By combining Nippon Steel's special stainless steel with John Chen Screw's deficated research and development, we proudly present the revolutionary "John Tek 550 stainless steel" to the world. Witrh its high tensile strength and exceptional corrosion resistance, John Tek 550 provides a distinct competitive advantege. As type of Martensite stainless steel, John Tek 550 offers exceptional tensile strength (exceeding 1,600 N/mm2) while also providing superior corrosion resistance compared to common stainless steels. These advantages make it stand out among all stainless and carbon steels.
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TEST 01SALT SPRAY TESTresult: 8,000 Hours
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TEST 02KESTERNICH TEST100 cycles
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TEST 03HARDNESS TESTSURFACE HARDNESS：615-640 HV
CORE HARDNESS：550-565 HV
| 01 | METERIAL | John Tek 550 |
Bi-Metal |
C1022 |
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| 02 |
SIZE |
#10 | #10 | #10 | |
| 03 |
TENSILE TEST |
161.9 kgf/mm2 | 70.7 kgf/mm2 | 132.4 kgf/mm2 | |
| 04 | SALT SPRAY TEST REPORT | 8,000-15,000 hours |
ZINC+WAXING | RUSPERT | ZINC |
| 24 HRS(5μ) 72 HRS(8μ) |
240~1,000 HRS | 24~48 HRS(5μ) 48~120 HRS(8μ) |
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MORE JOHNTEK 550 PRODUCT
Standard parts and customized parts
Tapping screw
JOHNTEK 550
For solar panel. Specially designed tapping end with outstanding drilling speed. 100% drilling through two metal plates within one second, ensuring an efficient and safe workplace.
↓↓↓Check our video for M6X27 tapping screw↓↓↓
Video
rOOFING SCREW
JOHNTEK 550
No need to worry about the replacing of screws because it will last longer than your buildings.
↓↓↓Drilling test↓↓↓
Video
ETA certificate
(European Technical Assessment)
JOHN TEK 550 screw has been certified by ETA in 2022
Trade name of the construction product: JC self drilling screw
Product Fastening screws for metal members and sheeting.
