High strength stainless steel bolt BUMAXⓇ109 hex bolt (half thread)
Nakajima Koki Co., Ltd.

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.

■Non-magnetic: Magnetic permeability 1.006 (Bumax 88) Outstanding non-magneticOne of the characteristics of stainless steel is that it is non-magnetic. The closer the magnetic permeability is to 1.000, the more non-magnetic it is. Even SUS304 (A2-70) (which does not stick to magnets) has a magnetic permeability of 1.400, so you can see that BUMAX has excellent non-magnetic properties with a magnetic permeability of 1.006. BUMAX can be used with confidence in various precision electronic devices that require a non-magnetic environment.

Model
There are 5 models available for this product.

Product
High strength stainless steel bolt BUMAXⓇ109 hex bolt (half thread)

Handling Company
Nakajima Koki Co., Ltd.

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Fastening Components

Structural Bolts

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5 Models of High strength stainless steel bolt BUMAXⓇ109 hex bolt (half thread)

Click on the part number for more information about each product

Part Number	Price (excluding tax)	Length l 90 (kg/100)	Length l 80 (kg/100)	Length l 75 (kg/100)	Length l 70 (kg/100)	Length l 65 (kg/100)	Length l 100 (kg/100)	Length l 60 (kg/100)	Length l 55 (kg/100)	Length l 50 (kg/100)	Length l 45 (kg/100)	Length l 40 (kg/100)	Length l 35 (kg/100)
BUMAX 109 hex bolt M6 (half thread)	Available upon quote	-	1.9	1.8※	1.7	1.6※	-	-	1.4	-	1.2	1	0.92
BUMAX 109 Hex bolt M8 (half thread)	Available upon quote	-	3.6	3.3※	3.2*	3.0*	-	2.8	2.6	2.4	2.2	2	-
BUMAX 109 Hex bolt M10 (half thread)	Available upon quote	6.6	5.9	-	5.3	5	7.2*	4.7	4.4	4	3.8	-	-
BUMAX 109 Hex bolt M12 (half thread)	Available upon quote	9.2	8.4	7.7*	7.5	7.1※	10	6.7	6.3	5.8	-	-	-
BUMAX 109 Hex bolt M16 (half thread)	Available upon quote	17*	16	14.6*	14	13*	19	-	-	-	-	-	-

Click on the part number for more information about each product

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About Company Handling This Product

Nakajima Koki Co., Ltd.

Japan

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High strength stainless steel bolt BUMAXⓇ109 hex bolt (half thread) Nakajima Koki Co., Ltd.

About This Product

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

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

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

■Non-magnetic: Magnetic permeability 1.006 (Bumax 88) Outstanding non-magnetic

5 Models of High strength stainless steel bolt BUMAXⓇ109 hex bolt (half thread)

BUMAX 109 hex bolt M6 (half thread)

BUMAX 109 Hex bolt M8 (half thread)

BUMAX 109 Hex bolt M10 (half thread)

BUMAX 109 Hex bolt M12 (half thread)

BUMAX 109 Hex bolt M16 (half thread)

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High strength stainless steel bolt BUMAXⓇ109 hex bolt (half thread)
Nakajima Koki Co., Ltd.