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High strength stainless steel bolt BUMAXⓇ Hexagonal nut-BUMAX hexagonal nut M6
High strength stainless steel bolt BUMAXⓇ Hexagonal nut-Nakajima Koki Co., Ltd.

High strength stainless steel bolt BUMAXⓇ Hexagonal nut
Nakajima Koki Co., Ltd.

Nakajima Koki Co., Ltd.'s Response Status

Response Rate

100.0%

Response Time

48.3hours


About This Product

BUMAX is a high-strength stainless steel bolt developed for the purpose of design improvement (downsizing and weight reduction). We use Swedish austenitic steel SUS316L material, without heat treatment, and through heading and rolling during the bolt manufacturing process, we have ensured a strength of 8.8 and 10.9, equivalent to that of steel bolts.

■High strength: 4 times the proof strength of SUS304 (A2-50) and 2 times that of SUS316 (A4-70)

Although it is made of stainless steel, BUMAX satisfies the same strength class 10.9 as steel bolts, and is four times stronger and twice as strong (yield strength ). BUMAX has been able to downsize the 20mm diameter bolt design of SUS304 (A2-50) to 10mm diameter, achieving a weight reduction of one-fourth.

■Corrosion resistance: No corrosion occurred even after 10 years of testing in marine environment.

BUMAX has obtained better results than SUS after 10 years of atmospheric exposure in coastal areas, and has proven three times more corrosion resistant than SUS316 in a 20% sulfuric acid corrosion test. Guaranteed 30 years of corrosion resistance even when used on ships exposed to the sea. We guarantee overwhelming corrosion resistance that surpasses other stainless steel bolts.

■Heat resistance: Guaranteed maximum operating temperature in the atmosphere of 600℃

SUS304/SUS316 can normally be used up to 400℃, but BUMAX can be used up to 600℃, which is 50% higher. For stainless steel bolts whose strength is increased by heat treating martensitic materials, the maximum operating temperature is set at 200℃, one-third of BUMAX. Here too, the high-strength stainless steel bolt BUMAX exhibits outstanding heat resistance compared to all stainless steel bolts.

■Specifications

・Product standards: ISO-4032, JIS B1182, JIS B 1190 ・Material: A4-SS 2343 316L HiMo ・Thread standards: ISO 261/262, JIS B0205/B0209 ・Thread accuracy: 6H ・Strength class: Class 80, Class 100 ・Guaranteed load: 800N/mm2, 1,000N/mm2 <Note> The flat diameter (opposite side) of M10, M12, and M14 is the new JIS. It is 1mm smaller than the old JIS product. *Items are made to order.

  • Product

    High strength stainless steel bolt BUMAXⓇ Hexagonal nut

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9 Models of High strength stainless steel bolt BUMAXⓇ Hexagonal nut

Click on the part number for more information about each product

Image Part Number Price (excluding tax) Height (Hex) m Min. (mm) Height (Hex) m Max. (mm) Hole surface diameter da Min. (mm) Hole surface diameter da Max. (mm) Effective cross-sectional area (mm2) Seat diameter dw Min. (mm) Flat diameter (opposite side) s Min. (mm) Flat diameter (opposite side) s Max. (mm) Diagonal e Min. (mm) Nominal diameter d (mm) Pitch p (mm) Height (flange) m Min. (mm) Height (flange) m Max. (mm) Flange diameter dc Max. (mm)
High strength stainless steel bolt BUMAXⓇ Hexagonal nut-Part Number-BUMAX hexagonal nut M6

BUMAX hexagonal nut M6

Available upon quote

4.9

5.2

6

6.75

20.1

8.88

9.78

10

11.05

M6

1

5.7

6

14.2

High strength stainless steel bolt BUMAXⓇ Hexagonal nut-Part Number-BUMAX hexagon nut M8

BUMAX hexagon nut M8

Available upon quote

6.44

6.8

8

8.75

36.6

11.63

12.73

13

14.38

M8

1.25

7.64

8

17.9

High strength stainless steel bolt BUMAXⓇ Hexagonal nut-Part Number-BUMAX hexagon nut M10

BUMAX hexagon nut M10

Available upon quote

8.04

8.4

10

10.8

58

14.63

15.73

16

17.77

M10

1.5

9.64

10

2

High strength stainless steel bolt BUMAXⓇ Hexagonal nut-Part Number-BUMAX hexagon nut M12

BUMAX hexagon nut M12

Available upon quote

10.37

10.8

12

13

84.3

16.63

17.73

18

20.03

M12

1.75

11.57

12

26

High strength stainless steel bolt BUMAXⓇ Hexagonal nut-Part Number-BUMAX hexagonal nut M14*

BUMAX hexagonal nut M14*

Available upon quote

12.1

12.8

14

15.1

115

19.64

20.67

21

23.36

M14

2

- - -
High strength stainless steel bolt BUMAXⓇ Hexagonal nut-Part Number-BUMAX Hex Nut M16

BUMAX Hex Nut M16

Available upon quote

14.1

14.8

16

17.3

157

22.49

23.67

Twenty four

26.75

M16

2

15.3

16

34.5

High strength stainless steel bolt BUMAXⓇ Hexagonal nut-Part Number-BUMAX Hex Nut M18*

BUMAX Hex Nut M18*

Available upon quote

15.1

15.8

18

19.5

192

24.85

26.16

27

29.56

M18

2.5

- - -
High strength stainless steel bolt BUMAXⓇ Hexagonal nut-Part Number-BUMAX hexagon nut M20

BUMAX hexagon nut M20

Available upon quote

16.9

18

20

21.6

245

27.7

29.16

30

32.95

M20

2.5

18.7

20

42.8

High strength stainless steel bolt BUMAXⓇ Hexagonal nut-Part Number-BUMAX hexagonal nut M24*

BUMAX hexagonal nut M24*

Available upon quote

20.2

21.5

Twenty four

25.9

353

33.25

35

36

39.55

M24

3

- - -

Click on the part number for more information about each product

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About Company Handling This Product

Response Rate

100.0%


Response Time

48.3hrs

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