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04new22
HaoRui
0422
This silicon carbide threaded nut is machined from sintered SiC — a material chosen when a fastener has to hold position in abrasive slurry, hot gas, or aggressive chemistry. Typical failure modes of stainless fasteners in these positions are galling and seizure, crevice corrosion at the thread root, and creep under thermal cycling. SiC removes all three.
The thread is cut and then verified with go/no-go gauges, so the nut mates with the mating stud or bolt without hand rework. Bodies can be supplied as plain cylinders, stepped shoulders, or with a machined hex / two-flat feature for wrenching, depending on how much torque the assembly needs to carry.
Because silicon carbide is hard and brittle, thread geometry matters more than it does in metal: we recommend a coarser pitch and a generous chamfer at the thread entry for parts that will be assembled and disassembled in service. Send the drawing and we will flag any feature that risks chipping before quoting.
Values are typical for SSiC and given for reference. Final properties, dimensions and tolerances are confirmed against the approved drawing and material grade of each order. Please state the working temperature, medium and load when requesting a quote.
Each point maps to a specific failure mode in service — not to a datasheet number.
Made from sintered silicon carbide (SSiC), depending on the selected grade. The material offers high hardness and strong wear resistance, suitable for fastening points where metal nuts degrade quickly under abrasion. Applications include pumps, mixers and mechanical equipment handling abrasive media.
Silicon carbide keeps its mechanical strength at elevated temperature, generally suitable for continuous service up to approximately 1400 °C depending on atmosphere and load. This makes the nut appropriate for furnace fixtures, thermal equipment and high-temperature process lines.
SiC resists most acids, alkalis and corrosive media where applicable, and does not gall or seize at the thread root the way stainless steel does. A practical choice for chemical processing equipment, corrosive fluid lines and wash-down environments.
Internal threads are machined to customer specifications — thread type, pitch and tolerance produced to drawing, then verified with go/no-go gauges. Tolerances down to ±0.01 mm are achievable on machined surfaces where applicable. Custom dimensions and small trial batches are welcome.
Compared with alumina ceramics, silicon carbide provides higher thermal conductivity and better resistance to thermal shock, depending on grade and geometry. Its low density also reduces component weight in rotating and reciprocating assemblies.
Silicon carbide is electrically semi-conductive — it is not an insulator. If the nut must isolate current or sit in a high-voltage assembly, specify 99.5 % alumina instead; we machine both and will recommend the correct material from your application conditions.
Compare with alumina ceramic nuts →Custom ceramic parts are specified by working condition, not by catalogue size. These are the six most common conditions we quote against.
Fastening of wear plates, seats and liners in slurry and acid service, where stainless hardware corrodes or seizes.
Load-bearing joints in sintering furniture and high-temperature racks that see repeated thermal cycling.
Non-metallic fastening inside etch, clean and rinse modules where metal contamination is not permitted.
Clamping and positioning in smelting lines and hot rolling areas exposed to scale, heat and abrasive dust.
Fixing of nozzles, baffles and wear liners in desulphurisation and effluent treatment equipment.
Threaded clamping of ceramic fibre modules, heating elements and thermocouple protection hardware.
Four steps, no surprises at the end of them.
We review the STEP/PDF drawing and flag thread relief, chamfer and wall-thickness risks within one business day, together with a quoted price.
Samples are machined from the agreed grade by diamond grinding and CNC turning, typically within 2–4 weeks depending on drawing and quantity.
Dimensional report with thread gauge results and material data, issued before shipment so you can approve without waiting for the box.
Series runs with lot traceability, protective packaging for brittle parts, and shipping arranged EXW or FOB Shenzhen.
