# Category: Fasteners - [INDEX TN4S: four-segment universal plug for different types of masonry](https://menet-trend.hu/en/nonox-world/index-tn4s-four-segment-universal-plug.md) — Four-segment PA6 nylon plug for concrete, brick, hollow masonry and plasterboard: how it works, sizes 5–14 mm, service temperature −40…+70 °C. - [Fixing hollow sections from one side – without welding](https://menet-trend.hu/en/nonox-world/fixing-hollow-sections-from-one-side-without-welding.md) — ETA-assessed mechanical connection for hollow steel sections, in sizes M6–M20. - [Concrete screws in practice – What can ATLANTIS-coated INDEX concrete screws do?](https://menet-trend.hu/en/nonox-world/concrete-screws-in-practice-what-can-atlantis-coated-index-concrete-screws-do.md) — A concrete screw cuts its own thread into a pre-drilled hole: no separate wall plug, no expansion, no curing time, and it can be dismantled again. The ATLANTIS coating is not stainless, but zinc, passivation and epoxy give it C3-H protection without hydrogen embrittlement. Plus why L ≥ tfix + hnom matters. - [NONOX stainless “Opel-head” self-tapping screws in practice](https://menet-trend.hu/en/nonox-world/nonox-stainless-opel-head-self-tapping-screws-in-practice.md) — The head is formed as if a washer sat under it, except that it is one piece. It bears over a large surface and — the detail rarely mentioned — already grips when only half-tightened, which is exactly what slotted holes and adjustable cladding need. Where the environment is wet, stainless earns its place. - [Opel screws in practice – through the eyes of a set designer](https://menet-trend.hu/en/nonox-world/opel-screws-in-practice-through-the-eyes-of-a-set-designer.md) — Thirty-three years among glue, paint and sawdust. A set has to be carried, pushed and fixed in the dark, and if something does not hold, that is not an aesthetic question. A set designer explains why wide-headed flat screws — the ones people call Opel screws — earned a place among her favourites. - [The self-drilling bi-metal screw that saves you time and money](https://menet-trend.hu/en/nonox-world/the-self-drilling-bi-metal-screw-that-saves-you-time-and-money.md) — A hardened carbon steel tip welded to a stainless steel body: the bi-metal self-drilling screw drills and fastens in a single operation, with no pre-drilling, while keeping its corrosion resistance at the surface. Why a plain stainless self-drilling screw cannot do the job, and where the bi-metal version pays for itself. - [Annoying screws](https://menet-trend.hu/en/nonox-world/annoying-screws.md) — Armchairs with faulty inserts, a scooter handlebar coming loose in the rider's hands, a fence whose screws rotted in — a first-person account of what happens when the cheapest part of an expensive product is the screw that holds it together. - [Pipe clamp](https://menet-trend.hu/en/nonox-world/pipe-clamp.md) — A pipe clamp is a pipe clamp – or is it? Galvanised clamps are fine for heating, gas and water pipes, but food, chemical and energy plants demand stainless. NONOX A2 clamps are made from 1,8-1,9 mm stainless steel with stiffening ribs and bear up to 150 kg – plain or rubber-lined, in many sizes. - [The compressed history of the pop rivet](https://menet-trend.hu/en/nonox-world/the-compressed-history-of-the-pop-rivet.md) — Where would you need “some sort of pop rivets”? Blind rivets were born in aircraft manufacturing, and the name comes from the English Tucker company's brand. How the mandrel upsets the tube, why cold-formed rivets no longer crack, and why NONOX A2 and A4 are the professional choice outdoors. - [What a screw ought to know about nuts](https://menet-trend.hu/en/nonox-world/what-a-screw-ought-to-know-about-nuts.md) — A field guide to nuts: the standard hex (DIN 934), hand-tightened wing and butterfly nuts, closed cap nuts, flanged and combi nuts that replace a washer, tall and coupling nuts, weld nuts, rivet nuts and their setting tool, screw-in inserts for wood, and press-fit nuts for thin sheet. - [Screw locking: life insurance](https://menet-trend.hu/en/nonox-world/screw-locking-life-insurance.md) — Why a releasable joint still needs securing, and the clever elements that do it: spring, nosed and toothed washers, the two-tab locking plate, double nuts, the split pin and castle nut, plastic-insert and all-metal self-locking nuts, and the spring-steel lock nut the Eiffel Tower was assembled with. - [For concrete, a concrete screw](https://menet-trend.hu/en/nonox-world/for-concrete-a-concrete-screw.md) — How the concrete screw replaced the wall plug: pre-drill, and the carbide tip cuts its own thread into the concrete. Why the hole must be a shade larger than the core diameter, why NONOX A4 belongs outdoors while galvanised stays inside, and the hex, countersunk and stud versions. - [Fully threaded hex-head bolt in stainless (A2) and acid-resistant (A4) versions](https://menet-trend.hu/en/nonox-world/fully-threaded-hex-head-bolt-in-stainless-a2-and-acid-resistant-a4-versions.md) — Our most widespread NONOX stainless and acid-resistant bolt, with the largest size range, but mind that hex-head lengths are understood without the head. Rolled threads, cold-forged heads, ordering examples, typical fields of application, and a warning about galling between austenitic bolts and nuts of the same grade. - [Anchor bolts](https://menet-trend.hu/en/nonox-world/anchor-bolts.md) — Two ways to anchor into concrete and stone: the internally threaded drive-in wedge anchor, which a wedge expands along its slot, and the ring anchor bolt, which grips harder the more you tighten the nut. Both in NONOX stainless (A2) and acid-resistant (A4), M6 – M24, available from stock. - [This screw is a bit loose around the waist…](https://menet-trend.hu/en/nonox-world/this-screw-is-a-bit-loose-around-the-waist.md) — Off-the-peg does not fit everyone. We offer more than 35 thousand kinds of NONOX stainless fastener, but when none of them fits, we simply take the measurements: a short note on ordering a custom fastener. - [What is a rivet nut for?](https://menet-trend.hu/en/nonox-world/what-is-a-rivet-nut-for.md) — Fastening to sheet, tube or hollow section without cutting a thread or welding a nut on. How the rivet nut works like a blind rivet, how to set the tool up, how to size it, and the open, closed, countersunk and micro-flange types in aluminium, steel and NONOX stainless. - [The “underdog” — why do we need a washer here?!](https://menet-trend.hu/en/nonox-world/the-underdog-why-do-we-need-a-washer-here.md) — A washer spreads the load, like a ski on snow, and protects the finished surface. Wood construction, thick, decorative, body, sealing, contact and beam washers, plus the captive washer and the combi nut: which one belongs where, and why the material grade must never be the place you economise. - [The history of riveting, or how we stitched metal together before welding](https://menet-trend.hu/en/nonox-world/the-history-of-riveting-or-how-we-stitched-metal-together-before-welding.md) — The rivet joined metal before welding took over: bridges, boilers, ships and building frames. How the factory head, the glowing rivet and the blacksmith's catching funnel worked together, plus the special rivets still in use today, from tubular and POP rivets to drive chains and aircraft skins. - [Bi-metal*, self-drilling, NONOX self-tapping screws](https://menet-trend.hu/en/nonox-world/bi-metal-self-drilling-nonox-self-tapping-screws.md) — Ideal for mounting steel or aluminium profiles and sandwich panels onto steel or aluminium structures, with no pre-drilling. An A2 stainless body friction-welded to a hardened steel drill point, a flanged hexagon head, and a captive conical spring washer with a vulcanised EPDM seal that keeps the fixing watertight. - [Self-drilling bi-metal*, NONOX self-tapping screw, for thin sheets](https://menet-trend.hu/en/nonox-world/self-drilling-bi-metal-nonox-self-tapping-screw-for-thin-sheets.md) — Drilling, thread forming and fastening in one step, even into stainless sheet. The bi-metal NONOX self-tapping screw pairs an A2 stainless body with a friction-welded hardened steel point that forms the thread without cutting chips, giving 50% more holding force and needing fewer fixing points. - [Guide to determining the pre-drilling needed for self-tapping screws](https://menet-trend.hu/en/nonox-world/guide-to-determining-the-pre-drilling-needed-for-self-tapping-screws.md) — The diameter of the pre-drilling always falls between the core diameter and the nominal diameter of the screw. Sheet thickness, sheet material and the drilling technology all shift it. Always carry out a trial before beginning mass production. - [What screws should I take to the Moon?](https://menet-trend.hu/en/nonox-world/what-screws-should-i-take-to-the-moon.md) — Whether civilisations unknown to us exist is not a question for me. Where there are components, they must be fixed to one another - so screws must exist elsewhere too. But on the Moon there is no industry yet: everything has to be taken from here, from Earth. - [Everything you need to know about threaded rods](https://menet-trend.hu/en/nonox-world/everything-you-need-to-know-about-threaded-rods.md) — Some sell screws by the piece, some by the kilo. Threaded rod, however, is customarily asked for by the metre. Economical cutting, cut-to-size ordering, trapezoidal threads, welding, galling - and why the stainless version's 700 N/mm2 beats the traditional 4.6. - [Special screw heads I.](https://menet-trend.hu/en/nonox-world/special-screw-heads-i.md) — Screws hold together the greater part of the man-made world, and the most striking difference between them shows itself in their head design. Hex-head bolts, cylindrical head hex socket screws, headless screws and grub screws, countersunk, raised countersunk and “D” head screws. - [Storm-proof tile fixing with a “tinsmith’s” screw. A simple, safe and cheap solution](https://menet-trend.hu/en/nonox-world/storm-proof-tile-fixing-with-a-tinsmiths-screw-a-simple-safe-and-cheap-solution.md) — The suction effect of the wind can reach 4-5 times the dead weight of the roofing material. The storm clip costs about as much as the tile itself; nailing holds only the top third. The tinsmith's screw is simple, cheap and the most aesthetic solution. - [Security screws](https://menet-trend.hu/en/nonox-world/security-screws.md) — Man created the screw, and with it the problem. Security screws can only be fitted with a special purpose-made tool. Snake-eye, pin Torx, triangle-head, McGard and one-way screws, security nuts - and the cheapest security screw of all, the carriage bolt. - [Installing solar collectors and solar panels by replacing the factory mounting frame](https://menet-trend.hu/en/nonox-world/installing-solar-collectors-and-solar-panels-by-replacing-the-factory-mounting-frame.md) — The price of factory mounting frames is rather steep. Replacing them requires some thought, but it is by no means an insoluble task: the fixing must withstand +100ºC and -20ºC, frost, damp and wind, and must stay releasable after 10-20 years. --- HTML: