Pan Head Cross Recess Tapping Screw

Xiaoguo® Pan head cross recess tapping screw China is widely used in furniture, automotive parts, and electrical appliance assembly. The drive design makes it easy to install With its thread design and tapered tip, it requires no pre-tapping. It achieves a secure locking effect and effectively prevents loosening.

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Product Description

The Pan head cross recess tapping screw from manufacturer Xiaoguo®is a very common type of screw.Its head is in the shape of a flat disc, with a cross-shaped groove on it. This groove can be tightened using a cross-head screwdriver.Its most distinctive feature is that it doesn't require pre-drilling of threads on the workpiece - all you need to do is drill a suitable-sized hole in a metal plate, plastic part or wood, and simply screw it in.

It will automatically "carve" the corresponding internal threads in the hole and securely grip.Pan head cross recess tapping screw are widely used in the construction of electrical enclosures, automotive interiors, furniture assembly, and the quick connection of hardware components. They are particularly suitable for efficient installation using electric screwdrivers on mass production lines.

Pan Head Cross Recess Tapping Screw

Working principle

The working principle of a Pan head cross recess tapping screw is based on metal plastic deformation or slight cutting, depending on the properties of the materials being joined and the design of the screw's tail.

Pre-fabricated bottom hole

Before using self-tapping screws, a pilot hole must be drilled or punched in the connected component.The function of the bottom hole is to guide the screws and control the space for material flow.

Form internal thread

When the Pan head cross recess tapping screw is rotated and axially advanced, the conical tip is the first to enter the bottom hole, causing a slight expansion of the hole opening.Because the thread is larger than the diameter of the bottom hole, the thread teeth will exert radial compression on the material of the hole wall.

Locking stage

When the screw is fully inserted, the threaded groove formed by compression or cutting is in alignment with the screw thread.The connected material undergoes a slight rebound within the elastic limit, tightly gripping the screw threads and generating a huge frictional resistance.This friction force acts on both of them simultaneously, preventing the screw from loosening on its own during vibration or under external force.

Pan Head Cross Recess Tapping Screw

FAQ

（1）How thick of steel plates can it be screwed into?

It is recommended that the thickness of the connected steel plates be no greater than the nominal diameter of the screws.Soft materials such as plastic and wood can be appropriately thickened.

（2）Why does it feel like there is a lot of torque when twisting, and even causes the nail to break?

Possible causes and solutions:

The bottom hole is too small → It should be appropriately enlarged

Excessive installation torque → Reduce rotational speed

（3）What is your minimum order quantity (MOQ)?

Standard specification bulk MOQ of Pan Head Cross Recess Tapping Screw is approximately 10,000 - 50,000 pieces.

Pan Head Cross Recess Tapping Screw

Mon	ST2.2	ST2.9	ST3.5	ST4.2	ST4.8	ST5.5	ST6.3	ST8	ST9.5
P	0.8	1.1	1.3	1.4	1.6	1.8	1.8	2.1	2.1
a max	0.8	1.1	1.3	1.4	1.6	1.8	1.8	2.1	2.1
da max	2.8	3.5	4.1	4.9	5.6	6.3	7.3	9.2	10.7
dk max	4	5.6	7	8	9.5	11	12	16	20
dk min	3.7	5.3	6.64	7.64	9.14	10.57	11.57	15.57	19.48
k max	1.6	2.4	2.6	3.1	3.7	4	4.6	6	7.5
k min	1.4	2.15	2.35	2.8	3.4	3.7	4.3	5.6	7.1
r min	0.1	0.1	0.1	0.2	0.2	0.25	0.25	0.4	0.4
No.	0	1	2	2	2	3	3	4	4
M	1.9	3	3.9	4.4	4.9	6.4	6.9	9	10.1
t min	0.85	1.4	1.4	1.9	2.4	2.6	3.1	4.15	5.2
t max	1.2	1.8	1.9	2.4	2.9	3.1	3.6	4.7	5.8
d1 max	1.63	2.18	2.64	3.1	3.58	4.17	4.88	6.2	7.85
d1 min	1.52	2.08	2.51	2.95	3.43	3.99	4.7	5.99	7.59
d max	2.24	2.9	3.53	4.22	4.8	5.46	6.25	8	9.65
d mn	2.1	2.76	3.35	4.04	4.62	5.28	6.03	7.78	9.43