Double Arming Bolt Key Features :
Fully Threaded: Rolled threads along the entire length for versatile spacing.
Ready to Install: Includes 4 Square Nuts assembled.
Dual Cone Points: Cone points on both ends for easy starting.
High Strength: Meets IEEE C135.1 tensile requirement of 18,350 lbs.
Weather Proof: Hot Dip Galvanized to ASTM A153.
Double Arming Bolt Factory Production Process
The production of double arming bolts, critical for overhead power lines, follows a standardized process guided by ASTM A307 (carbon steel material), IEEE C135.80 (active standard) and historically IEEE C135.1. It starts with preparing ASTM A307 cold-drawn steel blanks, followed by cold heading for head forming (hot forging for large sizes), then shank turning and thread rolling per ASME B1.1. Heat treatment (quenching-tempering or normalizing) ensures strength, and hot-dip galvanizing per ASTM A153 provides corrosion resistance. Final inspection checks dimensions, mechanics and coating, with products packaged with matching parts for traceability, ensuring reliability for power line applications.
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 Double Arming Bolt:
- Overhead power transmission and distribution lines
- Securing cross arms, pole brackets and line hardware
- Supporting conductors and related accessories stably
- Adapting to various types of power poles
- Maintaining structural integrity against weather and mechanical stress
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
3/4 Inch Diameter Minmum Tensile Strength 18,350 LBS
| Part No. |
Size |
Bolt Length |
Thread Length |
Weight |
| Inch (A) |
Inch (B) |
Kg / Pcs |
| A0134-08 |
3/4"X8" |
8 |
4 |
0.536 |
| A0134-10 |
3/4"X10" |
10 |
6 |
0.645 |
| A0134-12 |
3/4"X12" |
12 |
6 |
0.736 |
| A0134-14 |
3/4"X14" |
14 |
6 |
0.855 |
| A0134-16 |
3/4"X16" |
16 |
6 |
0.964 |
| A0134-18 |
3/4"X18" |
18 |
6 |
1.036 |
| A0134-20 |
3/4"X20" |
20 |
6 |
1.145 |
| A0134-22 |
3/4"X22" |
22 |
6 |
1.218 |
| A0134-24 |
3/4"X24" |
24 |
6 |
1.345 |
| A0134-26 |
3/4"X26" |
26 |
6 |
1.436 |
Cross Reference (Industry Equivalents):
| Size |
Part No. |
HUBBELL |
MACLEAN |
| 3/4"X8" |
A0134-08 |
8908 |
J8908 |
| 3/4"X10" |
A0134-10 |
8910 |
J8910 |
| 3/4"X12" |
A0134-12 |
8912 |
J8912 |
| 3/4"X14" |
A0134-14 |
8914 |
J8914 |
| 3/4"X16" |
A0134-16 |
8916 |
J8916 |
| 3/4"X18" |
A0134-18 |
8918 |
J8918 |
| 3/4"X20" |
A0134-20 |
8920 |
J8920 |
| 3/4"X22" |
A0134-22 |
8922 |
J8922 |
| 3/4"X24" |
A0134-24 |
8924 |
J8924 |
| 3/4"X26" |
A0134-26 |
8926 |
J8926 |
(Note: Manufacturer part numbers are for reference only. Yokelink products are interchangeable based on IEEE standards.)
Frequently Asked Questions (FAQ)
1.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
2.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.
3.Q: Are your Double Arming Bolts fully threaded?
A: Yes. Yokelink 3/4" DA Bolts are threaded along their entire length (unless otherwise specified). This allows you to position the locking nuts anywhere on the bolt to accommodate varying crossarm spacings.
4.Q: Do the nuts spin freely on the galvanized threads?
A: Absolutely. We use an oversized tapping process for the nuts after galvanizing to ensure a smooth, finger-tight fit. Every bolt is checked with a Go/No-Go gauge before packing to guarantee you won't be fighting with stuck nuts on the pole.
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
ASTM A153 vs IEEE C135.1: Hot-Dip Galvanizing Standards for Fasteners
IEEE C135.1 Specification Download:
