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A platform for research: civil engineering, architecture and urbanism
Self drilling screw
C:\NRPOrbl\DCCIPLB\Z678286_ LDOC.190/)2lO 10 A self-drilling screw for fastening sheet metal roofing or other cladding to wood or metal, has a buttress thread in which the trailing flank of the thread is inclined at a greater angle 5 to the axis of the screw shank than is the leading flank. The thread crest is sharp with a width of no more than substantially 0.25mm which enables the thread to tap into all timbers ranging from soft to ultra hard. The thread form also enables the thread to drive into thick steel battens while retaining good pull-out strength when driven into thin metal battens due to the effect of the buttress thread.
Self drilling screw
C:\NRPOrbl\DCCIPLB\Z678286_ LDOC.190/)2lO 10 A self-drilling screw for fastening sheet metal roofing or other cladding to wood or metal, has a buttress thread in which the trailing flank of the thread is inclined at a greater angle 5 to the axis of the screw shank than is the leading flank. The thread crest is sharp with a width of no more than substantially 0.25mm which enables the thread to tap into all timbers ranging from soft to ultra hard. The thread form also enables the thread to drive into thick steel battens while retaining good pull-out strength when driven into thin metal battens due to the effect of the buttress thread.
Self drilling screw
COLLINSON DAVID (author) / MALLET JOHN (author)
2015-07-02
Patent
Electronic Resource
English
IPC:
F16B
DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES
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Vorrichtungen zum Befestigen oder Sichern von Konstruktionselementen oder Maschinenteilen, z.B. Nägel, Bolzen, Schrauben, Sprengringe, Klemmen, Klammern oder Keile
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E04D
ROOF COVERINGS
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Dacheindeckungen
Self-drilling screw -- New fastening device
| Engineering Index Backfile | 1965
Self-Drilling Screw Joints for Cold-Formed Channel Portal Frames
| British Library Conference Proceedings | 2002