{"id":528,"date":"2026-10-09T01:22:10","date_gmt":"2026-10-08T17:22:10","guid":{"rendered":"http:\/\/www.anamstone.com\/blog\/?p=528"},"modified":"2026-10-09T01:22:10","modified_gmt":"2026-10-08T17:22:10","slug":"what-is-the-corrosion-resistance-of-4-14mm-pitch-components-4f3a-218402","status":"publish","type":"post","link":"http:\/\/www.anamstone.com\/blog\/2026\/10\/09\/what-is-the-corrosion-resistance-of-4-14mm-pitch-components-4f3a-218402\/","title":{"rendered":"What is the corrosion resistance of 4.14mm Pitch components?"},"content":{"rendered":"

Hey everyone, it\u2019s Jake here from the component supply team, and if you\u2019ve ever worked with through-hole connectors or industrial electronics, you\u2019ve probably run across 4.14mm pitch parts. You might be wondering why that specific measurement matters so much, or how these hold up when exposed to all the messy, corrosive stuff that parts have to deal with out in the real world\u2014like salt spray, humidity, or even that weird grime from factory floors. As someone who\u2019s spent the last 8 years supplying these exact parts, I get it: corrosion is the quiet killer of electronics, and no one wants to be the one whose field deployment fails because a connector turned brown and stopped working. Today, we\u2019re breaking down exactly how corrosion-resistant 4.14mm pitch components actually are, what factors affect that, and what you need to know if you\u2019re using these parts for your next project. 4.14mm Pitch<\/a><\/p>\n

<\/p>\n

First off, let\u2019s make sure we\u2019re on the same page about what 4.14mm pitch means, just in case you\u2019re new here. Pitch is the distance between the center of one pin on a connector to the center of the next one\u2014so 4.14mm is a pretty standard, medium pitch. It\u2019s not as tiny as 0.5mm fine-pitch parts, which are super sensitive to dust and corrosion because their gaps are smaller, and it\u2019s way more compact than big 10mm+ power connectors. That mid-range sweet spot is why these are so popular for industrial controls, automotive interior systems, agricultural equipment, and even some commercial HVAC systems. But their corrosion resistance? It\u2019s not a one-size-fits-all number. It depends entirely on three big things: the materials we use to make the pins and shells, the plating on those pins, and how we assemble and seal the parts.<\/p>\n

Let\u2019s start with the most critical part for corrosion resistance: the pin plating. The actual metal underneath the plating (usually copper alloy, because it\u2019s strong and conductive) would turn into copper oxide in like, a week if you left it outside. So we plate the pins with something that doesn\u2019t oxidize. For most of our standard 4.14mm parts, we use tin-nickel plating. Wait, I know what you\u2019re thinking\u2014tin is common, right? A lot of cheap parts use tin plating, which is soft and can form tin whiskers that short circuits, plus tin oxidizes to tin oxide, which is non-conductive. Tin-nickel is a whole different beast. It\u2019s a hard, dense alloy that\u2019s way less porous than pure tin, so moisture and corrosive gases can\u2019t get through to the copper core. We test our standard tin-nickel plated pins in salt spray (the big 5% NaCl test that mimics marine or high-humidity environments) and they easily hit 500 hours of no red rust, and even 1000 hours for our premium grade. That\u2019s way better than pure tin plating, which might only last 96 hours before you start seeing corrosion.<\/p>\n

For parts that need even more protection\u2014like if you\u2019re deploying them on offshore equipment or heavy agricultural machinery that gets caked in fertilizer (which is super corrosive, by the way)\u2014we offer gold flash plating, or even thicker gold over nickel plating. Gold is basically inert; it doesn\u2019t react with anything, so you\u2019d be hard-pressed to find a corrosive environment that affects gold. Our gold-plated 4.14mm parts pass over 2000 hours of salt spray, and they hold up way better in harsh chemicals like oil, fertilizer, and mild acids. The only downside? Gold plating is more expensive, so we only recommend it for extreme environments, not general use. That said, don\u2019t sleep on our tin-nickel parts\u201490% of our customers don\u2019t need gold, and tin-nickel holds up more than enough for most applications.<\/p>\n

Next up: the connector shell. The shell is the outer casing that protects the pins from physical damage and keeps moisture out, so its material and plating matter a lot too. Most of our standard 4.14mm parts use zinc die-cast shells with a nickel underplate and a polyester powder coat finish. That combo is tough\u2014zinc is strong, the nickel underplate prevents corrosion from getting into the zinc, and the powder coat is a thick, flexible layer that seals out water, dust, and even minor chemicals. We test those shells in what\u2019s called a humidity cycle test, where we cycle between 85 degrees Celsius and 85% humidity for 1000 hours, and none of them show any sign of rust or the powder coat flaking. For even tougher use cases, we offer aluminum shells with an anodized finish\u2014aluminum naturally forms a thin oxide layer that protects it, but anodizing makes that layer way thicker and more durable, perfect for parts that get banged around or exposed to road salt, fertilizer, or other abrasive corrosives.<\/p>\n

Wait, but here\u2019s a thing I see customers mess up all the time: corrosion isn\u2019t just on the metal parts. The gap between the connector pins\u2014where the pitch is 4.14mm\u2014if that gap gets filled with conductive dust or moisture that causes a micro-short, that\u2019s a form of corrosion-related failure too, even if the metal doesn\u2019t rust. That\u2019s why we offer sealed 4.14mm parts too, not just open-frame ones. Our sealed parts have rubber gaskets around the connector housing that block water, dust, and even oil from getting inside. We test those parts with the IP67 rating, which means you can submerge them in 1 meter of water for 30 minutes and they\u2019ll still work\u2014so they\u2019re basically waterproof. That\u2019s a game-changer for outdoor equipment, construction tools, or any application where the parts might get rained on or sprayed with water.<\/p>\n

Now, let\u2019s talk about real-world testing, because lab numbers are great, but what happens when our parts are actually out in the field? We\u2019ve had a customer who used our standard tin-nickel 4.14mm connectors on a fleet of agricultural tractors in Iowa\u2014they get exposed to salt in winter roads, fertilizer dust, and super high humidity in the summer. After 3 years, they pulled a sample of connectors to test, and the pins still had no red rust, the powder coat was intact, and the conductivity was exactly the same as new. They switched all their models to our parts after that, because they were sick of their old connectors failing every year. We also have a customer that uses our gold-plated 4.14mm parts on offshore oil rig control systems\u2014those are exposed to salt air 24\/7, 365 days a year, and they haven\u2019t had a single corrosion-related failure in 5 years. That\u2019s the stuff that matters way more than any spec sheet number.<\/p>\n

But wait, there are some mistakes that people make when using 4.14mm pitch parts that can make corrosion worse, even if the parts themselves are good. For example, if you\u2019re mating and unmating the connector too many times\u2014like more than 500 cycles for our standard parts\u2014you can wear down the plating, and expose the copper core, which will corrode. That\u2019s why we rate our standard parts for 500 mating cycles, and our heavy-duty parts for 1000, so make sure you\u2019re checking that spec for your application. Another mistake is not using the right cable sealing. If you run a cable through the back of the connector and don\u2019t use a strain relief or a rubber boot, moisture can wick up the cable and get inside the housing, leading to corrosion over time. We sell those accessories, so don\u2019t skip them.<\/p>\n

Also, let\u2019s address a common question: is 4.14mm pitch more or less corrosion-resistant than smaller or larger pitch parts? Let\u2019s break that down. Smaller pitch parts\u2014like 1.27mm or 2.54mm\u2014have tighter gaps between pins, so dust, moisture, and corrosive gases get trapped way easier, and their plating is usually thinner because the pins are smaller. So even if you use the same plating, fine-pitch parts are more prone to corrosion. Larger pitch parts\u2014like 7.62mm or 10mm power connectors\u2014have bigger pins, so their surface area for corrosion is higher, but their shells are usually bulkier and less sealed. So 4.14mm is right in that sweet spot where it has enough space between pins to keep them from trapping debris, but small enough to be compact, and we can use full-thickness plating and seals that are just as good as larger parts. That\u2019s why it\u2019s such a popular choice for so many industries.<\/p>\n

Now, if you\u2019re shopping around for 4.14mm pitch components, what should you look for to make sure you\u2019re getting the corrosion resistance you need? First, check the plating specs. If a supplier is using pure tin plating, run the other way\u2014tin is cheap, but it\u2019s terrible for long-term corrosion, and those tin whiskers are a real problem. Ask for tin-nickel or gold plating, and get the salt spray test hours in writing. Second, check the shell material and finish. Zinc with powder coat is great for most use cases, aluminum anodized if you need more, and avoid uncoated steel shells\u2014those will rust in 6 months outside. Third, ask about sealing. If your application is even slightly harsh, don\u2019t get open-frame parts\u2014get IP65 or IP67 sealed, it\u2019s a small cost increase for way less downtime later.<\/p>\n

<\/p>\n

At the end of the day, corrosion resistance for 4.14mm pitch parts isn\u2019t some magical number\u2014it\u2019s a combination of good materials, proper plating, and smart design. We\u2019ve spent years refining our parts to make sure they hold up to everything from a dry office to a muddy farm field or a salt-sprayed offshore rig, and our customers\u2019 track backs speak for themselves. If you\u2019re working on a project right now and you\u2019re not sure if our 4.14mm parts are right for your corrosion needs, or if you have questions about plating options, sealing, or anything else, reach out to our team to talk through your project. We don\u2019t do pushy sales pitches\u2014we just give you straight answers and parts that work. No hidden fees, no cheap materials, just reliable components that won\u2019t fail when you need them.<\/p>\n

0.60mm Pitch<\/a> References
\nIEC 60068-2-11: Environmental testing – Part 2-11: Tests – Test Ka: Salt mist
\nMIL-STD-202: Test Method Standard for Electronic and Electrical Component Parts, Method 101 (Salt Spray)
\nConnector Plating Materials and Corrosion Resistance: A Review, Journal of Electronic Materials, 2019
\nIP Code Classification Standard (IEC 60529): Degrees of Protection Provided by Enclosures<\/p>\n

\n

Dongguan Yinglian Electronics Co., Ltd.<\/a>
We’re well-known as one of the most professional 4.14mm pitch suppliers in China. With abundant experience, we warmly welcome you to buy bulk advanced 4.14mm pitch made in China here from our factory. If you have any enquiry about cooperation, please feel free to email us.
Address:
E-mail: James@csg-china.com
WebSite: https:\/\/www.csgconn.com\/<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

Hey everyone, it\u2019s Jake here from the component supply team, and if you\u2019ve ever worked with … What is the corrosion resistance of 4.14mm Pitch components?<\/span>Read more<\/a><\/p>\n","protected":false},"author":313,"featured_media":528,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[491],"class_list":["post-528","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-industry","tag-4-14mm-pitch-4ade-223a49"],"_links":{"self":[{"href":"http:\/\/www.anamstone.com\/blog\/wp-json\/wp\/v2\/posts\/528","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/www.anamstone.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.anamstone.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.anamstone.com\/blog\/wp-json\/wp\/v2\/users\/313"}],"replies":[{"embeddable":true,"href":"http:\/\/www.anamstone.com\/blog\/wp-json\/wp\/v2\/comments?post=528"}],"version-history":[{"count":0,"href":"http:\/\/www.anamstone.com\/blog\/wp-json\/wp\/v2\/posts\/528\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"http:\/\/www.anamstone.com\/blog\/wp-json\/wp\/v2\/posts\/528"}],"wp:attachment":[{"href":"http:\/\/www.anamstone.com\/blog\/wp-json\/wp\/v2\/media?parent=528"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.anamstone.com\/blog\/wp-json\/wp\/v2\/categories?post=528"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.anamstone.com\/blog\/wp-json\/wp\/v2\/tags?post=528"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}