Industrial Fasteners
Horizon Steel N Alloy manufactures and supplies heavy-duty industrial fasteners engineered to maintain absolute joint security under intense mechanical stress, high vibrations, and thermal cycling. From precision high-tensile stud bolts for pressure vessels to high-corrosion-resistant nut and bolt configurations, our products deliver exceptional proof load performance and thread integrity.
- High-Tensile ASTM A193 / A194 & Grade 8.8/10.9/12.9
- Standard & Fine Pitch Precision Threading
- Specialized Fluoropolymer (Xylan) & Galvanized Coatings
Available Materials & Grades
| Material Type | Fastener Specific Grades | International Specifications |
|---|---|---|
| High-Tensile Alloy Steel | Grade B7, B7M, B16, L7, L7M (For sub-zero and elevated temperatures) | ASTM A193, ASTM A320 |
| Stainless Steel | A2-70, A4-70, A4-80, B8 (Class 1 & 2), B8M (Class 1 & 2), B8T, B8C | ASTM A193, ASTM A194, ISO 3506 |
| Heavy Hex Nuts | Grade 2H, 2HM, 4, 7, 7M, 8, 8M (To match high-tensile studs perfectly) | ASTM A194 |
| Duplex & Super Duplex | UNS S31803 (F51), UNS S32750 (F53 / SAF 2507) | ASTM A276, A479 |
| High Nickel & Exotic Alloys | Inconel 625, Inconel 718, Hastelloy C276, Monel 400, Monel K500, Titanium Gr. 2/5 | ASTM B166, B574, B348 |
| Structural Carbon Steel | Grade 4.8, 5.6, 8.8, 10.9, 12.9, A325, A490 | ISO 898-1, ASTM A325 |
Comprehensive Technical Specifications
| Specification Parameter | Detailed Range & Capabilities |
|---|---|
| Fastener Types & Items | Stud Bolts (Fully Threaded), Heavy Hex Bolts, Socket Head Cap Screws (SHCS), Heavy Hex Nuts, Flat Washers, Spring Lock Washers, Threaded Rods, U-Bolts, and Anchor Bolts. |
| Size Dimensions |
Imperial (Inch Range): 1/4" up to 4" Diameter Metric Range: M6 to M100 Thread Sizes |
| Thread Forms & Pitches | UNC (Coarse), UNF (Fine), 8-UN (8-Thread Series standard for high-pressure piping), Metric Coarse, and Metric Fine. Precision rolled to ASME B1.1 and ISO 261 standards. |
| Manufacturing Methods | Cold forging / thread rolling for smaller diameters to maximize fatigue strength; Hot forging and precision CNC machining for large diameter heavy structural fasteners. |
| Surface Protective Coatings | Plain (Black/Oiled), Cadmium Plating, Zinc Plating (Trivalent Cr3+), Hot-Dipped Galvanized (HDG), Phosphate Coating, and Teflon/PTFE (Xylan 1014/1424) for anti-galling subsea environments. |
| Dimensional Standards | ASME B18.2.1 (Bolts), ASME B18.2.2 (Nuts), ASME B18.21.1 (Washers), DIN 931 / 933 / 934 / 912 / 125. |
| Testing, Inspection & Compliance | 100% Thread Go/No-Go Gauge validation, Proof Load Testing, Hardness Testing (Rockwell/Brinell), Charpy V-Notch Impact Testing (for low-temperature L7 grades), Magnetic Particle Inspection (MPI). 100% Traceability with EN 10204 3.1 Certification. |
Structural Types & Formats
Continuously Threaded Stud Bolts
Fully threaded rods combined with two heavy hex nuts. The primary mechanical joint configuration used to secure flange connections on high-pressure pipelines and process vessel manifolds.
Heavy Hex Structural Bolts
Features a heavy-duty hexagonal head with a wider bearing surface to distribute high clamping loads evenly. Essential for steel frameworks, heavy equipment assembly, and structural construction components.
Heavy Hex Nuts (2H / 8M)
Thicker and wider than standard nuts, engineered to withstand the extreme tensile loads of high-strength mating studs. Designed to resist thread stripping under high torquing operations.
Foundation & U-Bolts
Custom bent U-bolts designed to anchor process piping arrays to structural steel supports, alongside heavy-duty L-shaped and J-shaped anchor bolts embedded in concrete foundations.