Technical conditions of screw products

Screw Products Name

Screw Products Grade

Thread Tolerance

Material And Performance Level

Finish

slotted cylinder head screw ① (GB/T 65—2000)

grade A

6 g

carbon steel：4.8、5.8

1）cleaning
2）plating

stainless steel ： A2-50、A2-70

Simple processing

Non-ferrous metal：CU2、CU3、AL4

slotted pan head screw ① (GB/T 67—2000)

grade A

6 g

carbon steel：4.8、5.8

1）cleaning
2）plating

stainless steel ： A2-50、A2-70

Simple processing

Non-ferrous metal：CU2、CU3、AL4

slotted flat countersunk head screw ① (GB/T 68—2000)

grade A

6 g

carbon steel：4.8、5.8

1）cleaning
2）plating

stainless steel ： A2-50、A2-70

Simple processing

Non-ferrous metal：CU2、CU3、AL4

slotted raised countersunk head screw ① (GB/T 69—2000)

grade A

6 g

carbon steel：4.8、5.8

1）cleaning
2）plating

stainless steel ： A2-50、A2-70

Simple processing

Non-ferrous metal：CU2、CU3、AL4

slotted 大cylinder head screw (GB/T 833—1988)

grade A

6 g

carbon steel：4.8

1）cleaning
2）galvanized passivation

stainless steel ： Al-50、 C4-50

cleaning

phillips cylinder head screw ① (GB/T 822—2000)

grade A

6 g

carbon steel：4.8、5.8

1）cleaning
2）plating

stainless steel ： A2-70

Simple processing

Non-ferrous metal：CU2、CU3、AL4

phillips pan head screw ① (GB/T 818—2000)

grade A

carbon steel：4.8

1）cleaning
2）plating

stainless steel： A2-50、 A2-70

Simple processing

Non-ferrous metal：CU2、CU3、AL4

phillips pan head screw ① (GB/T 823—1988)

grade A

6 g

carbon steel：4.8

1）cleaning
2）galvanized passivation

stainless steel ： Al-50, C4-50

cleaning

phillips flat countersunk head screw ：carbon steel 4.8① (GB/T 819.1—2000)

grade A

6 g

carbon steel：4.8

1）cleaning
2）plating

phillips flat countersunk head screw：carbon steel8.8、stainless steel A2-70和Non-ferrous metal CU2or CU3① (GB/T 819.2—1997)

grade A

carbon steel：8.8

1）cleaningor Simple processing
2）galvanized passivation

stainless steel ： A2-70

cleaning

Non-ferrous metal： CU2、CU3

phillips raised countersunk head screw ① (GB/T 820—2000)

grade A

6 g

carbon steel：4.8

1）cleaning
2）plating

stainless steel ：A2-50, A2-70 ：

Simple processing

Non-ferrous metal：CU2、CU3、AI4

Precision machanical fastener phillips screw (GB/T 13806.1—1992)

Grade A and F

M1.2、M1.4：4h；M1.6-M3：6g

carbon steel：Q215

1）cleaning
2）Oxidation
3）galvanized passivation

copper：H68, HPb59-l

hexagon socket cylinder head screw ① (GB/T 70.1—2000)

grade A

12.9： 5g6g Other grade：6g

carbon steel：
d＜3：according to agreement
3≤d≤39：8.8、10.9、12.9;
3≤d≤16：9.8；
d＞39：according to agreement

1）Oxidation
2）plating
3）Non-electrolytic zinc powder coating

stainless steel ：
d≤24： A2-70、A4-70；
24＜d≤39：A2-50、A4-50；
d＞39：according to agreement

Simple processing

Non-ferrous metal：CU2、CU3

hexagon socket button head screw ① (GB/T 70.2—2000)

grade A

12.9：5g6g Other grade：6 g

carbon steel：8.8、 10.9、 12.9

1）Oxidation
2）plating
3）Non-electrolytic zinc powder coating

hexagon socket flat countersunk head screw ① (GB/T 70.3—2000)

grade A

12.9：5g6g other grade：6 g

carbon steel：8.8、 10.9、 12.9

1）Oxidation
2）plating
3）Non-electrolytic zinc powder coating

hexagon socket cylinder head shoulder screw ① (GB/T 5281—1985)

grade A

5 g6 g

carbon steel：12.9②

1）Oxidation
2）galvanized passivation

hexagon socket torx flat countersunk head screw ① (GB/T 2673—1986)

grade A

carbon steel：4.8

1）cleaning
2）galvanized passivation

slotted flat countersunk head waisted shank screwscrew (GB/T 948—1988)

grade A

6 g

carbon steel：4.8

1）cleaning
2）galvanized passivation

stainless steel ： Al-50、 C4-50

cleaning

slotted raised countersunk head waisted shank screwscrew (GB/T 949—1988)

grade A

6 g

carbon steel：4.8

1）cleaning
2）galvanized passivation

stainless steel ： Al-50、C4-50

cleaning

hexagon head waisted shank screwscrew (GB/T 838—1988)

grade A

carbon steel：4.8

1）cleaning
2）galvanized passivation

stainless steel ： Al-50、 C4-50

cleaning

knurled thumb head waisted shank screwscrew (GB/T 839—1988)

grade A

6 g

carbon steel：4.8

1）cleaning
2）galvanized passivation

stainless steel ： Al-50、C4-50

cleaning

slotted cylinder head shoulder screw (GB/T 830—1988)

grade A

6 g

carbon steel：4.8

1）cleaning
2）galvanized passivation

Stainless steel： Al-50、C4-50

cleaning

slotted headless shoulder screw (GB/T 831—1988)

grade A

6 g

carbon steel：14H

1）cleaning
2）galvanized passivation

stainless steel ： Al-50、 C4-50

cleaning

knurled head screw (GB/T 834—1988)

grade A

6 g

carbon steel：4.8

1）cleaning
2）galvanized passivation

stainless steel ： Al-50、 C4-50

cleaning

knurled head ultra low head screw (GB/T 835—1988)

grade A

6 g

carbon steel：4.8

1）cleaning
2）galvanized passivation

stainless steel ： Al-50、C4-50

cleaning

Knurled thumb head screw (GB/T 836—1988)

grade A

6 g

carbon steel：4.8

1）cleaning
2）galvanized passivation

stainless steel ： Al-50、C4-50

cleaning

Plastic knurled thumb head screw ① (GB/T 840—1988)

—

6 g

carbon steel（shank）：
A type：14H;
B type：33H

1）Oxidation
2）galvanized passivation

ABS plastic（head type）

eye screw ① (GB/T 825—1988)

—

carbon steel：20、25 normalizing

1）cleaning
2）galvanized passivation
3）chrome plating

①commodity fasteners, should be preferred.
②shoulder screw products can not withstand the tensile test due to structural reasons, but other performance requirements specified in GB/T3098, 1 to 12.9 should be achieved.

If you want to know more about screw products technology, feel free to consult: annie.li@szsst88.com

9月-29-2018

kalyn

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Technical conditions of screw products