Product Type

Size Specification (Thread Size × Length)

Thread Profile

Prec

ision Grade

Performance Grade

Material Type

Material Characteristics

Application Scenarios

Remarks

Hexagon Head Bolt (Full Thread)

M2×4

M2×5

M2×6

M2×8

Coarse thread (M)

6g

4.8 Grade

Carbon Steel (Q235)

Low cost, easy to process, medium strength

Light equipment fixing, furniture assembly, low-load scenarios

Full thread for length ≤12mm

M3×6

 M3×8

 M3×10

M3×12

M3×16

Coarse thread (M)

6g

4.8/8.8 Grade

Carbon Steel (Q235), Alloy Structural Steel (45#)

8.8 Grade requires heat treatment, enhanced strength

Electronic equipment, small machinery, furniture connectors

8.8 Grade with black oxide finish

M4×8

M4×10

M4×12

M4×16

M4×20

Coarse thread (M)

6g

4.8/8.8 Grade

Carbon Steel, Alloy Structural Steel, Stainless Steel (304)

Stainless steel with strong corrosion resistance

Mechanical equipment, architectural decoration, water and electricity installation

Stainless steel version for humid environments

M5×10

 M5×12

 M5×16

M5×20

M5×25

Coarse thread (M)

6g

4.8/8.8/10.9 Grade

Carbon Steel, 45# Steel, Stainless Steel (304/316)

10.9 Grade with high strength and shear resistance

Heavy machinery, auto parts, engineering structures

10.9 Grade complies with GB/T 3098.1

M6×12

M6×16

M6×20

M6×25

M6×30

Coarse thread (M)

6g

4.8/8.8/10.9 Grade

Carbon Steel, Alloy Structural Steel (40Cr), Stainless Steel 316

40Cr with good toughness

Industrial equipment, bridge supports, heavy-load fixing

Half-thread version customizable for length ≥30mm

Hexagon Head Bolt (Half Thread)

M8×16

M8×20

 M8×25

M8×30

M8×40

Coarse thread (M)

6g

8.8/10.9/12.9 Grade

45# Steel, 40Cr, Stainless Steel 316, High-temperature Alloy

12.9 Grade with ultra-high strength and heat resistance

Construction machinery, aerospace parts, high-pressure equipment

Half thread length: thread length = thread size × 1.5

M10×20

M10×25

 M10×30

M10×40

M10×50

Coarse thread (M)

6g

8.8/10.9/12.9 Grade

Alloy Structural Steel, Stainless Steel 316, Titanium Alloy

Titanium alloy with lightweight and extreme corrosion resistance

Precision machinery, marine engineering, medical equipment

Titanium alloy version with high cost

M12×25

M12×30

M12×40

 M12×50

M12×60

Coarse thread (M)

6g

8.8/10.9/12.9 Grade

40Cr, 35CrMo, Stainless Steel 316L

35CrMo with fatigue and impact resistance

Large equipment bases, building steel structures, wind power equipment

To be used with spring washers

Hexagon Socket Cap Head Bolt

M2×3

M2×4

M2×5

M2×6

Coarse thread (M)

6g

4.8/8.8 Grade

Carbon Steel, Stainless Steel 304

Hexagon socket design for anti-disassembly and aesthetics

Precision instruments, electronic equipment, mold assembly

Head diameter = thread size × 1.5

M3×5

M3×6

M3×8

M3×10

M3×12

Coarse thread (M)

6g

8.8/10.9 Grade

45# Steel, Stainless Steel 304, Alloy Structural Steel

10.9 Grade for high-load scenarios

Mechanical part fixing, auto interiors, small household appliances

Full thread for length ≤8mm

M4×6

M4×8

M4×10

M4×12

M4×16

Coarse thread (M)

6g

8.8/10.9 Grade

Stainless Steel (304/316), 40Cr

Stainless steel version with excellent rust resistance

Humid environment equipment, medical devices, food machinery

Fine thread version customizable (e.g., M4×0.7)

Hexagon Nut (Standard)

M2, M3, M4, M5, M6

Coarse thread (M)

6H

4/8 Grade

Carbon Steel (Q235), Stainless Steel 304

4 Grade for low load, 8 Grade with higher strength

Matching hexagon head bolts, general assembly scenarios

Thickness = thread size × 0.8

M8, M10, M12, M14, M16

Coarse thread (M)

6H

8/10 Grade

45# Steel, Stainless Steel (304/316), 40Cr

10 Grade requires heat treatment and deformation resistance

Heavy machinery, engineering structures, auto parts

10 Grade complies with GB/T 3098.2

Thin Hexagon Nut

M2, M3, M4, M5, M6

Coarse thread (M)

6H

4/8 Grade

Carbon Steel, Stainless Steel 304

Thin thickness, space-saving installation

Compact structure equipment, electronic component fixing

Thickness = thread size × 0.5

Lock Nut (Nylon Insert)

M2, M3, M4, M5, M6

Coarse thread (M)

6H

8 Grade

Stainless Steel (304/316), Zinc-plated Carbon Steel

Nylon ring for anti-loosening and good seismic performance

Vibration equipment, transportation tools, outdoor facilities

Operating temperature ≤100℃

M8, M10, M12, M14, M16

Coarse thread (M)

6H

8/10 Grade

Stainless Steel 316, Alloy Structural Steel

High-temperature nylon ring customizable (≤150℃)

Engine parts, mechanical equipment, bridge supports

Better anti-loosening effect than standard nuts