Key Features of Hex Head Bolt:
Head Style: Precision Hex Head for easy socket/wrench installation.
Strength: Rated for a minimum tensile load of 12,400 lbs.
Finish: Premium Hot Dip Galvanized for long-lasting rust protection.
Threads: Smooth, rolled UNC threads ensure consistent nut fit.
Assembly: Supplied with one matching Hex Nut (or Locknut upon request).
Production Process of Hex Head Bolt
Hex head bolts are produced from ASTM A307 carbon steel. After straightening and cutting, the material is formed into a hexagonal head through cold heading for high precision and efficiency. The shank is then processed by thread rolling to ensure accurate threads. Heat treatment is applied to meet required mechanical properties. All bolts are hot-dip galvanized in accordance with ASTM A153 for corrosion resistance. The entire production and inspection comply with IEEE C135.1 and IEEE C135.80, making them suitable for overhead line and industrial fastening.
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 C135.1 / IEEE C138.80 or CSA 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.
Key Application Scenarios of Hex Head Bolt:
Hex head bolts are widely used in overhead transmission and distribution lines, steel structures, and general industrial assembly. They provide strong, stable fastening for cross arms, poles, brackets, and mechanical equipment. Manufactured from ASTM A307 carbon steel and hot-dip galvanized per ASTM A153, they feature excellent corrosion resistance. Fully compliant with IEEE C135.1 and IEEE C135.80 standards, they ensure reliable performance and secure connection in long-term outdoor and heavy-duty applications.
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 Double Arming Bolt
5/8 Inch Diameter Minmum Tensile Strength 12,400 LBS
| Part No. |
Size |
Bolt Length |
Thread Length |
Weight |
| Inch (A) |
Inch (B) |
Kg / Pcs |
| A0658-04 |
5/8"X4" |
4 |
3 |
0.227 |
| A0658-06 |
5/8"X6" |
6 |
3 |
0.282 |
| A0658-08 |
5/8"X8" |
8 |
4 |
0.373 |
| A0658-10 |
5/8"X10" |
10 |
6 |
0.410 |
| A0658-12 |
5/8"X12" |
12 |
6 |
0.491 |
Frequently Asked Questions (FAQ)
Q1: Are these hex bolts suitable for extreme weather and coastal environments?
(Are these hex bolts suitable for extreme weather and coastal environments?)
A: Absolutely. All our hex head bolts are Hot Dip Galvanized to ASTM A153 Class C specifications. This heavy-duty zinc coating provides superior corrosion resistance, making them fully capable of withstanding high-salinity coastal air, extreme heat, and severe weather conditions.
Q2: Do these bolts feature rolled threads or cut threads?
(Are these bolts rolled or cut?)
A: We utilize UNC rolled threads on our hex head bolts. The thread rolling process preserves the grain structure of the steel, resulting in higher tensile strength, superior fatigue resistance, and a smoother fit for the nut compared to traditional cut threads.
Q3: What hardware is included with the bolt?
(What accessories does the bolt contain?)
A: Each standard hex head bolt is supplied fully assembled with one matching Hex Nut. If your project requires enhanced vibration resistance, we can also supply them with specialized Locknuts or washers upon request.
Q4: What manufacturing standards do Yokelink Hex Bolts meet?
A: Our bolts are manufactured in strict accordance with ANSI/ASME B18.2.1 specifications, ensuring precise dimensional tolerances, accurate wrench fit, and reliable structural integrity for utility applications.
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
We offer Free Samples to qualified commercial buyers for testing and approval.
Reference Information:
For IEEE C135.1 technical details behind our specification, see Understanding IEEE C135.1 Standard
IEEE C135.1 Specification Download:
