Cross-recessed (+) Flat Head Self-tapping Screw Type 1 A Shape

Brand :

SUNCO

Caution

The product images are representative only. Specifications may vary by part number, including shape and color.
In addition, the color of the actual product may differ depending on the material and surface treatment.
*For "No" surface treatment, the color may differ from the representative image due to hardening.

Product Description

A self-tapping screw can be secured directly to a component even if a female thread has not been cut into the component.
Type 1 self-tapping screws have a pointed tip and are characterized by having the coarsest pitch (distance between threads) among Types 1 to 3 self-tapping screws.
Type 1 is mainly used when the component is wood, thin steel plate (recommended for plate thickness of 1.2 mm or less), hardboard, etc.
It is also possible to use a Type 1 self-tapping screw instead of a wood screw (however, a wood screw cannot be used as a substitute for a self-tapping screw).

Cross-recessed (+) flat head self-tapping screw Type 1, Type A external shape diagram

Nominal diameter			2	2.3	2.5	2.6	3	3.5	4	4.5	5	6	8
dk		Reference dimension	4.0	4.6	5.0	5.2	6.0	7.0	8.0	9.0	10.0	12.0	16.0
dk		Tolerance	0 -0.4				0 -0.5			0 -0.6		0 -0.7	0 -0.8
k		Reference dimension	1.20	1.35	1.45	1.50	1.75	2.00	2.30	2.55	2.80	3.40	4.40
k		Tolerance	0 -0.2				0 -0.3					0 -0.4
Cross - recessed	m	Reference	2.2	2.4	2.6	2.6	3.6	4.1	4.5	4.9	5.1	6.7	8.4
	Q	Maximum	1.01	1.21	1.42	1.42	1.43	1.93	2.33	2.73	2.93	3.26	4.96
	Q		0.65	0.85	1.05	1.05	0.91	1.40	1.79	2.19	2.38	2.70	4.36
	Cross Recessed Number		1				2					3
r		Maximum	0.3				0.4		0.5		0.6	0.7	0.9
d		Maximum	2.1	2.4	2.6	2.7	3.1	3.65	4.15	4.65	5.2	6.2	8.2
d		Minimum	2	2.3	2.5	2.6	3	3.5	4	4.5	5	6	8
Number of threads per 25.4 mm			32	32	28	28	24	18	16	14	12	10	9