Adjustable Knob Screw

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Double-headed cold-forged 304 stainless steel hexagon socket adjustment bolt riveted screw adjustment screw (adjustable knob screw) is a composite fastener that combines multiple processes, materials and functional characteristics. As a fastener manufacturer focusing on double-headed cold-forged 304 stainless steel hexagon socket adjustment bolts, we provide high-strength, corrosion-resistant fastening solutions for global industrial customers through advanced cold-forging technology.

1. Product Overview

The main body of the double-headed cold-forged adjustment bolt is formed by cold-forging 304 stainless steel, and the hexagon socket hole structure is designed at both ends. It is suitable for scenes such as mechanical positioning, equipment assembly, and riveting of automotive parts, especially for scenes such as marine equipment and chemical equipment that need to operate in a highly corrosive environment and high-frequency adjustment production.

Product Picture

 

2. Process advantages

Performance upgrade: The cold-forging process allows the metal fiber to be completely retained, and the tensile strength is increased by 10%-20% compared to the cutting process. 304 stainless steel is hardened by cold work, and the surface hardness reaches HRB85 or above, and the wear resistance life can be extended by 30%.

Efficiency and cost: The multi-station cold heading machine is formed in one step, and the production efficiency is 25-30 times higher than that of traditional cutting. The material utilization rate is more than 95%, which is almost zero cutting, especially since the cutting process is only 40%, which significantly reduces the manufacturing cost of a single piece.

III. Core product features

Material characteristics: Made of 304 stainless steel, it contains 18% chromium + 8% nickel. It has passed the 96-hour salt spray test, and its corrosion resistance far exceeds that of carbon steel objects. It is suitable for clean scenes such as food machinery and medical equipment.

Raw Material

Cold Forging

Threading

Auto Lathe

Auto Lathe

Table Lathe

CNC Lathe

Quality Checking

Inspection

Packing

Double-head hexagonal structure: The double-threaded end design supports flexible length adjustment, one end fixes the connector, and the other end locks the main body. The hexagonal hole can provide 6 force-bearing surfaces, which increases the torsional strength by 50%, and supports countersunk installation to keep the surface flat.

Cold heading precision forming: It adopts 5-6-station high-speed cold heading machine for one-piece forming, eliminating weld weaknesses and increasing fatigue strength by 15%.

4. Customization capability: meet the needs of segmented scenarios

We provide deep, flexible production services to ensure accurate matching of customer applications:

Size customization: support screw diameter and length, thread specifications are available in metric and imperial for free adaptation.

Structural optimization: support non-standard head type, special-shaped stepped shaft, anti-vibration, and anti-loose grain customization

Surface treatment: can add passivation, electrolytic polishing, or special coating.

Clipers Micrometer

Torque

Depth Micrometer

Plug

Thread Guage

Ring Guage

Hardness Tester

Projector

Salt Spray Testing

Batch delivery: 50,000 pieces minimum order, 15-day delivery cycle, supports global logistics.

5. Typical application areas

Machinery manufacturing: used as equipment leveling bolts, conveyor belt tensioning riveting screws

Building bridges: plays the role of earthquake-resistant bracket adjustment screws and steel structure connectors

New energy equipment: boththe  photovoltaic bracket angle adjuster and the wind power bolt

High-end furniture: as a hidden hexagon socket assembly screw, it can take into account both beauty and load-bearing

Why choose us?

Zeyao Hardware has been deeply involved in the fastener industry for more than 16 years and has profound experience in fastener manufacturing. Whether you need quick payment of standard parts of adjustable knob screws or customization for special working conditions, we can provide technical drawing review and working condition adaptation suggestions to make each screw a reliable gene of the equipment.