China Suppliers Factory External Hexagonal Bolt DIN M8-M16 - High Strength Fasteners with Limitations

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China Suppliers Factory External Hexagonal Bolt DIN M8-M16 - High Strength Fasteners with Limitations

While external hexagonal bolts offer numerous benefits in construction and assembly applications, they also have certain limitations that must be considered. These bolts are not suitable for use on thin-walled components or in environments that experience significant impact, vibration, or alternating loads. Additionally, longer bolts may lack full threading, which can complicate the selection of compatible tightening tools. This makes it easier for them to loosen and be replaced. For optimal performance, it is recommended to use a professional wrench for disassembly, as standard tools may struggle to effectively remove them. As a leading supplier in China, our factory provides high-quality hexagonal bolts designed for durability and reliability, ensuring they meet the demands of various industrial applications.

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Product Description

External hexagonal bolts are a common type of mechanical fastener, mainly used for connecting and fixing mechanical equipment.

Dimensional Specifications — M10 to M24

Thread specifications d		M10	M12	M14	M16	M18	M20	M22	M24
P	Pitch	1.50	1.75	2.0	2.0	2.5	2.5	2.5	3
b	L ≤ 125	26	30	34	38	42	46	50	54
	125 < L ≤ 200	32	36	40	44	48	52	56	60
	L > 200	/	/	/	57	61	65	69	73
d_s	Max	10	12	14	16	18	20	22	24
d_s	Min	9.64	11.57	13.57	15.57	17.57	19.48	21.48	23.48
e	Min	19.68	22.58	25.94	29.3	32.66	36.96	39.2	44.8
k	Max	6.69	7.79	9.09	10.29	11.85	12.85	14.35	15.35
k	Min	6.11	7.21	8.51	9.71	11.15	12.15	13.65	14.65
s	Max	18	21	24	27	30	34	36	41
s	Min	17.57	20.16	23.16	26.16	29.16	33	35	40

Dimensional Specifications — M27 to M48

Thread specifications d		M27	M30	M33	M36	M39	M42	M45	M48
P	Pitch	3	3	3	3	3	3	3	3
b	L ≤ 125	60	66	72	78	84	90	96	102
	125 < L ≤ 200	66	72	78	84	90	96	102	108
	L > 200	79	85	91	97	103	109	115	121
d_s	Max	27	30	33	36	39	42	45	48
d_s	Min	26.48	29.48	32.38	35.38	38.38	41.38	44.38	47.38
e	Min	50.4	54.9	60.3	65.9	71.5	71.5	76.3	81.9
k	Min (Tol.)	17.35	19.12	21.42	22.92	25.42	26.42	28.42	30.42
k	Min (Ref.)	16.65	18.28	20.58	22.08	24.58	25.58	27.58	29.58
s	Max	46	50	55	60	65	65	70	75
s	Min	45	49	53.8	58.8	63.8	63.8	68.1	73.1

External Hexagonal Bolts Are Commonly Used For

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Connecting Components

The outer hexagonal bolt fixes multiple components together through the action of torque, forming a whole.

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Load Bearing

Due to its high-strength design, the outer hexagonal bolt can withstand large loads and shear forces, ensuring the firmness of the connection.

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Easy Installation

No special fixtures or tools are required; it can be completed with a standard wrench, improving production efficiency.

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Wide Application Range

Suitable for heavy machinery, construction, and bridge engineering, meeting various demanding industrial requirements.

Frequently Asked Questions

❓ What are external hexagonal bolts used for?

External hexagonal bolts are widely used in mechanical engineering, construction, and bridge engineering to connect and fix components together. They can withstand large loads and shear forces, making them suitable for heavy-duty applications.

❓ What thread sizes are available?

External hexagonal bolts are available in a wide range of thread sizes, from M10 up to M48. Common sizes include M10, M12, M16, M20, M24, M30, M36, and M48, covering various industrial needs.

❓ What tools are needed for installation?

No special fixtures are required. External hexagonal bolts can be installed using a standard wrench or socket wrench, which makes them easy to install and remove for maintenance.

❓ How does the thread pitch vary with bolt size?

Thread pitch increases with bolt diameter. For example, M10 bolts have a pitch of 1.50 mm, while bolts from M27 to M48 typically have a consistent pitch of 3.0 mm to ensure secure fastening.

❓ How is the thread engagement length (b) determined?

The thread engagement length depends on the bolt diameter and total length (L). There are three standard ranges: L ≤ 125 mm, 125 < L ≤ 200 mm, and L > 200 mm, with longer bolts requiring more thread engagement.

❓ Are they suitable for heavy-duty construction?

Yes. These bolts are specifically designed with high-strength materials and precise tolerances, making them ideal for structural steel connections, bridges, and heavy machinery.

Product Detail

China Suppliers Factory External Hexagonal Bolt DIN M8-M16 - High Strength Fasteners with Limitations