Following the announcement by the Prime Minister on 23rd March, to protect our staff and the vulnerable we will be closing our business at 5.00 PM today (24th March) until further notice. Some staff will be working from home with but no despatches will be possible unless critical medical supplies.

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COVID-19 To support the Government in the fight against COVID-19 we are closing the business today until further no… https://t.co/sEg7UxZ8N4 24th Mar 2020

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A good example of the importance of not only specifying the correct fastener but using the correct one in productio… https://t.co/B9Sfh6Xm2m 05th Feb 2020

Polyplast 30 Hex Washer Head

Series 20210 Type: 1447

Substitute the length for the L In the part no. to specify the exact part required. The 30 deg. Flank angle and recessed core diameter of these thread forming screws for plastic have been developed following theoretical appraisal, exhaustive calculations and final proof testing. The 30 deg. Flank angle produces low radial forces when engaging the plastic, therefore resulting in less radial stresses and tension. In other words the hoop stresses in the plastic bosses are less than those experienced with conventional screws. The recessed core geometry provides the ideal flow director for the displaced plastic, encouraging a uniform flow to fill the pitch of the screw without material jamming. This results in the maximum amount of plastic being engaged to provide higher sheer loads, due to the increased bearing depth of the thread. A combination of the above and the ease of penetration of the 30 deg. Flank angle through the material and the way in which the plastic flows, reduces the torque required to drive the screw in. This fact therefore increases the margin between drive torque and stripping torque which of course minimises the potential of stripping during installation. The optimum pitch and maximum fill features provided by the recessed core results in a large area of plastic to be sheered prior to screw failure in tension. This creates a high resistance to pullout loads.

PART NO.DIAM. D1DIAM. D2PITCH PX MAXX MIN.A.F. SWHEAD HEIGHT KFLANGE DIA. DFLANGE HEIGHT S
1447K 30XL3.01.661.343.01.55.02.36.500.6
1447K 35XL3.51.911.573.51.85.52.87.000.7
1447K 40XL4.02.171.794.02.05.52.88.000.8
1447K 50XL5.02.682.245.02.57.03.510.00.8
1447K 60XL6.03.192.696.03.08.04.212.01.0
1447K 70XL7.03.703.147.03.58.05.014.01.2
1447K 80XL8.04.213.598.04.010.06.016.01.2
1447K 100XL10.05.234.4910.05.013.07.018.01.5
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About Series: Series 20210 Type: 1447
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