Product Overview

Socket Countersunk Head Screw is a precision fastening component featuring a countersunk head structure. After installation, the screw head can remain nearly flush with the workpiece surface, helping reduce surface protrusion and improving overall appearance and structural compactness.

Manufactured from stainless steel and carbon steel, this screw uses an internal hex drive method for installation. It is suitable for industrial products requiring limited installation space, smooth surfaces, and reliable fastening performance.

Product Features

Countersunk head design provides a smoother and flatter installation surface.
Helps save installation space and is suitable for hidden fastening structures.
Internal hex drive improves assembly convenience and connection stability.
Suitable for precision equipment and structural components.
Supports customized specifications, materials, and surface treatments.

Applications

Socket Countersunk Head Screw is widely used in new energy vehicles, energy storage equipment, medical devices, aerospace components, precision instruments, automation equipment, and electronic product structures.

Comprehensive Manufacturing Advantages

The company has a 3,500㎡ production facility, an independent R&D team, and a complete production management system, providing professional capabilities in fastening component development, manufacturing, and customization.

The company has served customers in the new energy and automotive industries, including BYD, SAIC Motor, and CATL-related projects, and continues to follow standardized quality management procedures during production.

In addition, the company supports customized production based on technical drawings and samples. According to different project requirements, the company provides material selection, specification matching, sample confirmation, and batch delivery services to provide customers with reliable fastening solutions.

Product Parameters

Parameter	Description
Product Name	Socket Countersunk Head Screw
Material	Stainless steel, carbon steel
Head Structure	Countersunk head with internal hex drive
Thread Specification	Customized according to customer requirements
Length Specification	Non-standard sizes supported
Surface Treatment	Selected according to application environment
Accuracy Requirements	According to customer technical standards
Custom Method	Drawing and sample development supported

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DIN 7991 - 1986

Hex Socket Countersunk Head Screw

product-691-456

Thread Size		M3	M4	M5	M6	M8	M10	M12	M14	M16	M18	M20	M22	M24
d
P	Pitch	0.5	0.7	0.8	1	1.25	1.5	1.75	2	2	2.5	2.5	2.5	3
α	tol.(+2)	90°	90°	90°	90°	90°	90°	90°	90°	90°	90°	90°	60°	60°
b	L≤125	12	14	16	18	22	26	30	34	38	42	46	50	54
	125＜L ≤ 200	/	/	/	24	28	32	36	40	44	48	52	56	60
	L＞200	/	/	/	/	/	45	49	53	57	61	65	69	73
d_k	Max.=Nominal	6	8	10	12	16	20	24	27	30	33	36	36	39
d_k	Min.	5.7	7.64	9.64	11.57	15.57	19.48	23.48	26.48	29.48	32.38	35.38	35.38	38.38
d_s	Max.=Nominal	3	4	5	6	8	10	12	14	16	18	20	22	24
d_s	Min.	2.86	3.82	4.82	5.82	7.78	9.78	11.73	13.73	15.73	17.73	19.67	21.67	23.67
e	Min.	2.3	2.87	3.44	4.58	5.72	6.86	9.15	11.43	11.43	13.72	13.72	16	16
k	Max.	1.7	2.3	2.8	3.3	4.4	5.5	6.5	7	7.5	8	8.5	13.1	14
s	Nominal	2	2.5	3	4	5	6	8	10	10	12	12	14	14
	Min.	2.02	2.52	3.02	4.02	5.02	6.02	8.025	10.025	10.025	12.032	12.032	14.032	14.032
	Max.	2.1	2.6	3.1	4.12	5.14	6.14	8.175	10.175	10.175	12.212	12.212	14.212	14.212
t	Max.=Nominal	1.2	1.8	2.3	2.5	3.5	4.4	4.6	4.8	5.3	5.5	5.9	8.8	10.3
t	Min.	0.95	1.55	2.05	2.25	3.2	4.1	4.3	4.5	5	5.2	5.6	8.44	9.87