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Your Professional External Hex Bolts Manufacturer

Wuxi Lemar Metal Products Co., Ltd. is a professional fastener system service group integrating scientific research, manufacturing, sales and logistics. It follows the business philosophy of "striving for excellence and adhering to integrity" and has established a good image in the field of fastener manufacturing and sales. It has established long-term cooperative relationships with major well-known logistics brands at home and abroad to ensure that products are delivered to customers at the fastest speed and are well received by users.

Class 10.9 Hex Flange Bolt
NO.:LM-1526. Standard:DIN 6921. Grade:10.9. Material:Carbon steel/Stainless steel
Stainless Steel Hex Flange Bolt
NO.:LM-1525. Type:Hex Flange Screws. Standard:DIN 6921. Material:Carbon steel/Stainless steel
Zinc Plated Hex Flange Bolt
No：LM-1524. Surface treatment:Colored zinc plating. Standard:DIN 6921. Material:Carbon steel/Stainless steel
DIN 6921 Hexagon Flange Bolt
No：LM-1523. Standard:DIN 6921. Material:Carbon steel/Stainless steel. Type:Flange External Hex bolt
Bolt Hex HD M16
No.:LM-1500. Type:Full Thread Hexagon Bolts. Size:M16*190mm. Material:Stainless steel or Galvanized.
Replacement Blade Bolts
No: LM-1187. Material: Carbon steel. Surface treatment: Colored zinc plating. Standard: DIN 6921
304 Stainless Steel External Hexagonal Screws
Material: 316/304 Stainless steel. Standard:DIN933/ISO4017. Type: External hexagonal screw. Specification:M3-M30.
DIN931 Hexagonal Bolts
Standard number: MS 9525-1986. Material: 304 stainless steel. Strength grade: 4.8/5.6/8.8/10.9Grade. Bolt head type: Half thread external hexagonal bolt.
304 Stainless Steel Hex Screws
M3M4M5M6M8M10 Hexagon bolts with washers. Hexagonal cross bolt. Material:304 stainless steel. Bolts set with flat spring pad. 304 External Hexagon Screws. Fully Threaded Hex bolts. Bolt head

Why Choose Us

Technical team support
Possess full process manufacturing capabilities and experimental research and development capabilities for fasteners. With strong technical strength and 3D marketing network, it has more than 100,000 enterprise-level users and serves 57 industries.

Production Equipment
Our company has cold heading machines, thread rolling machines, wire drawing machines, thread rolling machines, tapping machines, vibration plate automatic assembly and other processing and feeding equipment.

Sales Market
Lemar Assisting scientific research enterprises,exported to Europe,North America, Africa, Central Asia, Middle East.

External Hex Bolts - Overview

External hex bolts, also known as hex cap screws or hexagon head bolts, are a type of fastener with a hexagonal-shaped head and an external threaded shaft. These bolts are designed to be used with a corresponding nut or a tapped hole to create a secure and tight connection.

Product Specificatin

We provide the following product specifications：

Item model number: ‎	External Hex Bolts
Thread Size:	1/2-20 (0.500")
Length:	2-1/2"
Head Style:	Hex
Head Width:	3/4"
Head Height:	11/32"
Drive Style:	External Hex
Drive Size:	3/4"
Package Dimensions: ‎	6 x 4 x 0.65 inches; 13.93 ounces

Advantages of External Hex Bolts

High Strength and Load Capacity

External hex bolts are designed to handle significant tensile and shear forces, making them ideal for heavy-duty and structural applications. Their robust design allows them to resist deformation and breakage under high stress, ensuring reliable performance.

Versatility

They come in various sizes and materials, including stainless steel and galvanized options for corrosion resistance, making them suitable for diverse environments and applications. This versatility allows them to be used in both high and low-load applications, from construction and automotive to general mechanical tasks.

Ease of Installation

The hexagonal head provides a good surface for tools like wrenches, allowing for easy and efficient tightening and loosening. This ease of installation is especially beneficial when dealing with a large number of bolts.

Good Self-Locking Properties

External hex bolts can offer good self-locking characteristics, enhancing their ability to maintain a secure connection, particularly in situations with vibration or alternating loads. The larger contact area of the hex head also contributes to a stronger and more reliable pre-tightened connection.

Materials for External Hex Bolts

Stainless steel bolts

Common choice of hex screws since they don't need any coating and are corrosion resistant.

Carbon steel bolts

The most common hexagon screw head bolts are zinc plated for added corrosion resistance.

Alloy steel bolts

These types of hex bolts are made to withstand an enormous amount of pounds per square inch. They are coat

Application

Building Construction:

Steel Structure Connections - Core structural elements. Used for joining primary and secondary steel beams and columns in bridges, factories, and high-rises, withstanding immense tensile and shear forces. High-strength bolts (e.g., Grade 8.8, 10.9) with corrosion protection like hot-dip galvanizing are standard.

Automotive Manufacturing

Engine and Chassis Critical Connections - Securing engine blocks, transmissions, suspension systems, subframes, and wheel hubs. These connections require bolts capable of enduring extreme shock, vibration, and high temperatures, necessitating material strength ≥ Grade 8.8 with corrosion protection coatings such as Dacromet.

Machinery & Equipment

Assembly of Industrial Machinery - Essential for fixing housings, bases, bearing housings, and flanged connections in machine tools, gearboxes, pumps, valves, and transmission systems. Bolt selection varies based on application-specific load requirements, emphasizing reliability and maintenance accessibility.

Furniture Manufacturing

Load-Bearing Joints & Fixtures - Applied in assembling wooden/panel furniture structures (e.g., table leg-to-top joints, bed frame reinforcement), mounting fixtures (towel racks, shelves), and securing appliances (washing machines). Typically uses Grade 4.8 partially threaded bolts with washers or flanges, balancing corrosion resistance (zinc plating/black oxide) with aesthetics.

Customization Process

Requirement Discussion

Design Proposal

Our professional team will develop a design proposal and provide a quotation based on your requirements.

Sample Production

We produce samples according to the design proposal and conduct rigorous testing.

Mass Production

Upon your approval, we commence mass production to ensure timely delivery and consistent quality.

After-Sales Service

We offer ongoing technical support and service to ensure the long-term stable operation of our products.

Other Services

Surface treatment: Plain, Galvanized, Hot Dip Galvanized, Black Oxide, Anodized, etc.
Excellent quality control system for fine dimensional accuracy.
Various materials are available as per your request
Conform to international standard.
We had got certificate of ISO9001: 2008, SGS & RoHS.
Prompt delivery.
Various sizes are available.
Material: Stainless Steel 18-8 18-10, Carbon steel Gr4.8 Gr8.8 Gr10.9, Gr12.9, Aluminum, Copper, etc.
Packing Stylet: General export packing
Can be made with different standards such as ISO, DIN, AS/NZS, GB, ANSI, BS and special standard.
Good customer service
OEM is available

Package & Delivery

Package:	Standard export package
Delivery:	By air express, by sea

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FAQ

Q: What are external hex screws used for?

A: External hexagon screws with common thread around the ring teeth have better self-pin performance, mainly used on thin-wall parts or under the impact, vibration, or alternating load. Generally, external hexagon screws are partially threaded.

Q: What is the best metal for bolts outside?

A: Stainless steel nails and screws have long-term protection against corrosion. There are two common types of stainless steel fasteners for outdoor use: stainless steel 304 and stainless steel 316. Stainless steel 304 fasteners are made from a combination of nickel and chromium. 304 fasteners are highly rust-resistant.

Q: What is the best coating for bolts outside?

A: Hot Dip Galvanizing
Also known as HD, this type of coating is ideal for fasteners that will be used outdoors. With its reliable corrosion resistance, it is particularly well-suited to coastal areas where there is greater exposure to salt.

Q: When to use exterior screws?

A: Common Projects Completed with Exterior Screws
These fasteners are a popular choice for most outdoor building projects that don't require structural strength. These fasteners are used in general outdoor construction applications like gazebos, fencing, lattice, decking, and more.

Q: Are you manufacturer or trading company?

A: We are manufacturer.

Q: What's your best delivery time?

A: Within 15-30 days.

Q: What is the quality control of your product?

A: Follow strictly quality control measures for implementation,

Q: Will your company provide free sample?

A: It depends on which sort of item you want to get. Some can be provided free of charge, however, the client shall assume the shipping fees himself.

Q: Is OEM open to clients?

A: Yes, we can provide both OEM and ODM service.

Q: How can our company be your distribution partner?

A: We welcome you to be our distributor. For further details, please contact us.

Q: What is the payment of sample?

A: T/T and Alipay both acceptable.

Q: What is your sample policy?

A: If we have stock, we can provide samples, but the customer must pay the sample fee and express fee Question.

Q: Have you tested all your goods before shipment?

A: Yes, we will conduct 100% test before delivery, and we will send detailed photos of parts for your approval Question.

We're well-known as one of the leading external hex bolts manufacturers and suppliers in China. If you're going to wholesale high quality external hex bolts made in China, welcome to get pricelist and free sample from our factory. Also, OEM service is available.

304 Stainless Steel Hex Screws, Replacement Blade Bolts, 304 Stainless Steel External Hexagonal Screws

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