Class 53-2) in place, allowing the conductor wire to wrap around the insulator smoothly while taking up structural tension without damaging the pole body.

Q2: Why is the cotter pin material so critical for insulator clevis assemblies?

A: High winds and continuous conductor vibration can cause the clevis pin to rotate slowly. If a standard plain steel cotter pin rusts and breaks, the clevis pin will eventually back out, causing the insulator and live conductor line to drop. Yokelink supplies high-strength Stainless Steel Cotter Pins with all clevis assemblies to ensure zero rust, permanent locking, and ultimate public safety.

Q3: What does ANSI C135.20 compliance guarantee for an Insulator Clevis?

A: ANSI C135.20 is the standard specification for American utility spool and secondary clevises. Compliance guarantees that the steel body has passed rigorous mechanical Ultimate Tensile Tests (ensuring it won't stretch or yield under rated load) and that the clevis dimensions precisely match standard ANSI spool insulators for hassle-free field assembly.

Q4: How do I mount an Insulator Clevis to a wooden vs. steel utility pole?

A: On utility wooden poles, an Insulator Clevis is typically mounted using a single 5/8" Hot Dip Galvanized Machine Bolt or a lag screw through its pre-punched back hole. For steel or concrete poles, it is installed using a Pole Band (or stainless steel strapping bracket) that wraps around the pole body to secure the clevis base without drilling.

Q5: Can an Insulator Clevis handle angled or side-pulling tension?

A: Yes, to a degree. The rounded U-body geometry allows the spool insulator to swivel slightly to accommodate small angle turns in the line run. However, for sharp corner turns (greater than 30 degrees) or heavy deadend terminations, best utility engineering practice dictates using a heavy-duty forged Deadend Clevis or pairing two clevises to share the bending load.

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.