Français
Español
Deutsch
A high-strength thread reinforcement component, typically made of precision-machined stainless steel or carbon steel. It features internal and external threads, with one end or a specific section designed with one or more “key” or “tab” protrusions. Thanks to its strong reinforcement and locking effect, it is widely used in aerospace, automotive, mold making, machinery, electronics, and medical equipment—especially in applications requiring frequent disassembly, high vibration resistance, or heavy load capacity.
Key-locking Insert
Wholesale Key-locking Insert Manufacturer
Home / Products / Key-locking Insert / Key-locking Insert
Product Specifications
Common metric specifications
| Category | Model | SpecificatIinotne nal | Thread(6HE)xternal | External thread | lengthDrill | ||
| Micro | M2 | M2*1.4 | M4*0.7 | 3 | 3.4 | ||
| M2.5 | M2.5*0.45 | M4.5*0.75 | 3.8 | 3.9 | |||
| M3 | M3*0.5 | M5*0.8 | 4.2 | 4.4 | |||
| M4 | M4*0.7 | M6*0.75 | 5.2 | 5.5 | |||
| Light | M5 | M5*0.8 | M8*1.25 | 8 | 6.9 | ||
| M6 | M6*1 | M10*1.25 | 10 | 8.8 | |||
| M8 | M8*1.25 | M12*1.25 | 12 | 10.8 | |||
| M10 | M10*1.5 | M14*1.5 | 14 | 12.8 | |||
| M12 | M12*1.75 | M16*1.5 | 16 | 14.8 | |||
| Heavy | M4 | M4*0.7 | M8*1.25 | 8 | 6.9 | ||
| M5 | M5*0.8 | M10*1.25 | 10 | 8.8 | |||
| M6 | M6*1 | M12*1.25 | 12 | 10.8 | |||
| M8 | M8*1.25 | M14*1.5 | 14 | 12.8 | |||
| M10 | M10*1.5 | M16*1.5 | 16 | 14.8 | |||
| M12 | M12*1.75 | M18*1.5 | 18 | 16.8 | |||
Common American Standard(UNFPA/UNC)specifications
| Category | Model specifications | Internal thread(2B) | External thread (2A) | Total length | Drill | |||||||||||||||||||||||||||||||
| Micro | 2-56 | 2-56 | 8-32 | 0.12 | 0.134 | |||||||||||||||||||||||||||||||
| 4-40 | 4-40 | 10-32 | 0.17 | 0.161 | ||||||||||||||||||||||||||||||||
| 6-32 | 6-32 | 12-28 | 0.17 | 0.187 | ||||||||||||||||||||||||||||||||
| 8-32 | 8-32 | 1/4-28 | 0.22 | 0.228 | ||||||||||||||||||||||||||||||||
| Light | 10-32(10-24) | 10-32(10-24) | 5/16-18 | 0.31 | 0.272 | |||||||||||||||||||||||||||||||
| 1/4-20(1/4-28) | 1/4-20(1/4-28) | 3/8-16 | 0.37 | 0.332 | ||||||||||||||||||||||||||||||||
| 5/16-18(5/16-24) | 5/16-18(5/16-24) | 7/16-14 | 0.43 | 0.397 | ||||||||||||||||||||||||||||||||
| 3/8-16(3/8-24) | 3/8-16(3/8-24) | 1/2-13 | 0.50 | 0.453 | ||||||||||||||||||||||||||||||||
| 7/16-20(7/16-14) | 7/16-20(7/16-14) | 9/16-12 | 0.56 | 0.516 | ||||||||||||||||||||||||||||||||
| 1/2-13(1/2-20) | 1/2-13(1/2-20) | 5/8-11 | 0.62 | 0.578 | ||||||||||||||||||||||||||||||||
| Heavy | 8-32 | 8-32 | 5/16-18 | 0.31 | 0.272 | |||||||||||||||||||||||||||||||
| 10-32(10-24) | 10-32(10-24) | 3/8-16 | 0.31 | 0.332 | ||||||||||||||||||||||||||||||||
| 1/4-20(1/4-28) | 1/4-20(1/4-28) | 7/16-14 | 0.37 | 0.397 | ||||||||||||||||||||||||||||||||
| 5/16-24(5/16-18) | 5/16-24(5/16-18) | 1/2-13 | 0.43 | 0.453 | ||||||||||||||||||||||||||||||||
| 3/8-16(3/8-24) | 3/8-16(3/8-24) | 9/16-12 | 0.50 | 0.516 | ||||||||||||||||||||||||||||||||
| 1/2-13(1/2-20) | 1/2-13(1/2-20) | 3/4-16 | 0.62 | 0.70 | ||||||||||||||||||||||||||||||||
Company Profile
Dongtai Jinzhize Metal Products Co., Ltd.
As Key-locking Insert Manufacturer and Key-locking Insert Company, Dongtai Jinzhize Metal Products Co., Ltd. is a specialized manufacturing facility dedicated to threaded connection products for the automotive and aerospace sectors. We primarily produce Helical Wire Inserts, Self-Tapping Inserts, Key Locking Inserts, Threaded Adapters, Oil Plugs, as well as matching installation taps and tools.
Established in 2015, the company operates from a 10,000-square-meter-owned manufacturing plant equipped with hundreds of machine tools and automated production systems. Through years of development, we have built an experienced team of design, development, and production specialists, complemented by a rigorous quality management system and comprehensive after-sales service mechanism.
Our products are widely utilized in the automotive industry (including engines and transmissions for both passenger and commercial vehicles), the aerospace industry, and rail vehicle manufacturing.
With an annual output value of 153 million RMB in 2024, we possess the capability for a large-scale, stable supply. We are committed to providing customers with highly consistent, traceable products and reliable service support.
Related Products
-
The Straight Thread Plug (Hex Socket Plug) is a high-performance sealing solution engineered for precision closure in industrial piping, reservoirs, and mechanical equipment. Distinguished from conventional sealing components, our...
-
In the field of piping prefabrication and installation, precise port closure and testing are of paramount importance. The Tapered Plug is a specialized pipe fitting designed for the temporary sealing of pipe ends, with its core ad...
-
In applications such as pipeline termination, pressure testing, or equipment maintenance, there is a critical need for a sealing component that is structurally robust, reliably sealed, and easy to install. Compared to traditional ...
-
Spiral thread tap are designed for cutting deep internal threads. Unlike straight thread tap, spiral taps have helical grooves that efficiently remove chips during machining, reducing clogging issues. They are ideal for deep holes...
News
-
What Is an Oil Plug and Its Primary Function An oil plug (also known as an oil drain plug) is a threaded fastener that seals the drain port of an oil pan or reservoir. Its primary...
READ MORE -
What Is a Thread Tap? A thread tap is a specialized cutting tool designed to create internal threads within pre-drilled holes. It functions by removing material (cutting taps) or ...
READ MORE -
A wire thread insert is a helically coiled fastening device made from high-tensile stainless steel wire (typically Type 304 or 316) with a diamond-shaped cross-section. It is inse...
READ MORE -
In the era of high-precision industrial manufacturing, the reliability and durability of threaded connections have become a key factor affecting the performance and safety of equi...
READ MORE
Certificate Of Honor
Let's Talk Affiliate Marketing
-
ADDRESS
No. 94, Shiqin Road East, Tangba Village, Shiyan Town, Dongtai City, China E-mail : [email protected] Tel : +86-15061682958 -
QUICKLINKS
Home Products Self-tapping Thread Insert Company Profile News Contact -
Popular product
Self-tapping Thread Insert Internal-external Thread Conversion Nut Wire Thread Insert Three-hole threaded insert Key-locking Insert Oil plug Installation tools Thread Tap -
MEDIA
Copyright © 2025 Dongtai Jinzhize Metal Products Co., Ltd. All Rights Reserved.
Wholesale Key-locking Insert Suppliers
Wholesale Key-locking Insert Suppliers