{"product_id":"316-stainless-wing-bolts-thumb-screws-m4-m5-m6-m8","title":"A4 316 Stainless Steel Wing Bolts \u0026 Thumb Screws M4 M5 M6 M8 – Marine Grade","description":"\u003cdiv class=\"homediyer-product\"\u003e\n\u003c!-- Product Title (visible heading) --\u003e\n\u003ch2 class=\"homediyer-product__title\"\u003e⚓ A4 Marine Grade 316 Stainless Steel Wing Bolts \u0026amp; Thumb Screws – M4 M5 M6 M8\u003c\/h2\u003e\n\u003c!-- Overview Section --\u003e\n\u003cdiv class=\"homediyer-product__section\"\u003e\n\u003cp class=\"homediyer-product__text\"\u003eWhether you're rigging boat accessories, assembling outdoor furniture, or tackling a DIY project where tool access is limited, these A4 marine-grade 316 stainless steel wing bolts provide the perfect blend of corrosion resistance and convenience. Designed with large, easy‑to‑grip wings, they allow you to fasten and unfasten by hand – no wrench required. Unlike standard steel fasteners that rust after one rainy season, the 316 stainless body holds up against saltwater, chlorinated pools, humidity, and harsh weather. Available in the most common metric sizes (M4, M5, M6, and M8), they are a go‑to choice for boat owners, mechanics, woodworkers, and anyone who needs a secure, quickly adjustable connection that won’t degrade over time.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c!-- Key Features (vertical list for SEO) --\u003e\n\u003cdiv class=\"homediyer-product__section\"\u003e\n\u003ch2 class=\"homediyer-product__subtitle\"\u003e🔩 Key Features of Marine Grade 316 Stainless Wing Bolts\u003c\/h2\u003e\n\u003cul class=\"homediyer-product__list\"\u003e\n\u003cli\u003e\n\u003cstrong\u003e🌊 True A4 Marine Grade 316 Stainless Steel\u003c\/strong\u003e – Delivers superior protection against rust, pitting, and crevice corrosion, even in saltwater spray or submerged environments. Far more durable than 304 stainless.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e🤚 Hand‑Tightenable Wing Design\u003c\/strong\u003e – Large, symmetrical wings give you excellent torque without tools. Perfect for tight spaces, frequent adjustments, or when you simply don’t want to grab a wrench.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e📏 Multiple Metric Sizes (M4 \/ M5 \/ M6 \/ M8)\u003c\/strong\u003e – Covers a wide range of light to medium‑duty applications. Easily match existing threads in brackets, panels, machine housings, and furniture hardware.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e🧲 Non‑Magnetic \u0026amp; Food‑Safe\u003c\/strong\u003e – 316 stainless is essentially non‑magnetic and safe for incidental contact with food‑grade equipment, making it ideal for breweries, kitchens, and laboratories.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e🧰 Clean, Uniform Threads\u003c\/strong\u003e – Precision‑rolled threads ensure smooth engagement with nuts, threaded inserts, and tapped holes. Reduces cross‑threading and galling, a common problem with cheaper stainless bolts.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c!-- Specification Table Section --\u003e\n\u003cdiv class=\"homediyer-product__section\"\u003e\n\u003ch2 class=\"homediyer-product__subtitle\"\u003e📊 M4 M5 M6 M8 Wing Bolt Specifications\u003c\/h2\u003e\n\u003cdiv class=\"homediyer-product__table-wrap\"\u003e\n\u003ctable class=\"homediyer-product__table\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eSize\u003c\/th\u003e\n\u003cth\u003eThread Pitch\u003c\/th\u003e\n\u003cth\u003eTypical Lengths (Variant Selection)\u003c\/th\u003e\n\u003cth\u003eMaterial\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eM4\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e0.7 mm\u003c\/td\u003e\n\u003ctd\u003e6 mm, 8 mm, 10 mm, 16 mm, 20 mm\u003c\/td\u003e\n\u003ctd\u003eA4 316 Stainless\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eM5\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e0.8 mm\u003c\/td\u003e\n\u003ctd\u003e8 mm, 10 mm, 16 mm, 20 mm, 25 mm\u003c\/td\u003e\n\u003ctd\u003eA4 316 Stainless\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eM6\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1.0 mm\u003c\/td\u003e\n\u003ctd\u003e10 mm, 16 mm, 20 mm, 25 mm, 30 mm\u003c\/td\u003e\n\u003ctd\u003eA4 316 Stainless\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eM8\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1.25 mm\u003c\/td\u003e\n\u003ctd\u003e12 mm, 16 mm, 20 mm, 25 mm, 30 mm, 40 mm\u003c\/td\u003e\n\u003ctd\u003eA4 316 Stainless\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cp class=\"homediyer-product__note\"\u003e⚡ Length refers to the threaded portion below the wing head. Please select your required size and length from the dropdown menu above.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c!-- FAQ Section (fully expanded) --\u003e\n\u003cdiv class=\"homediyer-product__section\"\u003e\n\u003ch2 class=\"homediyer-product__subtitle\"\u003e❓ Frequently Asked Questions – 316 Stainless Thumb Screws\u003c\/h2\u003e\n\u003cdiv class=\"homediyer-product__faq-item\"\u003e\n\u003ch3 class=\"homediyer-product__question\"\u003eQ: What exactly does “A4 Marine Grade 316” mean?\u003c\/h3\u003e\n\u003cp class=\"homediyer-product__answer\"\u003e“A4” is the metric designation for stainless steel that contains molybdenum, which dramatically improves resistance to chlorides like seawater. “316” is the American equivalent. This grade is the standard for marine hardware, chemical plants, and outdoor structures exposed to salt, humidity, or aggressive cleaning chemicals. You can trust these bolts in environments where normal 304 stainless would start to show rust spots.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"homediyer-product__faq-item\"\u003e\n\u003ch3 class=\"homediyer-product__question\"\u003eQ: Do I need any special tools to tighten these wing bolts?\u003c\/h3\u003e\n\u003cp class=\"homediyer-product__answer\"\u003eNo tools are required by design. The winged head gives you enough leverage to tighten or loosen the bolt with just your fingers. This is especially useful for panels that need frequent access, camera mounts, or boat drain plugs. If you need extra torque for a high‑vibration application, you can still use pliers on the wings, but hand-tightening is sufficient for most uses.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"homediyer-product__faq-item\"\u003e\n\u003ch3 class=\"homediyer-product__question\"\u003eQ: Are these bolts completely rust‑proof in saltwater?\u003c\/h3\u003e\n\u003cp class=\"homediyer-product__answer\"\u003e316 stainless offers exceptional resistance and is widely considered the best practical choice for marine use. While no metal is 100% immune to corrosion forever, these bolts will resist red rust and pitting far longer than 304 or zinc‑plated steel. For submersion, occasional rinsing with fresh water will extend their life even further. They have been successfully used on sailboats, docks, and beachfront homes for years.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"homediyer-product__faq-item\"\u003e\n\u003ch3 class=\"homediyer-product__question\"\u003eQ: How do I choose the correct size for my project?\u003c\/h3\u003e\n\u003cp class=\"homediyer-product__answer\"\u003eStart by identifying the thread diameter and pitch of the nut or tapped hole you’re fastening into. The most reliable method is to take an existing bolt to the hardware store and match it on a thread gauge. If you’re starting fresh, M4 works for light brackets and electronics, M5‑M6 for furniture and machinery covers, and M8 for heavier hold‑downs. Remember that wing bolts need enough finger clearance – avoid placing them in deeply recessed holes where you can’t grip the wings.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"homediyer-product__faq-item\"\u003e\n\u003ch3 class=\"homediyer-product__question\"\u003eQ: Can I use these with wood or plastic?\u003c\/h3\u003e\n\u003cp class=\"homediyer-product__answer\"\u003eYes, but you’ll need a compatible threaded insert or T‑nut designed for your material. Screwing them directly into soft wood or plastic can strip the threads. For plastic enclosures, consider heat‑set brass inserts. For wood, use threaded steel inserts or T‑nuts on the back side. The 316 stainless bolt itself will not react with treated lumber or plastics.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cstyle\u003e\n  \/*\n    ============================================================\n    Scoped Styles for HomeDIYer Product Description\n    Prefix: .homediyer-product\n    No external fonts, no heavy animations, mobile friendly.\n    ============================================================\n  *\/\n  .homediyer-product {\n    width: 100%;\n    max-width: 100%;\n    box-sizing: border-box;\n    padding: 0;              \/* No extra padding – page wrapper provides spacing *\/\n    color: #2c3e50;\n    line-height: 1.6;\n    word-wrap: break-word;\n  }\n\n  .homediyer-product *,\n  .homediyer-product *::before,\n  .homediyer-product *::after {\n    box-sizing: inherit;\n  }\n\n  \/* Title *\/\n  .homediyer-product__title {\n    font-size: clamp(1.5rem, 4vw, 2rem);\n    font-weight: 700;\n    margin: 0 0 0.8em 0;\n    line-height: 1.3;\n    color: #1a252f;\n    border-bottom: 2px solid #3498db;\n    padding-bottom: 0.4em;\n  }\n\n  \/* Sections *\/\n  .homediyer-product__section {\n    margin-bottom: 2.2rem;\n  }\n\n  .homediyer-product__text {\n    margin: 0;\n    font-size: 1.05rem;\n    color: #34495e;\n  }\n\n  \/* Subtitles *\/\n  .homediyer-product__subtitle {\n    font-size: 1.35rem;\n    font-weight: 600;\n    margin: 0 0 0.7em 0;\n    color: #1a252f;\n    display: flex;\n    align-items: center;\n    gap: 0.35em;\n  }\n\n  \/* Feature list *\/\n  .homediyer-product__list {\n    list-style: none;\n    padding: 0;\n    margin: 0;\n    display: flex;\n    flex-direction: column;\n    gap: 1rem;\n  }\n\n  .homediyer-product__list li {\n    padding-left: 1.6em;\n    position: relative;\n    font-size: 1rem;\n    color: #2c3e50;\n  }\n\n  .homediyer-product__list li::before {\n    content: \"✔️\";\n    position: absolute;\n    left: 0;\n    top: 0.1em;\n    font-size: 0.9rem;\n  }\n\n  .homediyer-product__list li strong {\n    display: block;\n    margin-bottom: 0.2em;\n    color: #1a252f;\n    font-weight: 600;\n  }\n\n  \/* Table wrapper for horizontal scroll on mobile *\/\n  .homediyer-product__table-wrap {\n    width: 100%;\n    overflow-x: auto;\n    -webkit-overflow-scrolling: touch;\n    margin-bottom: 0.8em;\n    border-radius: 8px;\n    box-shadow: 0 1px 6px rgba(0,0,0,0.08);\n  }\n\n  .homediyer-product__table {\n    width: 100%;\n    min-width: 500px; 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