{"product_id":"hasp-a4","title":"Hasp | A4 | M8384","description":"\u003cp\u003eDo you need a \u003cstrong\u003ehasp\u003c\/strong\u003e that works reliably even in damp, salty, or chemically harsh environments? The \u003cstrong\u003eA4 stainless steel hasp (AISI 316 acid-proof stainless steel)\u003c\/strong\u003e is built to resist corrosion and maintain its mechanical strength for a long time. It is manufactured for tough conditions, combines robust construction with long service life, and is ideally suited for both marine and industrial applications. The stable hinge design provides secure locking and prevents accidental opening, even during vibrations or movement.\u003c\/p\u003e\n\u003ch2\u003eAREAS OF USE\u003c\/h2\u003e\n\u003cp\u003ePerfect for \u003cstrong\u003elocking mechanisms on hatches, doors, cabinets, toolboxes, and boat decks\u003c\/strong\u003e, especially in \u003cstrong\u003ecoastal environments, on docks, in the food industry, or at chemical plants\u003c\/strong\u003e.\u003cbr\u003eThe \u003cstrong\u003eacid-proof construction\u003c\/strong\u003e guarantees that the hasp remains functional even after long exposure to saltwater or cleaning agents.\u003cbr\u003eEasily mounted with \u003cstrong\u003estainless screws or bolts\u003c\/strong\u003e and requires minimal maintenance – a reliable solution for secure closure in demanding environments.\u003c\/p\u003e\n\u003ch2\u003eTECHNICAL SPECIFICATIONS\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eProduct type:\u003c\/strong\u003e Hasp\u003cbr\u003e\u003cstrong\u003eStandard:\u003c\/strong\u003e Not specified\u003cbr\u003e\u003cstrong\u003eQuality: \u003c\/strong\u003eA4 \/ AISI 316\u003cbr\u003e\u003cstrong\u003eMaterial class:\u003c\/strong\u003e Not applicable\u003cbr\u003e\u003cstrong\u003eThread type: \u003c\/strong\u003eNot applicable\u003cbr\u003e\u003cstrong\u003eSurface finish: \u003c\/strong\u003eUntreated (natural stainless steel)\u003cbr\u003e\u003cstrong\u003eHead shape: \u003c\/strong\u003eLocking latch with hinge plate\u003cbr\u003e\u003cstrong\u003eGrip type:\u003c\/strong\u003e Not applicable\u003c\/p\u003e\n\u003ch2\u003eFREQUENTLY ASKED QUESTIONS (FAQ)\u003c\/h2\u003e\n\u003ch3\u003eWhat characterizes an acid-proof A4 stainless steel hasp, and why is it the right choice?\u003c\/h3\u003e\n\u003cp\u003eAn \u003cb\u003ehasp\u003c\/b\u003e (also known as a locking hasp or hinge hasp) made of acid-proof A4 steel is a classic, mechanical locking device for securely closing doors, hatches, and chests:\u003c\/p\u003e\n\u003cul\u003e\n\n\u003cli\u003e\n\n\u003cp\u003e\u003cb\u003eSecure mechanical closure:\u003c\/b\u003e The hasp’s hinged arm folds over the locking loop and keeps the hatch closed. In combination with a padlock, it creates an effective and visible deterrent against theft and unauthorized access.\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cp\u003e\u003cb\u003eVibration-proof hinge construction:\u003c\/b\u003e The stable joints prevent the hasp from shaking open or working loose during movement on ships, vehicles, or machine covers exposed to vibration.\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cp\u003e\u003cb\u003eHidden screw holes when in the closed position:\u003c\/b\u003e On most models, the folded arm covers the mounting screws on the base plate, making it impossible to unscrew the hasp once it is locked with a padlock.\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\u003ch3\u003eWhy is acid-proof A4 steel (AISI 316) an absolute requirement for marine and industrial environments?\u003c\/h3\u003e\n\u003cp\u003eOrdinary stainless steel (A2) or galvanized fittings are often insufficient when stresses are high:\u003c\/p\u003e\n\u003cul\u003e\n\n\u003cli\u003e\n\n\u003cp\u003e\u003cb\u003eContains molybdenum (2–3%):\u003c\/b\u003e The addition of molybdenum in A4 steel (1.4401 \/ AISI 316) provides outstanding protection against chlorides, saltwater, road salt, and acid-based cleaning agents.\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cp\u003e\u003cb\u003eResists crevice and pitting corrosion:\u003c\/b\u003e Around joints, hinge pins, and under the mounting plate where moisture and splash water may collect, the A4 material effectively prevents the formation of corrosion damage and surface rust.\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cp\u003e\u003cb\u003eMaximum outdoor service life:\u003c\/b\u003e Retains its shiny finish and mechanical strength without seizing, rusting, or weakening, making it ideal for boat decks, docks, chemical plants, and coastal properties.\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\n\u003c\/ul\u003e\n\u003ch3\u003eHow do you mount an A4 hasp correctly for maximum security?\u003c\/h3\u003e\n\u003col start=\"1\"\u003e\n\n\u003cli\u003e\n\n\u003cp\u003e\u003cb\u003eAlign the arm and loop:\u003c\/b\u003e Position the mounting plate on the door\/hatch and the locking loop on the frame. Ensure that the arm folds smoothly over the loop without straining or catching on the edges.\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cp\u003e\u003cb\u003eUse acid-proof fasteners (A4):\u003c\/b\u003e Always mount the hasp with countersunk or pan-head screws in matching A4 steel. Using electro-galvanized screws or A2 screws in marine use can cause galvanic corrosion and weaken the attachment.\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\u003cli\u003e\n\n\u003cp\u003e\u003cb\u003eAdapt the padlock shackle:\u003c\/b\u003e Choose a padlock with a shackle diameter that precisely matches the hole in the locking loop to minimize play and make forced entry more difficult.\u003c\/p\u003e\n\n\n\u003c\/li\u003e\n\n\n\u003c\/ol\u003e","brand":"WASI","offers":[{"title":"Default Title","offer_id":48796673179990,"sku":"400163","price":89.0,"currency_code":"SEK","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0776\/7864\/1494\/files\/rostfri-nu-acid-proof-stainless-steel-cabin-hook.jpg?v=1786283377","url":"https:\/\/rostfri.nu\/en\/products\/hasp-a4","provider":"Rostfri.nu","version":"1.0","type":"link"}