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Standard Metric Screw Stud
  • Standard Metric Screw StudStandard Metric Screw Stud

Standard Metric Screw Stud

Suzhou Maitu offers a comprehensive range of China Standard Metric Screw Studs, available in various strength grades and with multiple surface treatment options. Suzhou Maitu has been specialized in the production, sales, and solution services of trapezoidal screws for 12 years. It is worth noting that, based on the long-term application data and feedback from our diverse customer base, the standard metric triangular screw stud is often successfully implemented in power transmission systems. Our studs are manufactured to precise international standards, providing dependable and consistent performance for your transmission and locking requirements.

The Standard Metric Screw Stud from Suzhou Maitu manufacturer represents a fundamental threaded component engineered for secure fastening and assembly in a vast range of mechanical applications. Characterized by its unified and internationally recognized metric dimensions, this stud features the classic 60° triangular thread profile standardized under the ISO metric system. This specific geometry is precision-engineered to create strong, reliable, and vibration-resistant connections between components.

A defining feature of the standard metric thread is its high efficiency in generating and maintaining clamping force. The sharp, symmetrical V-shaped profile allows for tight engagement with a matched nut or tapped hole, ensuring a secure fit that is critical for the structural integrity of assemblies from precision instruments to heavy machinery. This universal standardization guarantees interchangeability and simplifies the sourcing and maintenance processes across global supply chains.

However, the sharp crest and root of the standard triangular thread make it less ideal for applications involving frequent linear motion or high axial loads. Unlike the trapezoidal thread designed for power transmission, the primary function of the metric screw stud is static fastening. Its profile is optimized for high tensile strength but is more susceptible to wear and damage from repeated engagement or in dirty environments.

Thus, the Standard Metric Screw Stud’s application of appropriate surface treatments is crucial to enhance the stud's performance and longevity. For carbon steel studs, treatments such as zinc plating for corrosion resistance or black oxidation for a durable, non-reflective finish are common. These protective layers are engineered to prevent seizing during assembly and to provide stubborn resistance against rust and environmental degradation, ensuring the reliability of the fastened joint over time.


Standard Metric Screw Stud


Product Materials

Our Standard Metric Screw Studs are mainly manufactured with high-quality S45C carbon steel (the core material for static fastening scenarios), which is strictly selected through raw material inspection procedures. In addition to the commonly used carbon steel, we provide customized material options according to procurement needs: 304/316 stainless steel (for high-corrosion environments such as chemical equipment and marine machinery), alloy steel (for high-strength fastening requirements in heavy machinery), and special materials such as brass, bronze and PEEK (for precision electronic equipment and special working conditions). All materials meet international standards and have complete material inspection reports to ensure traceability.


Product Performance

① Clamping Performance: Adopting the standard 60° triangular thread profile, the product has high clamping force efficiency, can form a tight and vibration-resistant connection with matched nuts or tapped holes, and the tensile strength meets the corresponding grade requirements (consistent with the strength grades provided by the product).

② Wear Resistance: After professional surface treatment, the wear resistance of the thread surface is significantly improved, which solves the problem that the sharp crest and root of the standard triangular thread are easy to wear in harsh environments.

③ Corrosion Resistance: Zinc plating, black oxidation and other surface treatments can effectively resist rust and environmental degradation, and the corrosion resistance test meets industrial standards (e.g., zinc-plated products can pass the neutral salt spray test for more than 48 hours).

④ Dimensional Stability: The precision machining process ensures that the dimensional tolerance of each screw stud is strictly controlled within the ISO standard range, and the performance is stable in long-term use without deformation.


Product Process

① Raw Material Processing: The selected raw materials are subjected to precision cutting and tempering treatment to improve the toughness and tensile strength of the material.

② Thread Forming: Using advanced thread rolling machines, the 60° triangular thread is formed in one piece, which ensures the uniformity and precision of the thread profile, and avoids the defects of thread burr and uneven pitch caused by traditional cutting processes.

③ Precision Machining: High-precision CNC lathes are used for end machining to ensure the flatness and perpendicularity of the screw stud ends, which is convenient for assembly.

④ Surface Treatment: Adopt professional electroplating, hot-dip galvanizing or black oxidation processes, and strictly control the thickness and uniformity of the coating through pre-treatment (derusting, degreasing) and post-treatment (sealing) to ensure the adhesion and protective effect of the surface layer.

⑤ Quality Inspection: Each process is equipped with special QC personnel, and the finished products are inspected by thread gauges, micrometers and other professional equipment to ensure that each product meets the standard.



Standard Metric Screw Stud



Product Advantages

① High Compatibility: Fully compliant with ISO, DIN, ANSI international standards, the thread size is unified, which can be perfectly matched with metric nuts and tapped holes of other international brands, realizing global interchangeability and reducing procurement and maintenance costs for buyers.

② Customization Flexibility: In addition to the standard specifications in the parameter table, we can provide customized services according to the buyer's drawings and requirements, including non-standard thread size, length, material and surface treatment, to meet the personalized needs of different application scenarios.

③ Long Service Life: The combination of high-quality materials and professional surface treatment makes the product have excellent corrosion resistance and wear resistance, which extends the service life of the fastened joint and reduces the frequency of replacement.

④ Cost-Effective: Through optimized production processes and mature supply chains, we realize the balance of high quality and reasonable price. Bulk procurement can enjoy preferential prices, and free samples can be provided for performance testing, reducing the procurement risk of buyers.


Factory Advantages

① Professional Experience: Founded in 2014, with more than 12 years of professional experience in screw production, focusing on the R&D, production and sales of threaded components, and serving more than 5,000 domestic and foreign customers, with rich experience in solving various fastening and transmission problems.

② Advanced Equipment: Equipped with 10 production lines, including advanced thread rolling machines, high-precision CNC lathes and professional testing equipment, covering the entire production process, ensuring stable product quality and efficient production capacity (annual output of more than 80,000 pieces of overseas orders in the past 3 years).

③ Strict Quality Control: Certified by ISO 9001 quality management system, with a professional QC team of 6 people, implementing full-process quality control from raw material inspection to finished product delivery, and establishing an ERP system to track the production and quality process.

④ Perfect Service System: Provide one-stop service from pre-sales consultation (material and specification selection guidance), in-sales customization (drawing confirmation and sample production), to after-sales support (logistics optimization and maintenance guidance), and OEM services are available to meet the personalized needs of buyers.

Standard Metric Screw StudStandard Metric Screw Stud

Production Parameters

Basic Tolerance Allowance, Major Dia, d Pitch Dia, d2 and Functional Dia d1 d3
Thread class es
Designation Max. Min. Max. Min. Tol.
M1.6 x 0.35 6g 0.019 1.581 1.496 1.354 1.291 0.063 1.202 1.075
M1.6 x 0.35 6h 0 1.6 1.515 1.373 1.31 0.063 1.221 1.094
M1.6 x 0.35 4g6g 0.019 1.581 1.496 1.354 1.314 0.04 1.202 1.098
M2 x 0.4 6g 0.019 1.981 1.886 1.721 1.654 0.067 1.548 1.408
M2 x 0.4 6h 0 2 1.905 1.74 1.673 0.067 1.567 1.427
M2 x 0.4 4g6g 0.019 1.981 1.886 1.721 1.679 0.042 1.548 1.433
M2.5 x 0.45 6g 0.02 2.48 2.38 2.188 2.117 0.071 1.993 1.84
M2.5 x 0.45 6h 0 2.5 2.4 2.208 2.137 0.071 2.013 1.86
M2.5 x 0.45 4g6g 0.02 2.48 2.38 2.188 2.143 0.045 1.993 1.866
M3 x 0.5 6g 0.02 2.98 2.874 2.655 2.58 0.075 2.438 2.272
M3 x 0.5 6h 0 3 2.894 2.675 2.6 0.075 2.458 2.292
M3 x 0.5 4g6g 0.02 2.98 2.874 2.655 2.607 0.048 2.438 2.299
M3.5 x 0.6 6g 0.021 3.479 3.354 3.089 3.004 0.085 2.829 2.634
M3.5 x 0.6 6h 0 3.5 3.375 3.11 3.025 0.085 2.85 2.655
M3.5 x 0.6 4g6g 0.021 3.479 3.354 3.089 3.036 0.053 2.829 2.666
M4 x 0.7 6g 0.022 3.978 3.838 3.523 3.433 0.09 3.22 3.002
M4 x 0.7 6h 0 4 3.86 3.545 3.455 0.09 3.242 3.024
M4 x 0.7 4g6g 0.022 3.978 3.838 3.523 3.467 0.056 3.22 3.036
M5 x 0.8 6g 0.024 4.976 4.826 4.456 4.361 0.095 4.11 3.868
M5 x 0.8 6h 0 5 4.85 4.48 4.385 0.095 4.134 3.892
M5 x 0.8 4g6g 0.024 4.976 4.826 4.456 4.396 0.06 4.11 3.903
M6 x 1 6g 0.026 5.974 5.794 5.324 5.212 0.112 4.891 4.596
M6 x 1 6h 0 6 5.82 5.35 5.238 0.112 4.917 4.622
M6 x 1 4g6g 0.026 5.974 5.794 5.324 5.253 0.071 4.891 4.637
M8 x 1.25 6g 0.028 7.972 7.76 7.16 7.042 0.118 6.619 6.272
M8 x 1.25 6h 0 8 7.788 7.188 7.07 0.118 6.647 6.3
M8 x 1.25 4g6g 0.028 7.972 7.76 7.16 7.085 0.075 6.619 6.315
M8 x 1 6g 0.026 7.974 7.794 7.324 7.212 0.112 6.891 6.596
M8 x 1 6h 0 8 7.82 7.35 7.238 0.112 6.917 6.622
M8 x 1 4g6g 0.026 7.974 7.794 7.324 7.253 0.071 6.891 6.637
M10 x 1.5 6g 0.032 9.968 9.732 8.994 8.862 0.132 8.344 7.938
M10 x 1.5 6h 0 10 9.764 9.026 8.894 0.132 8.376 7.97
M10 x 1.5 4g6g 0.032 9.968 9.732 8.994 8.909 0.085 8.344 7.985
M10 x 1.25 6g 0.028 9.972 9.76 9.16 9.042 0.118 8.619 8.272
M10 x 1.25 6h 0 10 9.788 9.188 9.07 0.118 8.647 8.3
M10 x 1.25 4g6g 0.028 9.972 9.76 9.16 9.085 0.075 8.619 8.315
M10 x 1 6g 0.026 9.974 9.794 9.324 9.212 0.112 8.891 8.596
M10 x 1 6h 0 10 9.82 9.35 9.238 0.112 8.917 8.622
M10 x 1 4g6g 0.026 9.974 9.794 9.324 9.253 0.071 8.891 8.637
M10 x 0.75 6g 0.022 9.978 9.838 9.491 9.391 0.1 9.166 8.929
M10 x 0.75 6h 0 10 9.86 9.513 9.413 0.1 9.188 8.951
M10 x 0.75 4g6g 0.022 9.978 9.838 9.491 9.428 0.063 9.166 8.966
M12 x 1.75 6g 0.034 11.966 11.701 10.829 10.679 0.15 10.071 9.601
M12 x 1.75 6h 0 12 11.735 10.863 10.713 0.15 10.105 9.635
M12 x 1.75 4g6g 0.034 11.966 11.701 10.829 10.734 0.095 10.071 9.656
M12 x 1.5 6g 0.032 11.968 11.732 10.994 10.854 0.14 10.344 9.93
M12 x 1.5 6h 0 12 11.764 11.026 10.886 0.14 10.376 9.962
M12 x 1.5 4g6g 0.032 11.968 11.732 10.994 10.904 0.09 10.344 9.98
M12 x 1.25 6g 0.028 11.972 11.76 11.16 11.028 0.132 10.619 10.258
M12 x 1.25 6h 0 12 11.788 11.188 11.056 0.132 10.647 10.286
M12 x 1.25 4g6g 0.028 11.972 11.76 11.16 11.075 0.085 10.619 10.305
M12 x 1 6g 0.026 11.974 11.794 11.324 11.206 0.118 10.891 10.59
M12 x 1 6h 0 12 11.82 11.35 11.232 0.118 10.917 10.616
M12 x 1 4g6g 0.026 11.974 11.794 11.324 11.249 0.075 10.891 10.633
M14 x 2 6g 0.038 13.962 13.682 12.663 12.503 0.16 11.797 11.271
M14 x 2 6h 0 14 13.72 12.701 12.541 0.16 11.835 11.309
M14 x 2 4g6g 0.038 13.962 13.682 12.663 12.563 0.1 11.797 11.331
M14 x 1.5 6g 0.032 13.968 13.732 12.994 12.854 0.14 12.344 11.93
M14 x 1.5 6h 0 14 13.764 13.026 12.886 0.14 12.376 11.962
M14 x 1.5 4g6g 0.032 13.968 13.732 12.994 12.904 0.09 12.344 11.98
M15 x 1 6g 0.026 14.974 14.794 14.324 14.206 0.118 13.891 13.59
M15 x 1 6h 0 15 14.82 14.35 14.232 0.118 13.917 13.616
M15 x 1 4g6g 0.026 14.974 14.794 14.324 14.249 0.075 13.891 13.633
M16 x 2 6g 0.038 15.962 15.682 14.663 14.503 0.16 13.797 13.271
M16 x 2 6h 0 16 15.72 14.701 14.541 0.16 13.835 13.309
M16 x 1.5 4g6g 0.038 15.962 15.682 14.663 14.563 0.1 13.797 13.331
M16 x 1.5 6g 0.032 15.968 15.732 14.994 14.854 0.14 14.344 13.93
M16 x 1.5 6h 0 16 15.764 15.026 14.886 0.14 14.376 13.962
M17 x 1 4g6g 0.032 15.968 15.732 14.994 14.904 0.09 14.344 13.98
M17 x 1 6g 0.026 16.974 16.794 16.324 16.206 0.118 15.891 15.59
M17 x 1 6h 0 17 16.82 16.35 16.232 0.118 15.917 15.616
M18 x 1.5 4g6g 0.026 16.974 16.794 16.324 16.249 0.075 15.891 15.633
M18 x 1.5 6g 0.032 17.968 17.732 16.994 16.854 0.14 16.344 15.93
M18 x 1.5 6h 0 18 17.764 17.026 16.886 0.14 16.376 15.962
M20 x 2.5 4g6g 0.032 17.968 17.732 16.994 16.904 0.09 16.344 15.98
M20 x 2.5 6g 0.042 19.958 19.623 18.334 18.164 0.17 17.251 16.624
M20 x 2.5 6h 0 20 19.665 18.376 18.206 0.17 17.293 16.666
M20 x 1.5 4g6g 0.042 19.958 19.623 18.334 18.228 0.106 17.251 16.688
M20 x 1.5 6g 0.032 19.968 19.732 18.994 18.854 0.14 18.344 17.93
M20 x 1.5 6h 0 20 19.764 19.026 18.886 0.14 18.376 17.962
M20 x 1 4g6g 0.032 19.968 19.732 18.994 18.904 0.09 18.344 17.98
M20 x 1 6g 0.026 19.974 19.794 19.324 19.206 0.118 18.891 18.59
M20 x 1 6h 0 20 19.82 19.35 19.232 0.118 18.917 18.616
M22 x 2.5 4g6g 0.026 19.974 19.794 19.324 19.249 0.075 18.891 18.633
M22 x 2.5 6g 0.042 21.958 21.623 20.334 20.164 0.17 19.251 18.624
M22 x 1.5 6h 0 22 21.665 20.376 20.206 0.17 19.293 18.666
M22 x 1.5 6g 0.032 21.968 21.732 20.994 20.854 0.14 20.344 19.93
M22 x 1.5 6h 0 22 21.764 21.026 20.886 0.14 20.376 19.962
M24 x 3 4g6g 0.032 21.968 21.732 20.994 20.904 0.09 20.344 19.98
M24 x 3 6g 0.048 23.952 23.577 22.003 21.803 0.2 20.704 19.955
M24 x 3 6h 0 24 23.625 22.051 21.851 0.2 20.752 20.003
M24 x 2 4g6g 0.048 23.952 23.577 22.003 21.878 0.125 20.704 20.03
M24 x 2 6g 0.038 23.962 23.682 22.663 22.493 0.17 21.797 21.261
M24 x 2 6h 0 24 23.72 22.701 22.531 0.17 21.835 21.299
M24 x 2 4g6g 0.038 23.962 23.682 22.663 22.557 0.106 21.797 21.325
M25 x 1.5 6g 0.032 24.968 24.732 23.994 23.844 0.15 23.344 22.92
M25 x 1.5 6h 0 25 24.764 24.026 23.876 0.15 23.376 22.952
M25 x 1.5 4g6g 0.032 24.968 24.732 23.994 23.899 0.095 23.344 22.975
M27 x 3 6g 0.048 26.952 26.577 25.003 24.803 0.2 23.704 22.955
M27 x 3 6h 0 27 26.625 25.051 24.851 0.2 23.752 23.003
M27 x 2 6g 0.038 26.962 26.682 25.663 25.493 0.17 24.797 24.261
M27 x 2 6h 0 27 26.72 25.701 25.531 0.17 24.835 24.299
M27 x 2 4g6g 0.038 26.962 26.682 25.663 25.557 0.106 24.797 24.325
M30 x 3.5 6g 0.053 29.947 29.522 27.674 27.462 0.212 26.158 25.306
M30 x 3.5 6h 0 30 29.575 27.727 27.515 0.212 26.211 25.359
M30 x 3.5 4g6g 0.053 29.947 29.522 27.674 27.542 0.132 26.158 25.386
M30 x 2 6g 0.038 29.962 29.682 28.663 28.493 0.17 27.797 27.261
M30 x 2 6h 0 30 29.72 28.701 28.531 0.17 27.835 27.299
M30 x 2 4g6g 0.038 29.962 29.682 28.663 28.557 0.106 27.797 27.325
M30 x 1.5 6g 0.032 29.968 29.732 28.994 28.844 0.15 28.344 27.92
M30 x 1.5 6h 0 30 29.764 29.026 28.876 0.15 28.376 27.952
M30 x 1.5 4g6g 0.032 29.968 29.732 28.994 28.899 0.095 28.344 27.975
M33 x 2 6g 0.038 32.962 32.682 31.663 31.493 0.17 30.797 30.261
M33 x 2 6h 0 33 32.72 31.701 31.531 0.17 30.835 30.299
M33 x 2 4g6g 0.038 32.962 32.682 31.663 31.557 0.106 30.797 30.325
M35 x 1.5 6g 0.032 34.968 34.732 33.994 33.844 0.15 33.344 32.92
M35 x 1.5 6h 0 35 34.764 34.026 33.876 0.15 33.376 32.952
M36 x 4 6g 0.06 35.94 35.465 33.342 33.118 0.224 31.61 30.654
M36 x 4 6h 0 36 35.525 33.402 33.178 0.224 31.67 30.714
M36 x 4 4g6g 0.06 35.94 35.465 33.342 33.202 0.14 31.61 30.738
M36 x 2 6g 0.038 35.962 35.682 34.663 34.493 0.17 33.797 33.261
M36 x 2 6h 0 36 35.72 34.701 34.531 0.17 33.835 33.299
M36 x 2 4g6g 0.038 35.962 35.682 34.663 34.557 0.106 33.797 33.325
M39 x 2 6g 0.038 38.962 38.682 37.663 37.493 0.17 36.797 36.261
M39 x 2 6h 0 39 38.72 37.701 37.531 0.17 36.835 36.299
M39 x 2 4g6g 0.038 38.962 38.682 37.663 37.557 0.106 36.797 36.325
M40 x 1.5 6g 0.032 39.968 39.732 38.994 38.844 0.15 38.344 37.92
M40 x 1.5 6h 0 40 39.764 39.026 38.876 0.15 38.376 37.952
M40 x 1.5 4g6g 0.032 39.968 39.732 38.994 38.899 0.095 38.344 37.975



FAQs

1. Can you provide customized services?

Yes, we support full customization. You only need to provide the detailed drawings (including thread size, length, material, surface treatment and other requirements), our professional engineering team will confirm the feasibility and provide sample production services, and the bulk production will be carried out after the sample is confirmed by both parties.


2. Do you provide material inspection reports and product quality certificates?

Yes, all our products are accompanied by corresponding quality certificates, and we can provide material inspection reports (including material composition, tensile strength and other indicators) and surface treatment test reports (such as salt spray test reports) according to the buyer's requirements, which are all compliant with international standards.


3. What is the delivery time, especially for bulk orders and customized orders?

For standard specifications in stock, the delivery time is 3-5 working days; for bulk orders (more than 1000 pieces), the delivery time is 7-15 working days; for customized orders, the delivery time is 10-20 working days (depending on the complexity of customization), and we will optimize the production schedule to ensure on-time delivery.


4. How to solve the problem of product quality inconsistency or damage during transportation?

We have strict packaging standards (using anti-collision packaging materials) to avoid Standard Metric Screw Stud damage during transportation. If there is quality inconsistency or transportation damage, please provide relevant photos and test reports within 7 working days after receiving the goods, and we will verify it quickly and provide solutions such as replacement, rework or compensation free of charge.

Standard Metric Screw StudStandard Metric Screw Stud

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