Nuts

What are nuts?

Nuts are parts that connect machinery and equipment closely, through the inner threads, the same specification nuts and bolts can be connected together.

Nuts and bolts or screws screwed together to play a role in fastening parts, all production and manufacturing machinery must be used in a component according to the different materials, divided into carbon steel, stainless steel, non-ferrous metals (such as copper) and other major types.

What are the standard nut bases?

Nuts based on attributes are mainly national standards (GB), German standards (DIN), international standards (ISO), Japanese standards (JIS), American standards (ASTM/ANSI), and other standards.

Among them, the national standard, German standard, Japanese standard with M said (for example, M8, M16), the American system and the British system is used for fractions or # expressed specifications (such as 8 #, 10 #, 1/4, 3/8).

Commonly used national standards for nuts are as the below.

GB41 Ⅰ type hexagonal nuts – C grade

GB6170 Ⅰ type hexagonal nuts – A, B grade

GB6171 Ⅰ type hexagon nuts – fine teeth – A, B grade

GB6172 Hexagon thin nuts–Grade A, B-chamfered

GB6173 Hexagon thin nuts-fine teeth-A, B grade

GB6174 Hexagon thin nuts – Grade B – no chamfering

GB6175ⅡHexagon nuts–Grades A and B

GB6176Ⅱhexagon nuts-fine teeth-Grade A, B

GB6177 Hexagon flange face grade A

GB55 Hexagon thick nuts

GB56 Hexagon extra thick nuts

GB1229 large hexagon nuts (high strength for steel structure)

What are the materials for making nuts?

The raw materials are carbon steel, stainless steel, copper, alloy, etc.

Stainless steel nuts

Hexagon nuts (GB6170/DIN934), thin nuts (GB6172/DIN439), heavy-duty nuts (metric, U.S.), nylon lock nuts (DIN985-DIN982 thick), all-metal lock nuts (DIN980M), cap nuts (DIN1587), flange face nuts (GB6177/DIN6923), flange face nut nylon lock nut (DIN6926), four-corner welded nut (DIN928), hexagonal welded nut (DIN929), butterfly cap (GB62, DIN315, U.S. system), K cap and so on. Specification: M1.6-M64

Alloy steel nuts

Hexagon nuts (GB6170/DIN934, GB6175), flange face nuts (GB6177/DIN6923)

Round nuts (GB812), small round nuts (GB810), U.S. square nuts, U.S. hexagonal nuts (ANSI/ASME B18.2.2), heavy-duty nuts (metric, U.S.). Specification: 5/16-4”.

What are the nut specifications?

The nut specification table is a specific and detailed way to standardize the various types of nuts and break down some of the specifications of the nuts in a table.

There are many types of nuts and different materials. Each type of nut has different specifications, and each type of screw also has its mechanical properties and role.

– Square nuts C grade GB 39-88

– Hexagonal nuts C grade GB /T41-2000

– Hexagonal thick nuts GB 56-88

– Butterfly nut GB 62-88

– Ring nut GB 63-88

– Combined cap nuts GB 802-88

– Spherical hexagonal nuts GB 804-88

– Fastening nuts GB 805-88

– Knurled high nuts GB 806-88

– Knurled thin nuts GB 807-88

– Small hexagonal extra flat fine tooth nuts GB 808-88

– Inserted round nuts GB 809-88

– Small round nuts GB 810-88

– Round nuts GB 812-88

– Round nuts with holes in the end GB 815-88

– Side round nuts with holes GB 816-88

– Slotted round nuts GB 817-88

– Type 1 non-metallic insert hexagonal lock nut GB /T 889.1-2000

– Type 1 non-metallic insert hexagonal lock nut fine teeth GB /T 889.2-2000

– Cap nuts GB 923-88

– Type 1 hexagon nuts GB /T 6170-2000

– Type 1 hexagon nuts fine teeth GB /T 6171-2000

– Hexagonal thin nuts GB /T 6172.1-2000

– Non-metallic insert hexagonal locking thin nuts GB /T 6072.2-2000

– Hexagonal thin nuts fine teeth GB /T 6173-2000

– Hexagonal thin nuts without chamfer GB /T 6174-2000

– Type 2 hexagon nuts GB /T 6175-2000

– Type 2 hexagon nuts with fine teeth GB /T 6176-2000

– Hexagonal flange nuts GB /T 6177.1-2000

– Hexagonal flange face nuts with fine teeth GB /T 6177.2-2000

– Hexagon slotted nuts type 1-A and B GB 6178-86

– Hexagon slotted nuts type 1-Grade C GB 6179-86

– Type 2 hexagon slotted nuts-Grade A and B GB 6180-86

– Hexagon slotted thin grade A and B GB 6181-86

– Non-metallic insert hexagonal lock nuts type 2 GB /T 6182-2000

– Non-metallic insert hexagonal flange face lock nuts GB /T 6183.1-2000

– Non-metallic insert hexagon flange lock nut fine teeth GB /T 6183.2-2000
– Type 1 all-metal hexagonal lock nut GB /T 6184-2000

– Type 2 all-metal hexagonal lock nuts GB /T 6185.1-2000

– Type 2 all-metal hexagon lock nut fine teeth GB /T 6185.2-2000

– Type 2 all-metal hexagonal locknuts grade 9 GB /T 6186-2000

– All-metal hexagon flange lock nuts GB /T 6187.1-2000

– All-metal hexagon flange face locknuts with fine teeth GB /T 6187.2-2000

– Type 1 hexagon slotted nuts fine tooth A and B GB 9457-88

– Type 2 hexagon slotted nuts fine pitch A and B GB 9458-88

– Hexagon slotted thin nuts fine tooth A and B GB 9459-88

– Welded square nuts GB /T 13680-92

– Welded hexagonal nuts GB /T 13681-92

– Flat head rivet nuts GB /T 17880.1-1999

– Countersunk head rivet nut GB /T 17880.2-1999

– Small countersunk head rivet nuts GB /T 17880.3-1999

– 120° Small countersunk head rivet nuts GB /T 17880.4-1999

– Flat head hexagonal rivet nuts GB /T 17880.5-1999

– Hexagon nuts for precision machinery GB /T 18195-2000

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