{"product_id":"316ss-lock-washer-5-16-100-pack-fas-wl316-5-16","title":"316 Stainless Steel Lock Washer 5\/16\" 100-Pack (FAS-WL316-5\/16)","description":"\u003ch2\u003e316 Stainless Steel Lock Washer — 5\/16\", 100-Pack\u003c\/h2\u003e\u003cp\u003eKeep marine fasteners secure against vibration and movement with these 316 stainless steel split lock washers. Sized for 5\/16\" bolts and screws — one of the most common fastener sizes in marine hardware installations — the FAS-WL316-5\/16 100-pack provides a cost-effective bulk supply of corrosion-resistant lock washers for deck hardware, engine mounts, electrical panels, and any through-bolted installation where fastener retention is critical.\u003c\/p\u003e\u003ch3\u003eKey Features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e316 Stainless Steel\u003c\/strong\u003e — Superior corrosion resistance in salt water, bilge, and high-humidity marine environments; 316 alloy provides significantly better corrosion resistance than 304 SS in chloride-rich conditions\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSplit Lock Washer Design\u003c\/strong\u003e — Helical split creates spring tension under the fastener head, biting into both the fastener and the mating surface to resist loosening under vibration and dynamic loads\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e5\/16\" Bolt Size\u003c\/strong\u003e — Fits 5\/16\" bolts, machine screws, and carriage bolts used throughout marine hardware, deck fittings, engine mounts, and electrical panel installations\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e100-Pack Bulk Quantity\u003c\/strong\u003e — Sufficient for a full hardware installation project or a well-stocked onboard and workshop spares kit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConsistent Dimensions\u003c\/strong\u003e — Precision-stamped to consistent thickness and split geometry for reliable spring tension across the full pack\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e 316 stainless steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e Split (helical) lock washer\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBolt Size:\u003c\/strong\u003e 5\/16\"\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQuantity:\u003c\/strong\u003e 100 per pack\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e Deck hardware, engine mounts, electrical panels, through-bolted fittings, stanchion bases, cleats\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSKU:\u003c\/strong\u003e FAS-WL316-5\/16\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eWhen to Use Lock Washers\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eEngine mounts \u0026amp; motor brackets\u003c\/strong\u003e — High vibration environment; lock washers prevent backing off under continuous engine operation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDeck hardware\u003c\/strong\u003e — Cleats, stanchion bases, handrails, and through-bolted fittings subject to load cycling and vibration\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eElectrical panels \u0026amp; bus bars\u003c\/strong\u003e — Prevents terminal screws from loosening under vessel vibration, maintaining reliable electrical connections\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOutboard motor brackets \u0026amp; transom hardware\u003c\/strong\u003e — High-vibration, high-load applications where fastener retention is safety-critical\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003e316 vs 304 Stainless — Why It Matters\u003c\/h3\u003e\u003cp\u003e316 stainless steel contains molybdenum, which significantly improves resistance to chloride-induced pitting and crevice corrosion — the primary failure mode for stainless fasteners in marine environments. Always specify 316 SS for below-waterline, deck, and engine bay applications. 304 SS is acceptable only for interior, dry applications where salt exposure is minimal.\u003c\/p\u003e\u003ch3\u003eInstallation Notes\u003c\/h3\u003e\u003cp\u003ePlace the lock washer between the fastener head (or nut) and the mating surface — not between the washer and the substrate. Tighten the fastener to the specified torque; the split will compress and flatten, creating the locking tension. Do not reuse lock washers that have been fully compressed — replace with new washers to ensure effective locking action. For critical applications, combine with a flat washer beneath the lock washer to protect soft substrates.\u003c\/p\u003e\u003cp\u003eThe FAS-WL316-5\/16 100-pack is the right bulk supply for any marine installation where 5\/16\" fastener retention and corrosion resistance are required.\u003c\/p\u003e","brand":"WEST","offers":[{"title":"Default Title","offer_id":43642399162404,"sku":"FAS-WL316-5\/16","price":25.25,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0743\/5799\/7604\/files\/316_Stainless_Steel_Lock_Washer_5_16.jpg?v=1776459101","url":"https:\/\/marisolmarine.com\/products\/316ss-lock-washer-5-16-100-pack-fas-wl316-5-16","provider":"Marisol Marine Company","version":"1.0","type":"link"}