Products
Explore our fastener catalog built for industrial reliability and project efficiency.
Heavy-Duty HDG Double End Studs for Industrial Flanges (DIN 938 / DIN 939)
HDG double end studs comply with DIN938/DIN939 and ASME B16.5, with smooth unthreaded middle shank for flanges, valves and pressure vessels. Centrifugal treatment removes excess zinc on dual threads; matched overtapped A194 2H nuts ensure smooth torque tightening. High-strength alloy studs adopt baking process to avoid hydrogen embrittlement. Thick zinc coating 50–85μm resists salt and abrasion, moisture-proof pallet packaging for petrochemical and desalination projects.
High-Strength HDG Stud Bolts & Fully Threaded Rods (DIN 976 / ASTM A193)
In heavy industrial piping, suspended MEP (Mechanical, Electrical, and Plumbing) infrastructure, and chemical plant construction, standard hex bolts a...
Heavy-Duty HDG Threaded Rods (1M, 2M, 3M & 12Ft All-Thread)
HDG all-thread rods comply with DIN975/DIN976, made of stress-relieved steel to avoid bending during hot-dip galvanizing. Vertical dipping & centrifugal treatment clear zinc residue inside threads for smooth nut assembly. Zinc coating ≥45μm delivers long-term anti-corrosion for HVAC suspension, chemical anchoring and timber construction. Bundled with waterproof wrapping and long wooden crates for 20GP shipment, matching overtapped nuts and DIN6334 couplers available, left-hand thread customization supported.
Heavy-Duty HDG Square Beveled Washers for Structural Beams (DIN 434 / 435)
HDG square bevel washers follow DIN434 (8% slope for channels) and DIN435 (14% slope for I-beams). Square edges lock against beam webs to prevent spinning during torque tightening. Pre-tumbled to remove burrs for smooth HDG coating without sharp zinc spikes. Inner holes pre-enlarged for easy assembly with structural bolts. 50–85μm zinc layer resists outdoor corrosion for steel workshops, crane girders and highway bridges, packed moisture-proof on pallets for sea export.
Heavy-Duty HDG Fender Washers for Maximum Load Distribution
HDG fender washers DIN9021 feature oversized outer diameter to disperse pressure and avoid thin metal/timber tearing. Stress-relieved steel prevents warping during galvanizing; centrifugal separation stops washers from sticking together. Inner holes pre-enlarged for smooth bolt assembly, edges tumbled to remove burrs. Zinc coating over 45μm fits solar frames, HVAC ducts and outdoor decking. Moisture-proof cartons & fumigation-free pallets for export, custom OD sizes available.
High-Strength HDG Spring Lock Washers (DIN 127B) – Engineered to Prevent Embrittlement
HDG split spring lock washers DIN127B are made of 65Mn spring steel. Strict short-time hot-dip galvanizing avoids annealing loss of elasticity, followed by 200°C baking for 4 hours to eliminate hydrogen embrittlement and prevent cracking. Centrifugal separation prevents interlocking and keeps split gaps unblocked. Zinc coating ≥45μm anti-corrosion for highway guardrails, solar trackers and vibrating pump flanges. Moisture-proof cartons & fumigation-free pallets for bulk export.
High-Strength HDG Flange Nuts (DIN 6923) – Precision Overtapped for Fast Assembly
HDG DIN6923 flange nuts integrate an integral washer to skip separate flat washers for faster assembly. Blank nuts are galvanized first then precision overtapped (+0.4~0.8mm) to avoid thread jamming with HDG bolts. Serrated or smooth flange base optional; centrifugal treatment keeps anti-vibration serrations unblocked. Thick zinc coating fits solar racks, highway guardrails and machinery. Moisture-proof cartons & fumigation-free pallets for sea shipment, only matched with hot dip galvanized bolts.
High-Strength HDG Heavy Hex Nuts (ASTM A194 2H / A563) – Precision Overtapped for Structural Joints
HDG heavy hex nuts comply with ASTM A194/A563/DIN6915, thicker and wider across flats for high torque with A325/A490 structural bolts. Galvanized blanks are CNC overtapped (+0.4–0.8mm) for smooth assembly without thread seizure. Internal bare threads get cathodic protection from HDG bolts. Heat-treated alloy steel meets Grade 2H/DH specs, no material grade counterfeiting. Widely used for pipeline flanges, steel bridges and machinery anchors, moisture-sealed cartons & pallets for sea export with full MTR certificates available.
Custom HDG Bolts & Non-Standard Fasteners: Engineered to Your Drawings
Factory supplies OEM custom HDG fasteners via cold heading, hot forging and CNC machining for non-standard sizes, special T-head, step bolts etc. Engineers adjust thread dimension offsets in advance to guarantee smooth fit after galvanizing. Samples & first article inspection before mass production. Fits new energy supports, ancient bridge renovation and mining machinery. Provide mold customization, moisture-proof pallet export packaging, accept CAD drawings or physical samples for reverse engineering.