Grade 5 UNC-UNF Black Oxide Stud Ejeunc-UNF

Grade 5 UNC-UNF black oxide stud made of grade 5 carbon steel, used in mechanical assemblies requiring more strength than grade 2, spare parts and adjustable fastenings. TECTUL presents it with actual lot sizes and the attribute that avoids confusion: it differs from grade 2 by its higher strength class and mixed UNC-UNF thread. The purchase specification must confirm diameter, effective length, thread pitch, finish and compatible nut, because in industrial fasteners a pitch mismatch can prevent assembly or reduce actual tightening load. For inch studs and rods, the UNC or UNF thread families of ASME B1.1 are used as a reference; for metric thread, verify M diameter, pitch and the class indicated on the drawing or sample. If the product works in a flange, support, equipment or spare part, select by service condition and not only by visual similarity. This sheet prioritizes fast identification, thread compatibility and technical quotation for industrial buyers in Colombia.

Installation recommendations

• Confirm the thread with a reference nut or gauge before installation, especially when UNC, UNF and metric threads are mixed.
• Clean the thread and remove dents or burrs that could distort the actual tightening load.
• Use nuts and washers compatible with the material, grade and finish of the stud or threaded rod.
• Apply the torque or tightening method specified by the joint design; do not generalize values across services.
• For outdoor or corrosive environments, verify whether zinc plated, hot-dip galvanized or stainless finish is sufficient for the exposure.

We dispatch to Bogotá, Medellín, Cali, Barranquilla and all of Colombia. Request a quote via WhatsApp at TECTUL indicating size, quantity, finish and whether you need a certificate, compatible nut or cut-to-size service for grade 5 UNC-UNF black oxide stud.