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Introduction to Hot-Dip Galvanized Pins and Inspection Standards
Hot-dip galvanized pins are typically used to secure or position components. They generally come in two forms: cylindrical and conical. There are also two common installation methods: press‑fitting and driving in with a soft‑metal hammer. These pins are often tapered, featuring pointed tips, and are employed to fasten or affix materials such as wooden boards, tiles, shoe soles, uppers, furniture molds, and various parts, or to repair holes.
2020-12-18
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The role of hot-dip galvanized flat washers in bolted joints
When bolts need to be frequently removed and reinstalled, a hot-dip galvanized flat washer is typically placed under the nut or bolt head to prevent scratching of the mating surfaces.
In certain applications where a more precise coefficient of friction is required—such as high-strength preloaded bolts—a hot-dip galvanized flat washer must be used on the nut side. In such cases, the bolt, nut, and washer should all be supplied by the same manufacturer. The bolt manufacturer is responsible for appropriately treating the nut and washer to ensure that the friction coefficient between them remains consistent.
2020-12-21
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Selection Criteria for Hot-Dip Galvanized Flat Washers
The primary function of a hot-dip galvanized flat washer is to reduce the surface pressure exerted on the fastened component by increasing the bearing area of the screw head. This is because, when the surface pressure exceeds the material’s capacity, the bearing surface may deform or collapse, leading to loosening of the fastener. Consequently, particularly when fastening through elongated holes, if the contact area between the screw head and the workpiece is small—especially for soft materials such as aluminum or resin—the use of a hot-dip galvanized flat washer can help mitigate surface pressure to some extent.
2020-12-24
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Factors Affecting the Price of Hot-Dip Galvanized Bolts
The price of hot-dip galvanized bolts is influenced by the following factors:
1. Supplier costs. Manufacturing costs are the fundamental, direct determinant of hot-dip galvanized bolt prices. These costs encompass material expenses, labor costs, production overhead, indirect expenses, administrative expenses, profit margins, and taxes. A supplier’s manufacturing cost sets the lower limit for pricing.
2. Specifications and quality. The higher the requirements for specifications and quality, the higher the price.
3. Supply‑and‑demand dynamics. When supply exceeds demand, buyers can secure favorable pricing; conversely, when demand outstrips supply, suppliers hold the upper hand, and hot-dip galvanized bolt prices tend to be higher than usual.
2020-12-28
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Classification of Hot-Dip Galvanized Spring Washers
Hot-dip galvanized spring washers are commonly referred to as spring washers in the fastener industry. They are manufactured from stainless steel and carbon steel, with carbon steel being a type of iron. Standard sizes for spring washers typically include M3, M4, M5, M6, M14, and M16; these specifications are most widely used. The national standard GB/T 94.1‑87 specifies standard spring washers in sizes ranging from 2 to 48 mm, in accordance with GB/T 94.4‑85, “Technical Requirements for Elastic Washers and Spring Washers.”
2021-01-12
NEW
What are the installation precautions for U-bolts?
U-bolts, also known as riding bolts, are non-standard fasteners so named for their U-shaped design. Both ends are threaded and can be paired with nuts. They are primarily used to secure tubular or sheet-like components, such as water pipes. Because their method of fastening resembles a rider mounted on a horse, they are commonly referred to as “riding bolts.” U-bolts have a wide range of applications, including construction and installation, mechanical assembly, and the automotive, marine, bridge, tunnel, and railway industries.
2021-01-21
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Technical Standards and Precautions for U-Bolts
I. Technical Standards for U‑Bolts
The general technical requirements for U‑bolts shall comply with GB 23148‑85, “General Technical Conditions for Electrical Accessories.” According to GB 70079‑88, “Technical Conditions for Ordinary Carbon Structural Steel,” the tensile strength shall not be less than 372.5 N/mm² (372.5 MPa). The threaded parts and components of U‑bolts must not exhibit any shrinkage, and the allowable load of a U‑bolt shall not exceed the specified value. U‑bolts are non‑standard fasteners; they are named as such due to their U‑shaped configuration and are primarily used to secure tubular objects such as water pipes or plate‑type components like automotive leaf springs. Because the objects they secure and…
2021-02-02
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Specifications and Types of Hot-Dip Galvanized Bolts
Hot-dip galvanized bolts, also known as hot‑dip zinc‑coated bolts, are produced by first degreasing and derusting the bolt to obtain a clean, well‑wetted surface, then immediately immersing it in a bath of molten zinc that has been preheated. This process forms a zinc coating on the bolt’s surface. The coating is relatively thick—typically 30 to 60 micrometers—and exhibits excellent corrosion resistance. It is ideally suited for long‑term rust protection of steel components exposed to outdoor conditions, such as highway guardrails, power transmission towers, and large‑size fasteners—items that tend to be relatively “rough” in texture. Owing to their high strength and superior corrosion resistance, hot‑dip galvanized bolts have increasingly become the material of choice for power transmission towers, communication towers, and highway infrastructure.
2021-03-30
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What are the main advantages of hot-dip galvanized bolts?
Hot-dip galvanizing is a manufacturing process used to enhance the corrosion resistance of bolts. “Hot-dip galvanized bolt” is a general term that refers to bolts with a hot-dip galvanized surface finish—such as tower bolts, drilled‑thread bolts, flange bolts, and guardrail bolts. Any bolt that has undergone hot-dip galvanizing can be collectively referred to as a hot-dip galvanized bolt.
2021-04-13
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Factors Affecting the Price of Hot-Dip Galvanized Bolts
Hot-dip galvanized bolts, also known as hot‑dip zinc‑coated bolts, are bolts that have undergone a hot‑dip galvanizing process, giving them excellent corrosion resistance. The zinc coating on these bolts is relatively thick—typically 30 to 60 micrometers—providing superior protection against rust. They are well suited for outdoor steel components, such as highway guardrails, power transmission towers, and large‑size fasteners, offering long‑term corrosion protection for more “rough” or heavily exposed parts. Thanks to their high strength and outstanding corrosion resistance, hot‑dip galvanized bolts are increasingly used in power transmission towers, communication towers, and highway guardrail systems.
2021-04-29
Jingjiang Yongyou Standard Parts Co., Ltd.
Phone:0523-84230633
Email:13601476128@163.com
Contact:13601476128(Gao Yongjun)
Fax: 0523-84231200
Address: No. 5, Jiangping Road, Xilai Town, Jingjiang City, Jiangsu Province
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