Common Size Standards & International Specifications of Hopper Feed T Nuts
As automation and high-efficiency production become the norm across industries, Hopper Feed T Nuts—designed for automatic feeding systems—are widely used in furniture assembly, industrial fastening, and hardware manufacturing. For engineers and procurement specialists, understanding the standard sizes and international specifications of T Nuts is key to fast selection and proper compatibility.
As a professional t nut manufacturer, Xinchi is happy to sharecommon size standards & international specifications of hopper feed t nuts.
Common Hopper Feed T Nut Sizes (in mm)
Below is a general reference for commonly used sizes of Hopper Feed T Nuts. These can also be customized according to client requirements.
| Thread Size | Outer Diameter (D) | Height (H) | Insert Length (L) | Prongs | Recommended Material |
| M4 | 9–10 | 8–9 | 6–7 | 3 or 4 | Carbon Steel / SS |
| M5 | 10–11 | 8–10 | 7–8 | 3 or 4 | Carbon Steel / SS |
| M6 | 12–13 | 10–11 | 8–9 | 4 | Carbon / Alloy Steel |
| M8 | 14–16 | 11–13 | 9–11 | 4 | Carbon / Alloy Steel |
| M10 | 18–20 | 13–15 | 11–13 | 4 | Alloy Steel / SS |
| M12 | 22–25 | 15–18 | 13–15 | 4 | Alloy Steel |
Note: Custom tooling and molds are available for non-standard specifications.
International T Nut Standards & Global Specifications
To ensure seamless integration with global automation systems and fastening applications, Hopper Feed T Nuts are typically designed in line with several international standards:
2.1 DIN / ISO Metric T Nut Standards
Sizes: M4, M5, M6, M8, M10, M12
Widely used in Europe and Asia (especially Germany, Japan, China)
ISO 4032 and ISO 4033 provide base guidelines for nut dimensions and thread tolerances.
2.2 UNC/UNF Inch T Nut Standards
Common sizes: #6-32, #8-32, #10-24, 1/4″-20, 5/16″-18
Popular in North America (USA, Canada)
Compatible with SAE bolts and studs.
2.3 ANSI/ASME T Nut Standards
Used in mechanical and structural industries in North America
Focuses on dimensional accuracy, thread class, and surface finish requirements.
2.4 BS British T Nut Standards
Though gradually replaced by ISO, still in use in legacy projects or the UK market.
XINCHI – Your Manufacturer of Hopper Feed T Nuts
XINCHI is a professional T Nut manufacturer with industry-leading cold heading capabilities and global export experience.
Our T Nut Manufacturing Advantages:
- 102 Cold Heading Machines for automated, high-precision production;
- Daily Output: Over 10 Million T Nuts;
- Factory Area: 30,000m², with two 6-story production buildings;
- Available Sizes: M4 to M12, metric & inch series;
- Material & Coating Options: carbon steel, stainless steel, alloy steel, zinc, Dacromet, phosphate;
- OEM/ODM Support: Custom tooling from your drawings or samples.
Selection Tips for Hopper Feed T Nuts
- Choose metric or inch T Nut series based on your local market or assembly system;
- Match T Nut shape and prong number with your auto-feeder compatibility;
- Consider surface finish & hardness to ensure feeding efficiency;
- Use alloy steel + anti-corrosion coating for high-stress applications.
Searching for a reliable Hopper Feed T Nut supplier?
XINCHI offers high-efficiency, precision-manufactured T Nuts that meet international standards.
As a trusted fastener supplier, XINCHI can offer a wide range of high-quality fasteners, including nuts, screws, bolts, rivets, washers, etc. If you want to know more about fasteners or want to wholesale fasteners, please feel free to contact us. Our experienced and expert service team will reply as soon as possible. Let XINCHI support your production line with cost-effective and efficient fastener solutions!