Stainless Steel Expansion Bolts Expansion Screws

Stainless Steel Expansion Bolts Expansion Screws

Stainless steel expansion bolts expansion screws Product Description : Expansion screws are generally referred to as metal expansion screws. The expansion screws are fixed by the wedge-shaped inclination to promote the expansion of the frictional gripping force to achieve a fixed effect. The...
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Product Details

Stainless steel expansion bolts expansion screws 

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Product Description

Expansion screws are generally referred to as metal expansion screws. The expansion screws are fixed by the wedge-shaped inclination to promote the expansion of the frictional gripping force to achieve a fixed effect. The screw has a thread at one end and a taper at the end.

 

The outer bread is a tin (some steel pipes), the iron cylinder (steel pipe) has a few cuts in half, and they are stuffed together into the hole in the wall, then the nut is locked, the nut is pulled outward, and the taper is pulled into the iron cylinder.

 

The iron cylinder is opened, so it is tightly fixed on the wall and is generally used for fastening the fence, awning, air conditioner and the like on cement, brick and the like. However, its fixing is not very reliable. If the load has a large vibration, looseness may occur, so it is not recommended to install a ceiling fan.

Fixed principle

The expansion screw is composed of a screw and an expansion tube. The tail of the screw is conical, and the inner diameter of the cone is larger than the inner diameter of the expansion tube. When the nut is tightened

 

When the screw moves outward, the conical portion is moved by the axial movement of the thread, thereby forming a large positive pressure on the outer circumferential surface of the expansion tube, and the angle of the cone is small, thereby forming a wall, an expansion tube and a cone. The friction is self-locking and thus achieves a fixed effect.

 

The spring pad on the expansion screw is a standard part. Because its opening is staggered and elastic, it is called a spring washer. The function of the spring washer is to pierce the nut and the pad with the sharp corner of the wrong mouth to prevent the nut from loosening.

 

The flat pad is also a standard part, and its function is to evenly distribute the pressure of the nut on the connected parts.

Products size (Unit:mm)

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Spec

Total length L

Casing length  l

Screw diameter D

Casing diameter d

Punch size

M6*50

50

35

6

8

8mm

Drill hole punch

M6*60

60

40

6

8

M6*70

70

50

6

8

M6*80

80

55

6

8

M6*100

100

80

6

8


M8*60

60

40

8

10

10mm

Drill hole punch

M8*70

70

50

8

10

M8*80

80

55

8

10

M8*90

90

65

8

10

M8*100

100

70

8

10

M8*120

120

90

8

10

M8*150

150

120

8

10


M10*60

60

35

10

12

12mm

Drill hole punch

M10*70

70

45

10

12

M10*80

80

55

10

12

M10*90

90

60

10

12

M10*100

100

75

10

12

M10*110

110

85

10

12

M10*120

120

90

10

12

M10*150

150

120

10

12


M12*80

80

50

12

16

16mm

Drill hole punch

M12*90

90

60

12

16

M12*100

100

70

12

16

M12*110

110

80

12

16

M12*120

120

90

12

16

M12*150

150

120

12

16


M14*100

100

60

14

18

18mm

Drill hole punch

M14*120

120

80

14

18

M14*150

150

100

14

18


M16*100

100

60

16

20

20mm

Drill hole punch

M16*120

120

80

16

20

M16*150

150

100

16

20

M16*200

200

150

16

20


M20*100

100

40

20

25

25mm

Drill hole punch

M20*120

120

65

20

25

M20*150

150

82

20

25

M20*200

200

133

20

25

M20*250

250

180

20

25



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