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This section provides an overview for double threaded bolts as well as their applications and principles. Also, please take a look at the list of 10 double threaded bolt manufacturers and their company rankings. Here are the top-ranked double threaded bolt companies as of December, 2024: 1.NIKO STEEL AND ENGINEERING LLP, 2.Tuna Vida, 3.Raaj Sagar Steels.
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In the event of an earthquake or typhoon, the columns of a post-and-beam wooden frame building may fall out of the foundation or beams, and to prevent this, reinforcement hardware called hold-down hardware is used. Hold-down hardware is attached to both the lower part of the column, the column foot, and the upper part, the column head.
Double threaded bolts, which are threaded on both sides, are used to tighten and secure the hold-down hardware attached to the columns above and below the beams and other structural members from the top and bottom of the structural members.
The importance of hold-down hardware was reaffirmed during the Hanshin-Awaji earthquake, when there was almost no damage to houses with such hardware installed. The subsequent laws made it mandatory to install hold-down hardware regardless of the number of floors in a building.
However, after the experiences of the East Japan earthquake and the Kumamoto earthquake, both of which were much larger in scale, there is a possibility that earthquake resistance standards will become even stricter in the future, and building materials such as hold-down hardware and double threaded bolts will be utilized more frequently.
Commercially available double threaded bolts have thread sizes of M12 and M16. In wood-frame construction, seismic forces transmitted from the ground to the vertical framing of beams and columns, and to the horizontal framing of the horizontal framing of the horizontal framing are much greater in the vertical framing. For this reason, M16 size Double threaded bolts should be used in the vertical direction to attach the hold-down hardware. On the other hand, M12 size bolts are used when connecting the transverse framing members laterally across the columns with fittings other than hold-down hardware.
The lengths of commercially available double threaded bolts range from 180mm to 600mm for M12 size and from 300mm to 1,100mm for M16 size, depending on the manufacturer.
Double threaded bolts are made of carbon steel conforming to a strength class and are chromated or zinc plated on the surface.
*Including some distributors, etc.
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Aetna Screw Products Co., founded in 1963, and based in Chicago, IL, is a manufacturer and supplier of spherical bearing products and industrial fasteners. The company specializes in spherical rod ends, ball joints, wheel bolts, tailored fasteners, and linkage products. Expanding to Mexico, China, and Europe, it's now a key partner for major distributors and OEMs. It provides various U.S.A.-made wheel and hub assembly fasteners for automotive, heavy truck, and agricultural equipment industries. The company offers logistics management services and streamlines supply chains with JIT & DFT solutions, ensuring products reach the assembly line in "AIAG" bar-coded bins.
U-BOLT-IT, INC. is a manufacturer and distributor of fasteners and lifting hardware founded in 1988 and based in Houston, Texas. The company offers various standard and custom bolts, nuts, screws, and cables. These include eye and U bolts, hex nuts, cable assemblies, and button socket head screws in a wide range of materials and coatings/finishes. U-Bolt-It products are primarily used by clients in the industrial manufacturing, marine, consumer goods, and off-shore sectors.
Shenzhen Shi Shi Tong Metal Products Co. Ltd. is a manufacturer of non-standard screws and fasteners established in 2009 and headquartered in Guangdong, China. The company offers a range of screws, including stainless steel, titanium, iron, multi-stroke, and die screws. It also offers special-shaped screws, long screws, non-standard fasteners, and supporting hardware. The company provides custom-made special screws to meet customer specifications. It is ISO 9001:2015 certified, serving various industries, including aerospace, automotive, electronics, and medical devices.
Strong Johnny International Co. Ltd. is a manufacturer and exporter of fasteners and custom OEM products, established in 1992 and headquartered in Kaohsiung, Taiwan. The company mainly produces a wide range of screws, nuts, and bolts, which are manufactured from different types of materials such as carbon steel, stainless steel, alloy steel, brass, and aluminum. It also specializes in customizing OEM products. The company is ISO 9001:2015 certified and serves various industries, including construction, automotive and motorcycles, engineering, and electronics. It exports to various regions, such as America, Europe, Southeast Asia, and the Middle East.
Aashish Steels, established in 2015 and based in Mumbai, India, is a manufacturer and supplier of steel works. Its main activities include designing, engineering, and construction of steel works such as staircases & handrails, roofing structures, gratings, and more. The company owns a production facility with land area of 15,000 square feet in Singapore. Aashish Steel also manufactures, supplies and exports nuts, steel bolts, washers, and screws in India and around the world.
Raaj Sagar Steels is a manufacturer of nickel alloys and stainless steel products. The company was founded in 1978 and is headquartered in Mumbai, India. Raaj Sagar Steels is primarily involved in the design, development, and manufacture of nickel alloys, including Inconel, Monel, and Hastelloy. The company also offers a wide range of stainless steel products, including bars, plates, and tubes. Raaj Sagar Steels' products are used by a wide range of customers, including the chemical, oil and gas, and power industries.
Ranking as of December 2024
Derivation Method| Rank | Company | Click Share |
|---|---|---|
| 1 | NIKO STEEL AND ENGINEERING LLP |
17.4%
|
| 2 | Tuna Vida |
17.4%
|
| 3 | Raaj Sagar Steels |
13.0%
|
| 4 | Aetna Screw Products Co. |
13.0%
|
| 5 | Aashish Steel |
13.0%
|
| 6 | 3 Legged Thing Ltd |
8.7%
|
| 7 | Metro Shelving |
8.7%
|
| 8 | Strong Johnny International Co., Ltd. |
8.7%
|
Derivation Method
The ranking is calculated based on the click share within the double threaded bolt page as of December 2024. Click share is defined as the total number of clicks for all companies during the period divided by the number of clicks for each company.Number of Employees
Newly Established Company
Company with a History
*Including some distributors, etc.
*Including some distributors, etc.
| Country | Number of Companies | Share (%) |
|---|---|---|
|
United States of America
|
2 | 25.0% |
|
India
|
2 | 25.0% |
|
China
|
1 | 12.5% |
|
Taiwan
|
1 | 12.5% |
Turkey
|
1 | 12.5% |
United Kingdom
|
1 | 12.5% |
15 products found
15 products
Mori Steel Co., Ltd.
680+ people viewing
Last viewed: 17 hours ago
Fast Response
■JIS standard anchor bolt ・JIS B 1220 structural double screw anchor bolt set. ・We manufacture all JIS standard sizes for SNR400B and SNR490B mat...
3 models listed
Mori Steel Co., Ltd.
380+ people viewing
Last viewed: 17 hours ago
Fast Response
■JIS standard anchor bolt ・JIS B 1220 structural double screw anchor bolt set. ・We manufacture all JIS standard sizes for SNR400B and SNR490B mat...
3 models listed
MNS Co., Ltd.
50+ people viewing
Last viewed: 16 hours ago
■Product introduction 1. I want to standardize tightening work 2.I want to manage the tightening force 3. I don't know how tight it should be 4. Bo...
Wilco Co., Ltd.
310+ people viewing
Last viewed: 11 hours ago
Very Fast Response
■Features - A screw without a head, also known as a ``long screw,'' ``threaded bolt,'' ``threaded screw,'' or ``full screw.'' -Long screws do not r...
5 models listed
Daido Hunt Co., Ltd.
70+ people viewing
Last viewed: 1 day ago
Hoshimoto
10+ people viewing
Standard Response
■Features Straight type (flange type is also available) ■Notes ・We accept custom orders of various sizes (minimum LOT 5,000pcs or more) ・Sales u...
Hoshimoto
20+ people viewing
Last viewed: 9 hours ago
Standard Response
Available in various sizes.
