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The name Molly was formerly trademarked [2] but is now often used in generic reference. Other names used for this same general type of fastener include hollow-wall anchor and hollow-door anchor , sometimes with design variations but always with the same design theme of expansion via deformation as the screw is tightened.
Similar to a wood screw, except that it is generally much larger running to lengths up to 15 in (381 mm) with diameters from 0.25–0.5 in (6.35–12.70 mm) in commonly available (hardware store) sizes (not counting larger mining and civil engineering lags and lag bolts) and it generally has a hexagonal drive head.
Robertson screwdrivers are easy to use one-handed, because the tapered socket tends to retain the screw, even if it is shaken. [3]: 85–86 They also allow the use of angled screwdrivers and trim-head screws. The socket-headed Robertson screws are self-centering and reduce cam out. They also stop a power tool when set, and can be more easily ...
Confirmat screws on a sheet of the particleboard material in which they were designed to hold. Diagram of a hex-headed confirmat screw, made to be turned with an allen key A confirmat screw holding a butt joint in melamine-coated particleboard. A specialized stepped drill bit and a screw to match it. The screw is covered with a cosmetic plastic ...
Riser clamp for a standpipe through-penetration firestop inside a fire hose cabinet under construction. A riser clamp is a type of hardware used by mechanical building trades for pipe support in vertical runs of piping (risers) at each floor level. The devices are placed around the pipe, and integral fasteners are then tightened to clamp them ...
A metric ISO screw thread is designated by the letter M followed by the value of the nominal diameter D (the maximum thread diameter) and the pitch P, both expressed in millimetres and separated by a dash or sometimes the multiplication sign, × (e.g. M8-1.25 or M8×1.25).
NKT Flexibles is a supplier of flexible pipelines for the offshore and chemical industries based in Denmark.NKT Flexibles was acquired by the Houston, Texas-based company National Oilwell Varco (renamed NOV Inc. in 2021) in 2012 for 3.8 billion kr.. [1]
ISO general purpose metric screw threads – Part 1: Nominal sizes for coarse pitch threads; nominal diameter from 1 mm to 68 mm: Active: DIN 13-2: ISO general purpose metric screw threads – Part 2: Nominal sizes for 0,2 mm, 0,25 mm and 0,35 mm fine pitch threads; nominal diameter from 1 mm to 50 mm: Active: DIN 13-3
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