7/8'' Square Head Machine Bolt | 25,400 lbs Tensile | IEEE C135.1 & CSA C83 | Poleline Hardware

YOKELINK Square Head Machine Bolt is designed for pole line fastener applications in overhead transmission and distribution systems. Manufactured from hot roll carbon steel and finished with hot dip galvanizing per ASTM A153 Class C, this provides excellent corrosion resistance for long-term outdoor service in utility environments.

Yokelink Square machine bolts is produced in accordance with IEEE C135.1 / IEEE C135.80 and CSA C83 requirements and features rolled threads, ensuring superior fatigue resistance and consistent mechanical performance during installation and service life. The square head design allows secure tightening using standard lineman tools and prevents rotation when installed through crossarms, pole brackets, insulator hardware, and other pole line components.

Yokelink square machine bolts are widely used as direct equivalents to Hubbell Power Systems (Chance), MacLean Power Systems (MPS), and Allied Bolt products, making them ideal for OEM replacement, utility stock programs, and project-based procurement. Other lengths and 1 inch diameter machine bolts are available.

304 & 316 Stainless Steel Square machining bolts are available per the request...

• High Strength: Rated for 25,400 lbs tensile load (IEEE C135.1 / CSA Spec.)
• Cone Point: Speed up installation and prevent thread damage.
• Corrosion Resistance: Hot Dip Galvanized to ASTM A153 Class C, ensuring long-term protection in coastal and industrial environments.
• Ready to Install: Supplied with a HDG overtap square nut assembled.
• Dimentions accordance with ANSI/ASME B18.2.1.

(Note: Manufacturer part numbers are for reference only. Yokelink products are interchangeable based on IEEE standards.)

Square Head Machine Bolt Factory Production Process

At Yokelink, every machine bolt for poleline hardware begins with high-grade carbon steel, processed through our advanced hot forging lines. Our state-of-the-art facility controls every step of the production process—from raw material selection to final hot-dip galvanizing. This vertical integration allows us to guarantee consistent quality, competitive pricing, and on-time delivery for projects of any scale.

Quality assurance is built into this workflow, not added on. Our in-house laboratory rigorously tests every batch for tensile strength, thread fit, and HDG coating thickness to ensure strict compliance with IEEE C135.80 /CAS standards. Finally, we treat packaging as a critical manufacturing step: products are secured in heavy-duty, reinforced cartons and palletized with weather-proof wrapping. This ensures your hardware withstands the rigors of ocean freight and arrives at your warehouse rust-free, organized, and ready for the grid.

 

Frequently Asked Questions (FAQ)

 

1.Q: Do these square machine bolts meet IEEE and CSA specifications?

 

A: Yes. Yokelink square head machine bolts are manufactured in strict accordance with IEEE Std C135.80 (formerly ANSI C135.1) for tensile strength and dimensions. They are also fully compliant with CSA C83 standards, making them suitable for the Canadian utility market.

 

2.Q:Can I use Yokelink poleline fasteners bolts to replace Hubbell or MacLean parts?

 

A: Yes. Our poleline hardware bolts are functionally equivalent and interchangeable with industry-standard part numbers such as the Hubbell 82xx series and MacLean J82xx series. They meet or exceed the same mechanical load ratings (Min. Tensile Strength: 12,400 lbs for 5/8" diameter).

 

3.Q: Do you provide Mill Test Reports (MTRs) ,Drawing, or Factory Inspection Reports?

 

A: Yes, transparency is our standard. Full Mill Test Reports, Galvanizing Certificates, and Factory Inspection Reports are available with every shipment upon request, traceable to the raw material heat number.

 

 

Value-Added Supply Chain Services

 

1. Blanket Order & Free Warehousing

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

Reference Information:

IEEE C135.1 Specification Download: