Steel Fence Iron Gate Lock Pin Latch SDB400-185HDGHeavy-duty 400mm hot-dip galvanized steel drop bolt for iron gates and steel fence panels. Suitable for large farm gates and commercial applications. MOQ 3,000 pcs.MaterialCold rolled steelFinishHot-dip galvanized (HDG)MOQ3,000 pcsLead time30 daysKey Features400mm heavy-duty drop bolt for large gate openingsHot-dip galvanized (HDG) finish for maximum corrosion resistanceCold rolled steel construction for durabilitySmooth sliding mechanism for easy operationSuitable for farm gates and commercial applicationsIdeal for coastal and high-humidity environmentsOEM and ODM orders acceptedEasy installationTechnical SpecificationsSpecificationValueItem No.SDB400-185HDGMaterialCold rolled steelFinishHot-dip galvanized (HDG)Length400mmProduct weight0.85 kgMOQ3,000 pcsCTN. Spec110 x 110 x 100 cm / 500 PieceG.W/N.W500 / 480 kgSelling UnitsPieceBrand NameSTProduct DescriptionThe SDB400-185HDG is a heavy-duty 400mm drop bolt designed for iron gates and steel fence panels. Made from cold rolled steel with a hot-dip galvanized (HDG) finish, this drop bolt provides superior corrosion resistance and long-lasting performance in demanding outdoor environments. The SDB400-185HDG features a robust sliding mechanism that allows for secure locking of large gates and fence panels. The 400mm length provides excellent security for wide gate openings, while the hot-dip galvanized finish ensures maximum corrosion protection even in coastal and high-humidity environments. This drop bolt is ideal for farm gates, commercial properties, and industrial applications where heavy-duty security is required. Easy Installation. Different designs are available according to customers' requirements. OEM and ODM orders are acceptable.Typical ApplicationsFarm gatesCommercial gatesIndustrial gatesIron fence panelsSteel fence panelsWide gate openingsFAQWhat types of latches and drop bolts do you manufacture?We manufacture a comprehensive range including D-latches, ring latches, tower bolts, cane bolts (drop rods), barrel bolts, spring latches, and magnetic gate latches. Products are available in steel (HDG, powder coated, zinc plated), stainless steel 304/316, and aluminium alloy to suit different gate materials and environments.Are your latches and drop bolts suitable for pool fence compliance?Yes. We supply pool fence-compliant latches that meet AS 1926.1 (Australia), ASTM F2200 (USA), and EN 13241 (Europe) requirements. Our self-closing, self-latching gate latches are designed to prevent accidental opening and are suitable for child-safe pool enclosures. Compliance documentation is available upon request.What is the load rating for your drop bolts and cane bolts?Standard drop bolts (12 mm rod diameter) have a vertical load rating of 200 kg. Heavy-duty cane bolts (16 mm rod) are rated to 500 kg. All load ratings are based on static vertical load. For dynamic or impact loads (e.g., high-traffic industrial gates), please contact us for engineering recommendations.Can latches be keyed or padlocked for security?Yes. We offer lockable versions of most latch models with padlock holes (10 mm diameter, suitable for standard padlocks). Keyed cylinder latches are also available for applications requiring key-operated locking from both sides. Custom security configurations can be quoted for high-security perimeter fencing projects.What is the MOQ and lead time for latches and drop bolts?Standard latch and drop bolt models have an MOQ of 500–1,000 pieces. Mixed models can be combined to meet the minimum order value. Stock items ship within 7–15 days; production orders require 20–30 days. Custom finishes or non-standard sizes require 30–45 days lead time.What finish options do you offer for this 400mm heavy-duty drop bolt?The standard SDB400-185HDG model is manufactured with a hot-dip galvanized (HDG) finish, providing maximum corrosion resistance for harsh agricultural and commercial environments compared to standard electro-galvanizing. We also offer custom powder coating over the galvanized steel to match specific iron gate colors, as well as standard zinc plating for less demanding applications. Please note that requesting custom finishes for this heavy-duty latch requires meeting the standard 3,000-piece minimum order quantity.Do you offer OEM/ODM services to customize the dimensions or add our company logo to the drop bolts?Yes, we provide comprehensive OEM and ODM services for our heavy-duty drop bolts, allowing you to customize rod lengths, diameters, and mounting plate designs. We can also stamp your company logo directly onto the galvanized steel hardware for enhanced brand recognition in commercial applications. Simply share your technical drawings or specifications, and our engineering team will assist with prototyping and mass production.Request a quote from HST