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Ferry Bolt

What should we do if the bolts in a high-temperature working environment become soft? The Xiaoguo® Ferry bolt is made of heat-resistant alloy steel with a Dacromet coating, which can withstand a continuous temperature of 300°C. Its service life can be extended by three times in specific high-temperature working environments. If you are interested, we can provide a test report.

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Product Description

Usage scenario

The application scope of Ferry bolt is very extensive, mainly concentrated in those critical industries that have extremely strict requirements for strength, vibration resistance and space.

（1）Automotive Industry

This is one of the most widely applied fields, mainly due to its small head size, ability to withstand high torque and excellent vibration resistance, making it highly suitable for installation in compact parts such as engines and gearboxes.

（2）Aerospace

Aerospace engineering is a field with extremely high requirements for weight, strength and reliability. The Ferry bolt are standard equipment. Their head design enables their use in confined spaces and can provide higher torque than ordinary bolts.

（3）Heavy Machinery & Mining

In heavy industries such as mines and cement plants, bolts can alleviate the damage to equipment caused by extreme mechanical stress and abrasive materials.

（4）Oil & Gas

In a confined environment with high intensity and high corrosion resistance, the advantage of its small head size can effectively save space and provide effective corrosion prevention.

（5）Energy & Power

The bolts of wind turbine towers, oil drilling equipment, and internal components of nuclear power plants need to be able to withstand vibrations and impacts.

（6）Industrial & General Machinery

Workpiece fixtures, production line equipment, compressors, etc. - general industrial assembly.

（7）Construction & Structural Engineering

Used for the connection nodes of beams and columns in steel structures such as bridges and large buildings.

Ferry Bolt

（8）Marine & Offshore

Used for the connection nodes of beams and columns in steel structures such as bridges and large buildings.

（9）Rail Transportation

The Ferry bolt are also used in key parts of rail vehicles. They are used to connect the suspension system and fix the connecting devices between the trains, and they have extremely high safety requirements.

（10）Medical Devices

Titanium alloy is used as a material for orthopedic implants due to its excellent biocompatibility and corrosion resistance, such as in bone screws used for fracture fixation.

（11）Electronics & Telecommunications

In the field of electronic and communication equipment, small-sized bolts are used to fix precise components. Their head design also helps prevent dust accumulation, which is beneficial for keeping the equipment clean.

（12）New Energy

In emerging fields such as solar power generation and new energy batteries, it is also used as a structural connection component and a fastener for battery modules.

Ferry Bolt

Mon	M22	M24	M27	M30	M33	M36	M39	M42	M45	M48	M52
P	2.5	3	3	3.5	3.5	4	4	4.5	4.5	5	5
dc max	33.3	38.1	38.1	42.8	47.5	52.3	57	61.7	66.5	76	76
dc min	32.68	37.48	37.48	42.18	46.88	51.56	56.26	60.96	65.76	75.26	75.26
ds max	22	24	27	30	33.0	36	39	42.0	45.0	48	52
ds min	21.79	23.79	26.79	29.79	32.75	35.75	38.75	41.75	44.75	47.75	51.7
e min	25.4	27.7	27.7	34.6	36.90	41.60	47.30	47.30	53.10	57.70	57.70
h max	6.9	7.98	7.98	9.21	9.62	10.82	12.71	12.56	15.65	16.1	16.1
h min	6.54	7.35	7.35	8.78	9.19	10.39	12.28	12.13	15.13	15.58	15.58
k max	22.36	25.56	25.56	28.96	32.0	35.2	38.3	41.4	44.7	51.03	51.03
k min	22.04	25.24	25.24	28.54	31.6	34.80	37.90	41.00	44.30	50.57	50.57
r max	1	1.2	1.20	1.4	1.60	1.60	1.80	1.80	2.00	2.20	2.20
r min	0.75	0.95	0.95	1.15	1.35	1.35	1.55	1.55	1.75	1.82	1.82
s max	22	24	24	30	32.00	36.00	41.00	41.00	46.0	50.0	50.0
s min	21.79	23.79	23.79	29.79	31.75	35.75	40.75	40.75	45.75	49.75	49.75

FAQ

（1）What are the main dimensions?

Take DIN 34800 M10×1.5×40 as an example: The thread specification is M10, the pitch is 1.5mm, the nominal length is 40mm, the outer diameter of the head is approximately 14mm, and the diameter of the flange is approximately 20mm.

（2）What are the tensile strength and hardness of a Ferry bolt of grade 12.9?

A: The minimum tensile strength is 1200 MPa (approximately 174,000 psi), the minimum yield strength is 1080 MPa, and the Rockwell hardness range is 39-44 HRC.

（3）How long is the delivery period? Can laser marking or brand packaging be provided?

Standard products in stock take 3-7 days, custom products take 20-30 days.

We can provide:

Laser marking, customized packaging, and rust-proof packaging - these customized services can be discussed in more detail later.