Double Arming Bolts
Double Arming Bolts
Double Arming Bolts
Double Arming Bolts
Double Arming Bolts
Double Arming Bolts
Double Arming Bolts
Double Arming Bolts
Double Arming Bolts
Double Arming Bolts
Double Arming Bolts
Double Arming Bolts

Double Arming Bolts

A double arming bolt, also known as a double threaded bolt, double ended bolt, or DA bolt, is a specialized type of fastener that features threads on both ends of the bolt. This unique design allows for secure attachment at multiple points along its length, offering a versatile solution for various applications.

Product Description

Product Overview:

Double arming bolts are specialized fasteners typically made from galvanized steel, designed to bridge and secure two separate clamp connections. The term ‘double’ refers to their ability to connect and stabilize two points simultaneously. These bolts feature equal thread lengths at both ends with a raised, unthreaded center section where equipment can hang. They are essential in ensuring the structural integrity and stability of utility poles and other structural applications.

Structural Features:

  1. Fully Threaded Design:
    • The bolts are fully threaded at both ends, providing strong and secure connections.
  2. Square Nuts Included:
    • Each bolt comes assembled with 4 square nuts, ensuring secure and stable fastening.
  3. Compatibility with Eye Nuts:
    • The ends of the bolts can accept eye nuts, making them suitable for dead-end applications.
  4. Raised Center Section:
    • Features a raised, unthreaded center section where equipment can be securely hung, ensuring proper alignment and stability.

Material:

  • Made from steel, hot-dip galvanized to provide excellent durability and resistance to corrosion, ensuring long-term performance even in harsh environmental conditions.

Installation Method:

  1. Preparation:
    • Ensure all necessary tools and materials are available before starting the installation process. Verify the specifications of the double arming bolts to ensure compatibility with the application.
  2. Positioning:
    • Align the bolt with the pre-drilled holes in the two structures or components to be connected.
  3. Inserting Bolts:
    • Insert the bolt through the aligned holes, ensuring the raised center section is properly positioned.
  4. Securing Nuts:
    • Attach the square nuts to both threaded ends of the bolt and tighten them securely using appropriate tools.
  5. Inspection:
    • Inspect the installation to ensure the bolts are securely fastened and the connection between the two components is stable and aligned.

Applicable Environmental Conditions:

  1. Temperature Range:
    • Suitable for operation in temperatures ranging from -40°C to +85°C, ensuring performance in extreme weather conditions.
  2. Humidity:
    • Can operate effectively in environments with high humidity, providing reliability in moist conditions.
  3. Weather Resistance:
    • Designed to withstand harsh weather conditions, including high winds, heavy rain, and UV exposure.

Specifications

5/8” Diameter – Minimum Tensile Strength 13,550 lbs

Catalog number Bolt
Length(in)
Weight/100(ibs)
LR8860 10 118
LR8862 12 136
LR8864 14 142
LR8866 16 158
LR8868 18 187
LR8870 20 192
LR8872 22 208
LR8874 24 224
LR8876 26 240
LR8877 28 256
LR8878 30 264
LR8879 32 284
LR8880 34 295
LR8881 36 332

 

7/8” Diameter – Minimum Tensile Strength 27,700 lbs

 

Cataiog number Bolt
Length (in)
Weight/100(lbs)
LR9112 12 283
LR9114 14 312
LR9116 16 341
LR9118 18 370
LR9120 20 399
LR9122 22 427
LR9124 24 456
LR9126 26 485
LR9128 28 514
LR9130 30 543
LR9132 32 572
LR9134 34 601
LR9136 36 630
LR9138 38 659
LR9140 40 688
Lr9142 42 717

 

 

3/4”

Diameter – Minimum Tensile Strength 20,050 lbs

Catalog number Bolt
Length (in)
Weight/100 (lbs)
LR8883 10 163
LR8882 12 196
LR8884 14 220
LR8886 16 240
LR8888 18 260
LR8890 20 284
LR8892 22 304
LR8894 24 336
LR8896 26 345
LR8897 28 365
LR8898 30 386
LR8899 32 400
LR9003 34 420
LR9004 36 460

 

Product Advantages

 

  • 1. Good reliability: When the stud is connected, there is no need to add accessories such as matching pins, which can greatly improve the reliability of the connection.
  • 2. Strong rigidity: When the stud is connected, the components are tight and can provide a good fixing effect.
  • 3. Easy installation: the double bolt is more convenient than the traditional single bolt due to the increase in the number of thread heads.
  • 4. Anti-loosening effect: When the two thread heads of the stud are connected, the docking parts can be more stable, so as to avoid loosening.
Double Arming Bolts

Application Places

INFRASTRUCTURE AND UTILITIES

  • Electrical Pole Lines: The electrical industry heavily relies on double arming bolts for assembling crossarms to poles in overhead lines. It contributes to the stability of structures that help transport electricity.
  • Telecommunication Lines: The telecommunication industry uses these bolts for the installation of equipment on telecommunication poles.

CONSTRUCTION

  • General Construction: Double arming bolts are often used in general construction projects, from buildings to bridges, for their versatile joint-securing abilities.
  • Hanging Equipment: Its specialized design is ideal for hanging equipment at a balanced level.

Packing

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Faq

  • 1. How to choose the right bolt for your needs?

    When selecting a bolt for a particular application, several key factors can influence the choice:

    • Material Compatibility: Certain bolts may be more suited to specific material types. A double arming bolt, for example, is excellent for securing metal connections.
    • Load-Bearing Requirements: Different bolt types can handle different weights and loads. It’s crucial to select a bolt with the required load-bearing capacity for your project.
    • Environment Exposure: Bolts can be made from various materials, like galvanized steel, which can resist corrosive environments.
  • 2. How to install a double arming bolt?

    To install a double arming bolt, follow these streamlined steps:

    1. Gather Tools and Materials: Assemble all required tools, such as a drill if you need to create holes in the poles, and the necessary fasteners.
    2. Select the Correct Bolt Size: Ensure you have a double arming bolt that matches the specifications for your application.
    3. Prepare the Bolt: Begin by separating the nuts and washers from the bolt, if they are pre-assembled.
    4. Align the Bolt: Insert the chamfered ends of the double arming bolt into the pre-drilled holes in the pole, pushing it through until it emerges on the other side.
    5. Attach Additional Hardware: Place any additional pole line hardware that needs to be secured with the double arming bolt.
    6. Secure with Washers and Nuts: Place washers on the bolt’s shaft, followed by the nuts. Tighten the nuts to secure everything in place.
    7. Final Check: Once the nuts are tightened, double-check the installation to ensure the bolt and all attached hardware are secure and properly aligned.
  • 3. What is the use of double arming bolts?

    Double arming bolts are used for cross arm and pole line construction purposes.

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