Analysis of Common Model Parameters of Special Custom Screw Fasteners

As a fastener manufacturer, it is very important to know the common model parameters of special custom screw fasteners. However, many friends still can not completely grasp it. So I will analyze it today. Common model parameters of special custom screw fasteners are as follows:

1. Head type of special custom screw

B: spherical cylinder head

C: cylinder head

F (K) : countersunk head

H: hexagon head

HW: hexagon head with washer

O: oval head

P: flat head

R: half round head

PW: flat head with washer

T: large flat head

V: mushroom head

2. Heat treatment

H:Heat treatment

N: No heat treatment

3. Surface treatment

Zn:white zinc


B: blue zinc

F: black zinc

O: oxidation of black

Ni: nickel

P: phosphorization

4. Thread type of special custom screw

A: tapping pointed tail (the first kind of Japanese standard), sparse.

AB: tapping pointed tail (the fourth kind of Japanese standard), dense.

B: tapping flat tail (the second kind of Japanese standard), sparse.

C: tapping flat tail (the third kind of Japanese standard), dense.

P: double wire tooth

HL: high and low tooth

U: pineapple tooth tattoo

T: tapping flat tail cut feet

AT:self tapping pointed tail cut feet

M: mechanical tooth

Special custom screw fasteners are very common in our daily life. I hope this article can be helpful to you.

About King-Tower

Dongguan King-Tower Hardware Co., Ltd is one of the largest enterprises to produce in China. China screw manufacturer choose King-Tower. Our company produces all kinds of sem screws, safety screws, Chiacgo screws, special screws, customized screws, plastic head screws, Lathe screws, and Professional screw, to meet various standard requests from different countries. All the equipment is introduced from the United States, Japan and Taiwan. Good equipment, consummate craft and strict management enable the quality of the products and service standard to reach the level of international market.

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