Screws

Screws are fastening elements used to connect various components by being screwed into a threaded hole located in one of the connected parts. They provide a reliable and often easily detachable connection, eliminating the need for additional elements such as nuts. Screws are commonly used in structures with limited space for fastening and in applications requiring precise positioning of components.

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Name	Diameter of the circumcircle, e (mm)	Fastener type	Head diameter, dk (mm)	Length, l (mm)	Radius, r (mm)	Size	Standard	Steel grade	Thread pitch, p (mm)	Weight 1 pc (kg)
Stainless steel socket head cap screw 1"-8UNC-2A x 3 1/2" ASME B18.3	0	Head socket cap screw	0	90	0	—	ASME B18.3	A193 Gr. B8 cL 2	0	0.47
Stainless steel socket head cap screw 1"-8UNC-2A x 3 1/2" ASME B18.3	0	Head socket cap screw	0	90	0	—	ASME B18.3	A193 Gr. B8 cL 1	0	0.47
Low head socket cap screw M27x90 DIN 6912	21.73	Low head socket cap screw	40	90	1	M27	DIN 6912	cl. 8.8	27	0.54
Low head socket cap screw M27x90 DIN 6912	21.73	Low head socket cap screw	40	90	1	M27	DIN 6912	cl. 8.8, zinc flake	27	0.54
Low head socket cap screw M27x90 DIN 6912	21.73	Low head socket cap screw	40	90	1	M27	DIN 6912	cl. 8.8, zinc plated	27	0.54
Low head socket cap screw M27x90 DIN 6912	21.73	Low head socket cap screw	40	90	1	M27	DIN 6912	cl. 10.9, zinc flake	27	0.54
Low head socket cap screw M27x90 DIN 6912	21.73	Low head socket cap screw	40	90	1	M27	DIN 6912	cl. 10.9	27	0.54
Socket head screw M6x50 EN ISO 4762	5.72	Head socket cap screw	9.78	50	0.25	M6	EN ISO 4762	cl. 10.9, zinc plated	1	0.01
Socket head screw M6x50 EN ISO 4762	5.72	Head socket cap screw	9.78	50	0.25	M6	EN ISO 4762	25crMo4 / 1.7218	1	0.01
Socket head screw M6x50 EN ISO 4762	5.72	Head socket cap screw	9.78	50	0.25	M6	EN ISO 4762	42crMo4 / 1.7225	1	0.01

Order screws for pipelines with delivery to the destination point. The catalog includes screws with internal hex drive, cylindrical head, and countersunk head manufactured according to ASME, DIN, and EN ISO standards. They are suitable for pipeline systems, equipment assembly, and flange installation. ASME screws are fastening elements with a threaded shank and head designed for precise and durable joining of components in industrial structures. They are widely used in pipeline systems, power generation equipment, and technological installations where reliability, tightness, and resistance to heavy loads are essential. Production utilizes corrosion-resistant alloys such as Incoloy, Hastelloy, and Alloy grades, as well as stainless steels certified according to international standards. This ensures long service life in aggressive environments and stable performance under high temperatures, pressure, and vibration.

ASME threaded and adjusting screws

ASME threaded screws are used to connect structural elements by screwing into prepared threaded holes. Their design allows easy installation and removal without damaging the connected components, which simplifies maintenance and repair of equipment.

ASME adjusting screws are applied where it is necessary to change the position of components without disassembling the assembly. They allow precise system adjustment, ensuring reliable fastening and stability even after repeated corrections.

Thanks to international standards ASME B18.6.3 and ASME B18.3, these products maintain dimensional accuracy, load resistance, and full compatibility with pipeline and mechanical assemblies.

ASME countersunk screws for pipelines

ASME countersunk screws feature a special head design that sits flush with the surface of the component. This creates a smooth and sealed joint without protruding elements, which is especially important in confined spaces and in systems with increased safety requirements.

These screws are widely used in:

- high-pressure pipeline assemblies,

- power generation equipment,

- oil and gas and chemical installations.

Their use minimizes the risk of snagging, improves sealing performance, and protects the joint from vibration and aggressive environmental factors.

FAQ

1. What is the advantage of screws with an internal hex drive?

This head type allows tighter and more secure fastening, reducing the risk of tool slippage and damage to the screw.

2. What is the advantage of flange screws?

The flange increases the bearing surface under the screw head, improving load distribution and reducing the risk of damage to connected components.

3. How often should fasteners be adjusted in systems with high vibration?

This depends on the design, but adjusting screws help maintain connection stability during regular technical inspections.

4. What are the installation considerations for countersunk screws in limited-access areas?

Precise tools and torque control are required to ensure proper seating of the screw head without damaging the component.

Comments

1. Does the screw head shape affect resistance to rotation during tightening?

Yes. Head shape determines torque transfer and tool contact. Countersunk and round heads are generally less resistant to slipping compared with hex or cylindrical heads under similar conditions.

2. Are threaded screws suitable for joining parts made from different metals?

Yes, but galvanic corrosion must be considered. When joining dissimilar metals, protective coatings or insulating washers are recommended.

3. Which screws are preferable for assembling pipe supports—flanged or standard?

Flanged screws are usually preferred because they increase the clamping surface and reduce the risk of damage to support elements while ensuring more even load distribution.

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