WITH NIPPON STEEL'S SPECIAL STAINLESS STEEL, COMBINED WITH JOHN CHEN SCREW'S DEDICATED RESEARCH AND DEVELOPMENT, WE PROUDLY PRESENT THE REVOLUTIONARY "STAINLESS STEEL JOHNTEK 550" TO THE WORLD. BOASTING HIGH TENSILE STRENGTH AND EXCEPTIONAL CORROSION RESISTANCE, JOHNTEK 550 OFFERS A DISTINCT COMPETITIVE EDGE.
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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：620-635 HV
CORE HARDNESS：559-563 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.
