{"product_id":"1-4-thick-5-25-od-round-aluminum-countersunk-pad-4-countersunk-holes-center-vent-marine-grade-6061-t6","title":"1\/4\" Thick 5.25\" OD Round Aluminum Countersunk Pad | 4 Countersunk Holes + Center Vent | Marine Grade 6061-T6","description":"\u003cp style=\"font-size:1.15em;line-height:1.4;margin-bottom:0.75em;text-transform:none;color:#4a7ab5\"\u003e\u003cstrong\u003e5.25\" OD Round Countersunk Pad with Center Weld Vent — 25\/64\" Holes\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp style=\"font-weight:400;font-size:0.9em\"\u003ePrecision CNC-machined 6061-T6 aluminum round countersunk pad with four mounting holes and a center vent. Designed for flush-mount fastening on fiberglass pedestal surfaces in saltwater marine environments. Four countersunk outer holes allow countersunk head screws to sit flush with the pad surface, while the center vent provides weld gas release during installation. Pairs with \u003ca href=\"\/es\/products\/1-4-thick-5-25-od-round-aluminum-backing-plate-4-through-holes-center-vent-marine-grade-6061-t6\" style=\"color:#4a7ab5;text-decoration:underline\"\u003eSKU 1019 Backing Plate\u003c\/a\u003e for a matching hole pattern. Commonly used on top or through the side of a deck pedestal, as well as through the fiberglass skin of a hardtop or T-top.\u003c\/p\u003e\n\n\u003ctable style=\"font-size:0.9em;border-collapse:collapse\"\u003e\n\u003ctr\u003e\n\u003ctd style=\"background-color:#1a1a1a;text-transform:none;color:#ffffff;border:1px solid #ffffff\"\u003e\u003cstrong\u003eMaterial\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"font-weight:400;border:1px solid #ffffff\"\u003eMarine Grade 6061-T6 Aluminum\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background-color:#1a1a1a;text-transform:none;color:#ffffff;border:1px solid #ffffff\"\u003e\u003cstrong\u003eOutside Diameter\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"font-weight:400;border:1px solid #ffffff\"\u003e5.25\" (133 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background-color:#1a1a1a;text-transform:none;color:#ffffff;border:1px solid #ffffff\"\u003e\u003cstrong\u003eThickness\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"font-weight:400;border:1px solid #ffffff\"\u003e1\/4\" (0.250\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background-color:#1a1a1a;text-transform:none;color:#ffffff;border:1px solid #ffffff\"\u003e\u003cstrong\u003eMounting Holes\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"font-weight:400;border:1px solid #ffffff\"\u003e4 countersunk (25\/64\" dia. for 3\/8\" fasteners)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background-color:#1a1a1a;text-transform:none;color:#ffffff;border:1px solid #ffffff\"\u003e\u003cstrong\u003eCenter\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"font-weight:400;border:1px solid #ffffff\"\u003e1 vent hole (weld gas release)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background-color:#1a1a1a;text-transform:none;color:#ffffff;border:1px solid #ffffff\"\u003e\u003cstrong\u003ePairs With\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"font-weight:400;border:1px solid #ffffff\"\u003e\n\u003ca href=\"\/es\/products\/1-4-thick-5-25-od-round-aluminum-backing-plate-4-through-holes-center-vent-marine-grade-6061-t6\" style=\"color:#4a7ab5;text-decoration:underline\"\u003eSKU 1019\u003c\/a\u003e (matching backing plate)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background-color:#1a1a1a;text-transform:none;color:#ffffff;border:1px solid #ffffff\"\u003e\u003cstrong\u003eShape\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"font-weight:400;border:1px solid #ffffff\"\u003eRound\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background-color:#1a1a1a;text-transform:none;color:#ffffff;border:1px solid #ffffff\"\u003e\u003cstrong\u003eFinish\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"font-weight:400;border:1px solid #ffffff\"\u003eMatte — tumbled, deburred, paint\/powder coat ready\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background-color:#1a1a1a;text-transform:none;color:#ffffff;border:1px solid #ffffff\"\u003e\u003cstrong\u003eWeight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"font-weight:400;border:1px solid #ffffff\"\u003e0.46 lb\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003cp style=\"text-transform:none;font-weight:600;font-size:1.05em;color:#4a7ab5\"\u003eCommon Applications\u003c\/p\u003e\n\u003cp style=\"font-weight:400;font-size:0.9em\"\u003eT-tops, tuna towers, hard tops, radar arches, leaning posts, grab bars — commonly used on top or through the side of a deck pedestal, as well as through the fiberglass skin of a hardtop or T-top.\u003c\/p\u003e\n\n\u003cp style=\"text-transform:none;font-weight:600;font-size:1.05em;color:#4a7ab5\"\u003eFrequently Asked Questions\u003c\/p\u003e\n\n\u003cp style=\"font-weight:400;font-size:0.9em\"\u003e\u003cstrong\u003eWhat does \"countersunk\" mean for this pad?\u003c\/strong\u003e\u003cbr\u003e\nCountersunk means the mounting holes are chamfered so countersunk head screws sit flush with the pad surface — no protruding screw heads that could snag lines or cause injury.\u003c\/p\u003e\n\n\u003cp style=\"font-weight:400;font-size:0.9em\"\u003e\u003cstrong\u003eWhat is the center vent hole for?\u003c\/strong\u003e\u003cbr\u003e\nThe center vent hole allows trapped air and gases to escape during welding, preventing blow-through and ensuring a clean, full-penetration weld.\u003c\/p\u003e\n\n\u003cp style=\"font-weight:400;font-size:0.9em\"\u003e\u003cstrong\u003eWhy four holes instead of three?\u003c\/strong\u003e\u003cbr\u003e\nFour-hole patterns provide additional fastener points for heavier-duty mounting applications — radar mounts, outrigger bases, and multi-axis load points on T-tops and hard tops.\u003c\/p\u003e\n\n\u003cp style=\"font-weight:400;font-size:0.9em\"\u003e\u003cstrong\u003eWhat size fasteners do I need?\u003c\/strong\u003e\u003cbr\u003e\nThe four countersunk holes are 25\/64\" diameter, sized for 3\/8\" fasteners. Use 3\/8\"-16 stainless countersunk head screws for best results.\u003c\/p\u003e\n\n\n\u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@graph\": [\n    {\n      \"@type\": \"Product\",\n      \"name\": \"1\/4\\\" Thick 5.25\\\" OD Round Aluminum Countersunk Pad | 4 Countersunk Holes + Center Vent | Marine Grade 6061-T6\",\n      \"sku\": \"1020\",\n      \"mpn\": \"1020\",\n      \"brand\": { \"@type\": \"Brand\", \"name\": \"Welding World\" },\n      \"description\": \"5.25 inch round aluminum countersunk pad with 4 mounting holes and center vent. 1\/4 inch thick, 6061-T6, 25\/64 inch hole diameter for flush-mount fastening on fiberglass decks. Pairs with SKU 1019.\",\n      \"material\": \"Aluminum 6061-T6\",\n      \"category\": \"Marine Deck Hardware\",\n      \"offers\": { \"@type\": \"Offer\", \"price\": \"22.00\", \"priceCurrency\": \"USD\", \"availability\": \"https:\/\/schema.org\/InStock\", \"seller\": { \"@type\": \"Organization\", \"name\": \"Welding World\" } }\n    },\n    {\n      \"@type\": \"FAQPage\",\n      \"mainEntity\": [\n        { \"@type\": \"Question\", \"name\": \"What does countersunk mean for this pad?\", \"acceptedAnswer\": { \"@type\": \"Answer\", \"text\": \"Countersunk means the mounting holes are chamfered so countersunk head screws sit flush with the pad surface — no protruding screw heads that could snag lines or cause injury.\" } },\n        { \"@type\": \"Question\", \"name\": \"What is the center vent hole for?\", \"acceptedAnswer\": { \"@type\": \"Answer\", \"text\": \"The center vent hole allows trapped air and gases to escape during welding, preventing blow-through and ensuring a clean, full-penetration weld.\" } },\n        { \"@type\": \"Question\", \"name\": \"Why four holes instead of three?\", \"acceptedAnswer\": { \"@type\": \"Answer\", \"text\": \"Four-hole patterns provide additional fastener points for heavier-duty mounting applications — radar mounts, outrigger bases, and multi-axis load points on T-tops and hard tops.\" } },\n        { \"@type\": \"Question\", \"name\": \"What size fasteners do I need?\", \"acceptedAnswer\": { \"@type\": \"Answer\", \"text\": \"The four countersunk holes are 25\/64 inch diameter, sized for 3\/8 inch fasteners. Use 3\/8-16 stainless countersunk head screws for best results.\" } },\n        { \"@type\": \"Question\", \"name\": \"Does this countersunk pad have a matching backing plate?\", \"acceptedAnswer\": { \"@type\": \"Answer\", \"text\": \"Yes — SKU 1020 pairs with SKU 1019, a 1\/4 inch thick 5.25 inch OD round backing plate with the same 4-hole pattern and center vent. The countersunk pad goes on the outside of the pedestal wall for a flush finish; the backing plate goes on the inside.\" } }\n      ]\n    }\n  ]\n}\n\u003c\/script\u003e","brand":"Welding World","offers":[{"title":"Default Title","offer_id":43243388141629,"sku":"Part Number: 1020","price":24.0,"currency_code":"USD","in_stock":false}],"url":"https:\/\/weldingworldinc.com\/es\/products\/1-4-thick-5-25-od-round-aluminum-countersunk-pad-4-countersunk-holes-center-vent-marine-grade-6061-t6","provider":"Welding World, Inc.","version":"1.0","type":"link"}