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DIN 931 Hex Bolts

The DIN 931 hex bolt is a half-threaded hex head bolt that conforms to the German DIN standard. Widely used in machinery, construction, and industrial applications, these bolts are typically made from high-quality carbon steel, stainless steel, or alloy steel for superior mechanical performance and tensile strength. The half-threaded design makes it ideal for applications requiring partial fastening or precise positioning. Surface treatment options include zinc plating, electroplating, and black oxide coating for enhanced corrosion resistance.

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Key Features

DIN 931 Standard: Ensures precise dimensions and stable performance, suitable for various industrial and construction applications.

Half-Threaded Design: Provides high-strength fastening and is ideal for applications that require fixed and movable components.

Material Options: Available in carbon steel, stainless steel, and alloy steel to suit different working environments.

Surface Treatment: Zinc plating, electroplating, or black oxide coating enhances corrosion resistance and extends the bolt’s lifespan.

Specifications Table

Parameter	Description
Standard	DIN 931
Material	Carbon Steel, Stainless Steel, Alloy Steel
Diameter Range	M5 - M52
Length Range	10mm - 500mm
Thread Type	Half-Threaded
Surface Treatment	Zinc Plating, Electroplating, Black Oxide
Tensile Strength	Grade 8.8, 10.9, 12.9
Applications	Machinery, Construction, Industrial Assemblies

Applications

Machinery Manufacturing，Construction and Infrastructure Projects，

Industrial Assemblies and Maintenance，Precision Positioning in Engineering Projects

Product Standards

Thread Specifications
Thread Size (Mon)	P	da Max	ds Max	ds Min	e Min	k Min	k Max	r Min	s Max	s Min
M68	6	75	68	67.26	110.51	42.5	43.5	2	100	97.8
M72	6	79	72	71.26	116.16	44.5	45.5	2	105	102.8
M76	6	83	76	75.26	121.81	47.5	48.5	2	110	107.8
M80	6	87	88	79.26	127.46	49.5	50.5	2	115	112.8
M90	6	97	90	89.13	144.08	56.4	57.6	2.5	130	127.5
M100	6	107	100	99.13	161.02	62.4	63.6	2.5	145	142.5
M110	6	117	110	109.13	172.32	68.4	69.6	2.5	155	152.5
M125	6	132	125	124	200.57	78.4	79.6	2.5	180	177.5
M140	6	147	140	139	220.8	87.3	88.7	2.5	200	195.4
M160	8	167	160	159	254.7	99.3	100.7	2.5	230	225.4

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