Roofing and Cladding screws and accessories
Teepee Products Ltd Telephone 0118 9757776
A leading manufacturer of the nylon Bi-hex cladding screw and home of the tek screw since 1994
www.claddingscrews.co.uk
BI-HEX NYLON HEAD SPECIFICATION
Complete encapsulation of a HWH screw head with a 11mm BI-HEX Nylon coloured head.
To give ultimate protection and a neat, aesthetically pleasing finish.
MECHANICAL PROPERTIES
The following results were for Teepee Products 5/16″ HWH screws with a 10.5mm flange diameter moulded over in Reading, Berkshire by Teepee Product during February 2018. Ambient average temperature 17°C to 18°C
Test samples were randomly selected from various production runs.
Please note: Tortional strength tests are carried out at regular intervals as part of our quality control procedure.
Note: Figures are average test results and are ultimate failure loads. No safety factors have been taken into account.
Results obtained using a TW12 torque meter manufactured to ISO 6789 1992 calibration cert. no. 894004-01185 with accurate reading range 2Nm to 13.5Nm (20% to 100% of maximum torque values)
TORSIONAL STRENGTH 9.3Nm
Minimum test result 8.6Nm
MATERIAL SPECIFICATION
UV STABALISED POLYAMID 6 PA PRIM GF15/IM
Mechanical properties
| TENSILE STRENGTH | 90 N/mm2 | DIN 53455 ISO 527 |
| TENSILE ELONGATION | 5.5% | DIN 53455 ISO 527 |
| TENSILE MODULUS | 4750 N/mm2 | DIN 53455 ISO 527 |
| CHARPY NOTCHED IMPACT | 7.5 kJ/M2 | DIN 53453 ISO 179 |
| CHARPY UNNOTCHED IMPACT | 35 kJ/M2 | DIN 53453 ISO 179 |
Thermal properties
| MELTING POINT | 217-220 °C | |
|
HEAT DISTORTION TEMPERATURE METHOD A/120) |
174 °C | DIN 53481 ISO 75 |
|
VISCAT SOFTENING POINT (METHOD B/120) |
>200 °C | DIN 53460 ISO 308 |
Other properties
| GLASS FIBRE | 15% ± 2% | |
| DENSITY | 1.2 g/cm3 | DIN 53479 ISO 1183 |
