High-Strength Heavy Duty Alloy Steel Extended T-Screws

Product introduction

The extended T-shaped screw is a specially designed screw with a special shape and is a high-performance variant of the non-standard screw category. Its core feature is a significantly increased shank or thread length compared to standard T-screws, specifically designed to meet the clamping needs of deep grooves, multi-layer structures or extra-thick workpieces. This type of fastener screw retains the advantages of rapid positioning of standard T-heads, while greatly expanding the scope of application through the extended design. It is an indispensable connection solution in heavy industrial equipment, large molds and complex tooling systems. Its design stems from the in-depth expansion of the functions of standard T-shaped screws, aiming to solve the installation problems of traditional fasteners under special depth conditions.

 

Product design and features

Extra long shaft design: This is the most notable feature. The length of the rod can be customized according to customer needs and far exceeds the standard length on the market, allowing it to penetrate very thick workpieces or be used at the bottom of deep T-slots.

Enhanced load-bearing structure: In response to the bending stress that long rods may bring, high-end Extended T-Screws will use thicker rod diameters or higher-strength materials to ensure stiffness and fatigue resistance under long cantilever conditions. This reinforcement of basic fastener screws is the essence of non-standard screw design.

Anti-loosening and high pre-tightening force: The long thread provides more engagement turns, and when combined with high-performance nuts (such as flange nuts, nylon lock nuts), it can achieve a more reliable and long-lasting anti-loosening effect and a higher total pre-tightening force.

Multifunctional variants: In addition to the fully threaded type, there are also slender smooth rod types (used for positioning or guiding), stepped rod types (different sections with different diameters), etc., which are typical representatives of special-shaped screws to meet special assembly needs in precision equipment.

 

Materials and application fields

High-strength alloy steel, ultra-high strength (up to grade 12.9 and above), good toughness, typical application scenarios: large die-casting mold locking, heavy-duty stamping machine tool fixtures, wind power equipment tooling.

Corrosion-resistant stainless steel, excellent corrosion resistance, 17-4PH with high strength, typical application scenarios: chemical reactor internal fixtures, offshore platform equipment, food processing production lines.

Lightweight titanium alloy, high specific strength, excellent corrosion resistance and fatigue resistance, typical application scenarios: aerospace ground maintenance tooling, high-end racing fixtures, medical equipment brackets.

Special high-temperature alloys maintain high strength and oxidation resistance at high temperatures (above 650°C). Typical application scenarios: aircraft engine test bench fixtures, heat treatment furnace tooling, and nuclear power equipment maintenance.

 

Quality control and certification system

For long T-shaped screws, such critical non-standard screws, quality control goes far beyond final inspection, but is a system throughout.

Design and material certification: Finite element analysis (FEA): simulate and analyze the stress and strain of the ultra-long rod under complex loads to optimize the design. Material traceability: Require raw material suppliers to provide a complete material certificate (MTC) to ensure that the chemical composition and initial mechanical properties are up to standard.

Certification system: Industry standards: Following quality management systems such as ISO 9001, the aviation field may require AS9100.

Special Certifications: Products used in specific industries (e.g. nuclear power, marine) may require additional industry licensing certifications.

 

Customized service process

Customizing an Extended T-Screws is a typical non-standard screw cooperation project with a rigorous process:

In-depth docking of requirements: Customers provide detailed working condition diagrams (workpiece thickness, groove size, load type), material requirements, performance indicators (such as the minimum required clamping force) and environmental conditions (temperature, medium).

Engineering analysis and quotation: Engineers conduct mechanical calculations, confirm key dimensions (such as minimum rod diameter, thread length), evaluate processing feasibility, and provide technical solutions and quotations.

Prototype sample production and testing: Produce a small number of samples for customers to install and test to verify functionality and reliability.

Mass production and process monitoring: Mass production is carried out according to the confirmed sample standards, and inspection reports of key processes (such as heat treatment) are provided to customers.

Delivery and after-sales support: Provide a complete product technical information package, including material reports, performance test reports, etc.

 

FAQ

Q: Is there an upper limit on the length of Extended T-Screws? How to ensure the straightness of extra long screws?

A: In theory, it can be customized according to needs, but in practice, it is limited by material specifications and processing equipment. Usually the length of a single piece can be up to 1 meter or even longer. Ensuring straightness is a key process: first, use high-straightness raw materials; secondly, use special auxiliary tools during thread processing and heat treatment to prevent bending; finally, the finished product will be specially tested for straightness using an optical projector or precision platform to ensure that it can meet the requirements of precision assembly as a special-shaped screw.

 

Q: Why is the delivery time of customized Extended T-Screws usually much longer than that of standard parts?

A: Because it is a deeply customized non-standard screw, the cycle includes: 1. Special procurement of raw materials: extra-long or special alloy materials need to be customized from the steel factory. 2. Complex process preparation: special molds, fixtures and inspection tools need to be designed and manufactured. 3. Strict inspection and testing: Various performance tests, especially mechanical property tests after heat treatment, take time. 4. Possible multiple rounds of commissioning: especially when completely new sizes or materials are involved.

 

Q: How to prevent the extended T-shaped screw from loosening in an environment with strong vibration?

A: In addition to using standard locking nuts, the following special measures can also be taken: 1. Thread coating: Apply high-performance (such as anaerobic) thread locking agent to the threads. 2. Mechanical locking: Process a transverse hole at the end of the screw and install a cotter pin or use a castle nut with a cotter pin. 3. Special anti-loosening design: Customized washer face nut with integral locking flange or upturned tooth pattern. These solutions can be integrated when customizing fastener screws.

High-Strength Alloy Steel Standard T-Screws

Rust-Resistant 304 Or 316 Stainless Steel T-Screws

High-Precision Carbon Steel Zinc Plated Partially Threaded T-Screws

Precision Fully Threaded Carbon Double Head Screws Fasteners

Stainless Steel Combination Drive Screws Fasteners

Corrosion Resistant Stainless Steel Torx Tamper-Proof Screws