Quality Inspection for Socket Head Self Tapping Screws - Countersunk Hex Socket Cap Bolt – Dashan

Hexagon bolts refer to fasteners composed of heads and screws. The bolts are divided into iron bolts and stainless steel bolts according to the material. According to the grade of iron, there are 4.8 grade bolts , 8.8 grade bolts, 10.9 grade and 12.9 grade. Stainless steel bolts are made of stainless steel SUS201 bolts, SUS304 bolts, and SUS316 bolts.

Hexagon Bolt Classification:

1. According to the force mode of the connection, there are ordinary ones and those with reaming holes. The bolts used for reaming holes should be matched with the size of the holes and are used when they are subjected to lateral force.
2. According to the shape of the head, there are hexagonal head, round head, square head, countersunk head, etc. Generally, the countersunk head is used in the place where the surface is smooth without protrusion after connection, because the countersunk head can be screwed into the part. The head can also be screwed into the part. The tightening force of the square head can be larger, but the size is large. The hex head is the most commonly used.

Customer choose product should be consider as follows:

1. Selected material, material fidelity, quality assurance
2. Rust and corrosion resistance, strong and durable, complete categories
3. The thread is clear, the product has no burr, and the appearance is clean and flat
4. Simple operation, convenient and fast, saving labor cost

Q1: Can you buy a samples placing orders?
A1: Yes,we welcome sample order to test and check quality.Mixed samples are acceptable.

Q2: What’s your leading time?
A2: It depends on the order quantity and the season you place the order.-Usually we can ship within 7-15 days for small quantity, and about 30 days for large quantity.

Q3: What is your payment term?
A3: T/T,Western Union,MoneyGram,and Paypal .This is negotiable.

Q4: What is the shipping method ?
A4: It could be shippied by sea,by air or by express, You can confirm with us before order.

Q5: How do you make your business long-term and good relationship?
A5: We keep good quality, competitive price and Excellent after-sales service to ensure our customers benefit.