{"product_id":"5-16-x-3-lag-screw-kit-50-pack-ceramic-black-ruspert-coating","title":"5\/16 x 3 Lag Screw Kit 50 Pack - Ceramic Black Ruspert Coating","description":"\u003cp\u003eIn this review of the 5\/16 x 3 Lag Screw Kit the bottom line is practical: this kit is for buyers who need a dependable, weather-resistant bulk fastener set for exterior projects. Our review finds the strongest reason to buy is the four-layer Black Ruspert ceramic coating, which offers improved corrosion protection over plain galvanized hardware and makes these lag screws suitable for ACQ treated lumber. The kit combines 50 Grade A307 lag screws with 50 USS flat washers so a contractor or serious DIYer gets a ready-to-use pack for decking, framing, or exterior timber connections.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eKit contents:\u003c\/strong\u003e Includes 50 Grade A307 lag screws and 50 USS flat washers so a single purchase covers multiple fastenings without hunting for matching washers.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeatherproof coating:\u003c\/strong\u003e Black Ruspert provides a four-layer ceramic finish that increases rust resistance and is designed for exterior exposure.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSize and fit:\u003c\/strong\u003e The 5\/16 in diameter and 3 in length are a common size for heavy timber joins and the 1\/2 in head width gives good wrench engagement.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLumber compatibility:\u003c\/strong\u003e Marked suitable for ACQ treated lumber, letting users install in pressure-treated wood with reduced corrosion concern.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandards compliance:\u003c\/strong\u003e Meets ASTM A307 and ASME B18.2.1 family standards, giving assurance of industrial\/commercial grade manufacturing.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eWho It's For\u003c\/h2\u003e\u003cp\u003eThe kit is aimed at contractors, remodelers, and experienced DIYers who need a bulk supply of uniform lag screws and matching USS washers for exterior projects such as decking, pergolas, timber framing, and other structural wood connections. The included washers simplify ordering and ensure correct bearing under bolt heads.\u003c\/p\u003e\u003cp\u003eThose looking for specialty stainless steel fasteners or very long lag screws should look elsewhere, since this kit is a carbon steel Grade A307 product with a protective Ruspert coating rather than a stainless alloy alternative. Also, for very small hobby projects the 50-count quantity may be more than required.\u003c\/p\u003e\u003ch2\u003ePros \u0026amp; Cons\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003ePros\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eFour-layer Black Ruspert coating offers enhanced corrosion resistance for exterior use and ACQ lumber.\u003c\/li\u003e\n\u003cli\u003eIncludes 50 USS flat washers so each lag screw has the correct washer for reliable seating.\u003c\/li\u003e\n\u003cli\u003eMeets ASTM A307 and ASME B18.2.1 standards, indicating consistent, industrial-grade dimensions and strength.\u003c\/li\u003e\n\u003cli\u003eCommon 5\/16 in by 3 in size with 1\/2 in head width fits typical heavy-wood connections and standard tools.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eNot stainless steel; users in very high-corrosion environments may prefer stainless fasteners.\u003c\/li\u003e\n\u003cli\u003eInstallation requires a pilot hole, which adds a step compared with self-drilling fasteners.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eSpecifications\u003c\/h2\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eDiameter\u003c\/td\u003e\n\u003ctd\u003e5\/16 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLength\u003c\/td\u003e\n\u003ctd\u003e3 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHead width\u003c\/td\u003e\n\u003ctd\u003e1\/2 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eKit quantity\u003c\/td\u003e\n\u003ctd\u003e50 lag screws + 50 USS flat washers (100 pcs total)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWasher outside diameter\u003c\/td\u003e\n\u003ctd\u003e7\/8 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCoating\u003c\/td\u003e\n\u003ctd\u003eBlack Ruspert four-layer ceramic coating\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStandards\u003c\/td\u003e\n\u003ctd\u003eMeets ASTM A307 and ASME B18.2.1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch2\u003eOur Verdict\u003c\/h2\u003e\u003cp\u003eThis 5\/16 x 3 lag screw kit is a sensible value for contractors and serious DIYers who need a bulk supply of weather-resistant fasteners for exterior wood work. The inclusion of 50 USS washers and the Black Ruspert coating make it practical for ACQ treated lumber and outdoor use, while standards compliance gives confidence in dimensions and material grade.\u003c\/p\u003e\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eAre these suitable for pressure-treated wood?\u003c\/strong\u003e\u003cbr\u003eYes, the Black Ruspert coating and product notes indicate suitability for ACQ treated lumber.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDo I need to pre-drill?\u003c\/strong\u003e\u003cbr\u003eYes, a pilot hole is recommended for installation to prevent wood splitting and ease driving the 5\/16 in lag screws.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is included in the kit?\u003c\/strong\u003e\u003cbr\u003eThe kit contains 50 Grade A307 lag screws (5\/16 x 3 in) and 50 USS flat washers (outside diameter 7\/8 in).\u003c\/p\u003e","brand":"Makers Bolt","offers":[{"title":"Default Title","offer_id":48665457295579,"sku":"B0DM2NVGXW","price":37.07,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/712apG4-IKL._SL1500_edb1fa72-6946-4e50-9366-af197a990314.jpg?v=1778698741","url":"https:\/\/gearmusthave.com\/products\/5-16-x-3-lag-screw-kit-50-pack-ceramic-black-ruspert-coating","provider":"GearMustHave","version":"1.0","type":"link"}