UNF/UNC Free Running Helicoil Inserts are a new type of internally threaded industrial fasteners. They are generally made of high-quality stainless steel wire 304 (18-8) rolled into a diamond-shaped cross-section, and wound in the shape of a spring, it is a high-precision internal thread concentric body.
The use of wire thread inserts has achieved the goal of high-strength connection of low-strength metals (such as aluminum, aluminum-magnesium alloy, гэх мэт.) and non-metallic materials (such as iron wood, plastic, nylon, PP, PE, гэх мэт.). After a long period of time and Extensive industrial application practice has verified its feasibility and stability.
| Drawing No. | dXP | K xd | L | W | d1 min. max. | B Tap Drill Size | t3 max. | |
| Free Running | Screw- Lock | |||||||
| L 4010561 | L 4012561 | 2-56 | 1d | 2.2 | 3.0 | 2.7-2.9 | 2.4 | 1.8 |
| L 4010562 | L 4012562 | 1.5d | 3.3 | 5.25 | 2.9 | |||
| L 4010563 | L 4012563 | 2d | 4.4 | 7.4 | 3.9 | |||
| L 4010564 | L 4012564 | 2.5d | 5.5 | 9.6 | 5.0 | |||
| L 4010571 | L 4012571 | 4- 40 | 1d | 2.9 | 2.8 | 3.6-4.0 | 3.1 | 2.5 |
| L 4010572 | L 4012572 | 1.5d | 4.3 | 4.8 | 3.9 | |||
| L 4010573 | L 4012573 | 2d | 5.8 | 6.8 | 5.4 | |||
| L 4010574 | L 4012574 | 2.5d | 7.2 | 8.8 | 6.8 | |||
| L 4010581 | L 4012581 | 5-40 | 1d | 3.2 | 3.3 | 4.0-4.4 | 3.4 | 2.8 |
| L 4010582 | L 4012582 | 1.5d | 4.8 | 5.5 | 4.3 | |||
| L 4010583 | L 4012583 | 2d | 6.4 | 7.8 | 6.0 | |||
| L 4010584 | L 4012584 | 2.5d | 7.9 | 10.0 | 7.5 | |||
| L 4010591 | L 4012591 | 6-32 | 1d | 3.5 | 2.8 | 4.5-4.9 | 3.8 | 3.1 |
| L 4010592 | L 4012592 | 1.5d | 5.3 | 4.8 | 4.9 | |||
| L 4010593 | L 4012593 | 2d | 7.0 | 6.7 | 6.6 | |||
| L 4010594 | L 4012594 | 2.5d | 8.8 | 8.7 | 8.4 | |||
| L 4010601 | L 4012601 | 8-32 | 1d | 4.2 | 3.5 | 5.2-5.6 | 4.4 | 3.8 |
| L 4010602 | L 4012602 | 1.5d | 6.3 | 5.9 | 5.9 | |||
| L 4010603 | L 4012603 | 2d | 8.3 | 8.3 | 8.0 | |||
| L 4010604 | L 4012604 | 2.5d | 10.5 | 10.7 | 10.1 | |||
| L 4010611 | L 4012611 | 10-24 | 1d | 4.8 | 2.9 | 6.2-6.6 | 5.2 | 4.3 |
| L 4010612 | L 4012612 | 1..5d | 7.2 | 5.0 | 6.7 | |||
| L 4010613 | L 4012613 | 2d | 9.6 | 7.1 | 9.1 | |||
| L 4010614 | L 4012614 | 2.5d | 12.1 | 9.2 | 11.6 | |||
| L 4010621 | L 4012621 | 12-24 | 1d | 5.5 | 3.5 | 6.8-7.2 | 5.8 | 5.0 |
| L 4010622 | L 4012622 | 1.5d | 8.2 | 5.9 | 7.7 | |||
| L 4010623 | L 4012623 | 2d | 11.0 | 8.3 | 10.5 | |||
| L 4010624 | L 4012624 | 2.5d | 13.7 | 10.7 | 13.2 | |||
| L 4010631 | L 4012631 | 1/4″-20 | 1d | 6.4 | 3.4 | 8.0-8.4 | 6.7 | 5.8 |
| L 4010632 | L 4012632 | 1.5d | 9.5 | 5.7 | 8.9 | |||
| L 4010633 | L 4012633 | 2d | 12.7 | 8.0 | 12.1 | |||
| L 4010634 | L 4012634 | 2.5d | 15.9 | 10.3 | 15.3 | |||
| L 4010641 | L 4012641 | 5/16″-18 | 1d | 7.9 | 4.0 | 9.7-10.2 | 8.4 | 7.2 |
| L 4010642 | L 4012642 | 1..5d | 11.9 | 6.6 | 11.2 | |||
| L 4010643 | L 4012643 | 2d | 15.9 | 9.3 | 15.2 | |||
| L 4010644 | L 4012644 | 2.5d | 19.8 | 11.9 | 19.1 | |||
| L 4010651 | L 4012651 | 3/8″-16 | 1d | 9.5 | 4.4 | 11.5-12.0 | 10.0 | 8.7 |
| L 4010652 | L 4012652 | 1,.5d | 14.3 | 7.2 | 13.5 | |||
| L 4010653 | L 401 2653 | 2d | 19.1 | 10.1 | 18.3 | |||
| L 4010654 | L 401 2654 | 2.5d | 23.8 | 12.9 | 23.0 | |||
| L 4010661 | L 4012661 | 7/16″-14 | 1d | 11.1 | 4.5 | 13.4-14.0 | 11.6 | 10.2 |
| L 4010662 | L 4012662 | 1.5d | 16.7 | 7.4 | 15.8 | |||
| L 4010663 | L 401 2663 | 2d | 22.2 | 10.3 | 21.3 | |||
| L 401 0664 | L 4012664 | 2.5d | 27.8 | 13.1 | 26.9 | |||
| L 4010671 | L 4012671 | 1/2″-13 | 1d | 12.7 | 4.8 | 15.2-15.8 | 13.2 | 11.7 |
| L 4010672 | L 4012672 | 1.5d | 19.1 | 7.9 | 18.1 | |||
| L 4010673 | L 4012673 | 2d | 25.4 | 10.9 | 24.4 | |||
| L 4010674 | L 4012674 | 2.5d | 31.8 | 13.9 | 30.8 | |||
Other sizes,special designs and materials on request.
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