Technical Specifications Standard: ASME B18.31.3 (Inch Series) Material Grades: ASTM A320 Grade L7 (Threaded Rods); ASTM A194 Grade 7L (Matched Heavy Hex Nuts) Mechanical Properties: Tensile Strength (), Yield Strength (), Charpy V-Notch impact tested at (). Thread Profiles: UNC (Unified Coarse), 8-UN (8-Thread Series) Surface Finish: Hot-Dip Galvanized (HDG) strictly compliant with ASTM F2329 and ASTM A153 specifications. Size & Length: Diameter: 1/4" up to 2-1/2"; Length: 3ft, 6ft, 10ft, 12ft (or precision cut-to-length based on blueprints). Thread Fit: Class 2A before coating; meticulously clearanced to accommodate the zinc thickness and ensure smooth assembly with overtapped HDG nuts on-site. Key Product Highlights Proven Cryogenic & Low-Temp Reliability: Our L7 rods and 7L nuts undergo rigorous Charpy V-Notch impact testing to guarantee high structural integrity and fracture toughness, eliminating brittle failure risks under cryogenic conditions down to () or lower. Heavy-Duty Marine Corrosion Resistance: The specialized HDG coating exceeds 50 microns () in thickness, creating a dense metallurgical bond that shields the steel core. It ensures decades of rust-free service even in harsh offshore, coastal, and high-salinity marine environments. Tailored Thread Clearance for Easy Installation: To compensate for the heavy zinc layers, our thread rolling process is micro-adjusted to guarantee seamless, binding-free nut engagement on-site, significantly speeding up construction timelines and minimizing labor friction.

Key Product Highlights Precision Threading: Continuous, precision-rolled threads along the entire length ensure smooth nut assembly and even load distribution without binding. Material Versatility: ASTM A307: Perfect for cost-effective, everyday construction, pipe hanging, and general fabrication. ASTM A193 B7: Engineered for high-pressure, high-temperature, and high-tensile environments such as oil & gas, petro-chemical, and heavy machinery structural joints. Superior Appearance: The specialized Bright Finish ensures the rods are free from scale, burrs, or heavy black oxides, making them easier to handle and visually appealing for retail or high-end engineering applications. Strict Quality Compliance: Tested for chemical composition, tensile strength, and thread accuracy to match international engineering standards. Typical Applications Construction & Infrastructure: Anchoring, concrete forming, steel structure framing, and truss tie-rods. Piping & Flange Connections: Ideal for fluid handling systems and valve installations (especially A307 Grade B for cast iron flanges and B7 for high-pressure steel flanges). Electrical & HVAC: Overhead hanging of cable trays, ductwork, and conduit systems. General Manufacturing: Used as spacer rods, heavy-duty studs, or adjustable bracing components.

Product Overview: Our ASTM A193 B7/B7M short threaded rods are designed for high-stress applications requiring both mechanical strength and enhanced surface protection. These rods are manufactured from quenched and tempered Chromium-Molybdenum alloy steel. The Yellow Zinc finish provides a thicker protective layer and superior salt spray resistance compared to standard clear zinc. The B7M version is precision-treated to a maximum hardness of 22 HRC for specialized use in sour gas (H2S) environments. Key Features: • Superior Corrosion Resistance: The Yellow Zinc (Cr6+ or Cr3+ options) coating provides an extra layer of protection against moisture and industrial chemicals. • Specialized Heat Treatment: B7M variants are strictly monitored to meet safety standards for stress-corrosion cracking resistance. • Precision Short-Cut: Professionally cut to specific lengths with clean, chamfered ends for immediate, hassle-free installation. • Full Traceability: Every shipment is backed by a Material Test Certificate (MTC) ensuring compliance with ASTM A193.

Get your high-strength fasteners directly from the source. As a leading manufacturer specializing in alloy steel products, we provide ASTM A193 B7/B7M long threaded rods with the reliability and scale required for global industrial procurement. • Direct Manufacturer Advantage: Skip the distributors. By sourcing directly from our factory, you secure the most competitive wholesale pricing in the market. • Scale of Production: With a supply capacity exceeding 30,000 MT per month, we are equipped to handle large-scale container orders and tight project deadlines. • Industrial Cost-Efficiency: Our plain-finish rods offer the best value for bulk buyers who require high-strength performance without the additional cost of plating. • Expert Logistics: We provide professional anti-rust oiling and sea-worthy packaging to ensure your products arrive in perfect condition.