Cup Head Square Shaped Neck Bolts

After undergoing high-frequency dynamic testing, the Xiaoguo® discount Cup head Square shaped Neck Bolts can still operate normally and without loosening under continuous vibration conditions. It is an ideal choice for dynamic equipment such as automotive chassis and agricultural machinery.

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Product Description

Installation steps

（1）Drilling preparation: First, determine the installation location for the Cup Head Square Neck Bolts, and drill a matching hole.If installing on hardwood or metal, the square neck part usually needs to have a square hole pre-cut to allow the square neck of the bolt head to fit into it, preventing rotation.

（2）Install the screw: Insert the " Bolts" from the threaded side, ensuring that the square neck of the head fully fits into the pre-cut square hole.

（3）Install the washers: On the other side where the screw protrudes, place the flat washer and the spring washer in sequence to distribute the pressure and prevent loosening.

（4）Tightening the nut: Insert the matching nut manually onto the screw, then use a torque wrench or a regular wrench to tighten it alternately and symmetrically. Just operate on one side of the nut; there is no need to fix the head.

（5）Final inspection: Ensure that the head of the bolt is tightly against the surface of the workpiece, the nut is securely fastened, and there is no misalignment.

Cup Head Square Shaped Neck Bolts

After-sales service

The after-sales service for Cup head Square shaped Neck Bolts mainly includes the following aspects:

（1）Product quality guarantee

Ensure that the materials and processes of the product are free from defects, and provide material certificates and performance test reports.

（2）Handling of Damage During Transportation and Quantity Shortage

The buyer should immediately inspect the products upon receipt to check for any damage during transportation or quantity shortage. If any issues are found, they can contact the after-sales team immediately. Generally, we will process a claim application for you within 12 hours.

（3）Return and Exchange Policy

We offer a 30-day return service, provided that the Cup head Square shaped Neck Bolts remains in a saleable condition. However, custom-made products and special orders generally do not support returns.

（4）Warranty Period

We offer a 12-month limited warranty, covering defects in materials and workmanship.

（5）Technical Support and Consulting Services

Offer pre-sale and post-sale technical consultations, covering aspects such as product selection, performance level recommendations, surface treatment options, and installation guidelines.

Cup Head Square Shaped Neck Bolts

Mon	M5	M6	M8	M10	M12	M16	M20	M24
P	0.8	1	1.25	1.5	1.75	2	2.5	3
dk max	11.3	13.5	18	22.5	27	36	45	54
dk min	10.2	12.4	16.9	21.2	25.7	34.4	43.4	52.1
ds max	5.48	6.48	8.58	10.58	12.7	16.7	20.84	24.84
ds min	4.52	5.52	7.42	9.42	11.3	15.3	19.16	23.16
k max	3.2	3.6	4.8	5.8	6.8	8.9	10.9	13.1
k min	2.5	3	4	5	6	8	10	12
r max	0.5	0.5	0.5	0.5	1	1	1	1.5

Sample Policy

Regarding the sample of Cup head Square shaped Neck Bolts, we have a mature and flexible general policy.

Below is a summary of the key steps for obtaining the sample.

Sample type Applicable situation Common policies Cost explanation

Free samples Standard products in stock are available. Free samples are provided, but customers usually have to bear the shipping costs. Samples are provided free of charge, or a small handling fee will be charged.

Fee-based sample Customized, non-inventory or special-material samples The customer needs to pay for the sample fee and the shipping cost. The cost can be negotiated. We promise to refund it in the bulk order.