Product Introduction
Our threaded inserts for square metal tubes are heavy-duty press-fit tube nuts designed to create stable internal threads in square metal profiles, featuring spring steel locking clips for secure installation and providing a reliable base for casters, leveling feet, and structural components.
Technical Specifications
Core Technical Specifications
|
Parameter |
Single Clip Design |
Double Clips Design |
|
Platform Material |
Steel / Zinc plated (Cr3+) |
Steel / Zinc plated (Cr3+) |
|
Clip Material |
Steel / black oxide |
Steel / black oxide |
|
Tube Thickness |
16-18ga (≈1.2-1.5mm) |
16-18ga (≈1.2-1.5mm) |
|
Clip Qty |
Single clip |
Double clips |
|
Mounting Type |
Thread stem mount |
Thread stem mount |
Single Clip Star-Type Threaded Inserts
|
Inch Thread |
Metric Thread |
Part no. |
Outside dimension of the tube |
||
|
1/4-20 |
M6-P1.0 |
S307-19B14 (M6) |
19mm / 0.75 inch |
||
|
S307-22B14 (M6) |
22mm / 0.875 inch |
||||
|
S307-25B14 (M6) |
25mm / 1 inch |
||||
|
S307-28B14 (M6) |
28mm / 1.125 inch |
||||
|
S307-32B14 (M6) |
32mm / 1.25 inch |
||||
|
S307-38B14 (M6) |
38mm / 1.5 inch |
||||
|
S307-44B14 (M6) |
44mm/ 1.75 inch |
||||
|
S307-50B14 (M6) |
50mm /2 inch |
||||
|
Inch Thread |
Metric Thread |
Part no. |
Outside dimension of the tube |
||
|
5/16-18 |
M8-P1.25 |
S307-19B516 (M8) |
19mm / 0.75 inch |
||
|
S307-22B516 (M8) |
22mm / 0.875 inch |
||||
|
S307-25B516 (M8) |
25mm / 1 inch |
||||
|
S307-28B516 (M8) |
28mm / 1.125 inch |
||||
|
S307-32B516 (M8) |
32mm / 1.25 inch |
||||
|
S307-38B516 (M8) |
38mm / 1.5 inch |
||||
|
S307-44B516 (M8) |
44mm/ 1.75 inch |
||||
|
S307-50B516 (M8) |
50mm /2 inch |
||||
|
Inch Thread |
Metric Thread |
Part no. |
Outside dimension of the tube |
||
|
3/8-16 |
M10-P1.5 |
S307-22B38 (M10) |
22mm / 0.875 inch |
||
|
S307-25B38 (M10) |
25mm / 1 inch |
||||
|
S307-28B38 (M10) |
28mm / 1.125 inch |
||||
|
S307-32B38 (M10) |
32mm / 1.25 inch |
||||
|
S307-38B38 (M10) |
38mm / 1.5 inch |
||||
|
S307-44B38 (M10) |
44mm/ 1.75 inch |
||||
|
S307-50B38 (M10) |
50mm /2 inch |
||||
Double Clips Star-Type Threaded Inserts
|
Inch Thread |
Metric Thread |
Part no. |
Outside dimension of the tube |
|
1/4-20 |
M6-P1.0 |
D307-19B14 (M6) |
19mm / 0.75 inch |
|
D307-22B14 (M6) |
22mm / 0.875 inch |
||
|
D307-25B14 (M6) |
25mm / 1 inch |
||
|
D307-28B14 (M6) |
28mm / 1.125 inch |
||
|
D307-32B14 (M6) |
32mm / 1.25 inch |
||
|
D307-38B14 (M6) |
38mm / 1.5 inch |
||
|
D307-44B14 (M6) |
44mm/ 1.75 inch |
||
|
D307-50B14 (M6) |
50mm /2 inch |
||
|
Inch Thread |
Metric Thread |
Part no. |
Outside dimension of the tube |
|
5/16-18 |
M8-P1.25 |
D307-19B516 (M8) |
19mm / 0.75 inch |
|
D307-22B516 (M8) |
22mm / 0.875 inch |
||
|
D307-25B516 (M8) |
25mm / 1 inch |
||
|
D307-28B516 (M8) |
28mm / 1.125 inch |
||
|
D307-32B516 (M8) |
32mm / 1.25 inch |
||
|
D307-38B516 (M8) |
38mm / 1.5 inch |
||
|
D307-44B516 (M8) |
44mm/ 1.75 inch |
||
|
D307-50B516 (M8) |
50mm /2 inch |
||
|
Inch Thread |
Metric Thread |
Part no. |
Outside dimension of the tube |
|
3/8-16 |
M10-P1.5 |
D307-22B38 (M10) |
22mm / 0.875 inch |
|
D307-25B38 (M10) |
25mm / 1 inch |
||
|
D307-28B38 (M10) |
28mm / 1.125 inch |
||
|
D307-32B38 (M10) |
32mm / 1.25 inch |
||
|
D307-38B38 (M10) |
38mm / 1.5 inch |
||
|
D307-44B38 (M10) |
44mm/ 1.75 inch |
||
|
D307-50B38 (M10) |
50mm /2 inch |
Product Features
High-Grip Star Clips
Equipped with spring steel clips treated with a black oxide finish, providing strong resistance against pull-out and rotational forces.
Double-Clip Reliability
The double-clip configuration is specially designed for deep pipes, allowing equipment to turn over thresholds and extend lines smoothly.
Corrosion-Resistant Base
Features a heavy steel platform finished with premium trivalent chromium zinc (Cr3+) for exceptional anti-rust longevity.
Quality & Compliance
Strict Dimensional Consistency: Every production batch undergoes rigorous dimensional checks to ensure outer diameters (O.D.) and wall thickness tolerances fit perfectly within 16-18ga tubes without loose movement.
Premium Salt-Spray & Anti-Rust Performance: The trivalent chromium zinc (Cr3+) base plating combined with black oxide star clips delivers superior industrial corrosion resistance, ensuring a long shelf life and stable field performance.
Installation Guide
Environmental Safety Verification: Formulated completely with non-toxic polymers and eco-friendly steel treatments, meeting full international environmental and restriction directives.
Packaging & Logistics
Minimum Order Quantity (MOQ): 5,000 pieces per specific size and configuration.
Industrial Packing: Standard export bulk cartons, meticulously packed to protect the steel platforms and spring clips from scratches or distortion during long-distance shipping.
Trade Terms: FOB Taiwan,China.
Payment Method: T/T.
Production Lead Time: Typically 30 working days for standard volume tailored manufacturing, ensuring strict dimensional and quality checks before dispatch.
FAQ
Q: What materials are the threaded inserts made from?
A: The body is made from zinc-plated steel (Cr3+), while the locking clips are manufactured from black oxide spring steel for high strength and corrosion resistance.
Q: What types of square tubes are compatible with these threaded inserts?
A: They are designed for square metal tubes with 16–18 gauge wall thickness. Please refer to the size chart or contact us for compatibility.
Q: What are these threaded inserts commonly used for?
A: They are commonly used to install casters, leveling feet, adjustable glides, threaded stems, and other hardware in square metal tubing.
Q: What is the difference between the single-clip and double-clip designs?
A: The single-clip version is suitable for general applications, while the double-clip design provides stronger retention and improved stability for heavier-duty or high-vibration environments.
Q: How are the threaded inserts installed?
A: They are press-fitted into the tube using a rubber mallet or press tool. The spring clips expand to securely lock the insert inside the tube.
Q: Can different thread sizes be supplied?
A: Yes. Multiple thread sizes are available, and customized specifications can be provided for OEM projects.
Q: What industries commonly use these threaded inserts?
A: They are widely used in furniture, medical equipment, shelving systems, display fixtures, carts, fitness equipment, and industrial metal structures.
Q: What is the minimum order quantity?
A: The standard MOQ is 5,000 pieces per size and configuration.
Q: Can you provide OEM or customized manufacturing services?
A: Yes. We offer OEM and ODM services, including customized dimensions, thread specifications, surface treatments, and packaging.
Q: What support do you provide for OEM and wholesale customers?
A: We provide sample evaluation, technical consultation, custom product development, production planning, and reliable export support for long-term business partners.
Hot Tags: threaded inserts for square metal tube, threaded inserts for square metal tube manufacturers, suppliers, factory, Grip Ring Caster Socket, Star Fangled Nut, threaded inserts for metal, Threaded Inserts for Square Metal Tube, Threaded Round Tube Inserts, tube connector
