Castle Nuts | THREAD Industrial Precision Cold-Formed Fasteners
THREAD INDUSTRIAL CO., LTD. is a premier manufacturer of high-quality Castle Nuts and Slot Nuts, engineered for secure locking in demanding applications. Produced via a precision cold-forming process, these fasteners are available in sizes from M6 to M33 (1/4" to 1 1/4") and are made from various durable carbon steels. With IATF 16949 certified facilities in Taiwan and Vietnam, we guarantee consistent quality and large-scale production capacity, delivering reliable fastening solutions for automotive, machinery, and industrial sectors worldwide. Choose THREAD Industrial for precision cold-formed fasteners, certified quality management, and drawing-based manufacturing support.
Castle Nuts
High-Tensile Castle Nuts & Slot Nuts | Cold-Formed Carbon Steel Fasteners
THREAD INDUSTRIAL CO., LTD. is a premier manufacturer of high-quality Castle Nuts and Slot Nuts, engineered for secure locking in demanding applications. Produced via a precision cold-forming process, these fasteners are available in sizes from M6 to M33 (1/4" to 1 1/4") and are made from various durable carbon steels. With IATF 16949 certified facilities in Taiwan and Vietnam, we guarantee consistent quality and large-scale production capacity, delivering reliable fastening solutions for automotive, machinery, and industrial sectors worldwide.
Precision Engineered for Secure Fastening
Our Castle Nuts and Slot Nuts are meticulously manufactured to provide reliable locking performance in critical assemblies. The slotted design allows for the insertion of a cotter pin or safety wire, effectively preventing the nut from loosening under vibration or torque. This makes them an ideal choice for automotive, aerospace, and heavy machinery applications where safety and stability are paramount.
Advanced Manufacturing & Quality Assurance
Leveraging advanced cold-forming technology, THREAD INDUSTRIAL produces fasteners with exceptional dimensional accuracy and superior mechanical strength. As an IATF 16949 and ISO 9001 certified manufacturer, we adhere to the strictest quality control standards. Every batch undergoes rigorous testing in our TAF & ISO/IEC 17025 accredited laboratory to ensure it meets or exceeds industry specifications for performance and durability.
Product Specifications & Capabilities
| General Specifications | |
|---|---|
| Product Type | Castle Nuts, Slot Nuts |
| Manufacturing Process | Cold Forming |
| Material | Various Carbon Steels |
| Available Size Range by Facility | ||
|---|---|---|
| Taiwan Factory | ||
| Metric | M6 - M33 | |
| Imperial | 1/4" - 1 1/4" | |
| Vietnam Factory | ||
| Metric | M5 - M27 | |
| Imperial | 1/4" - 1" | #10 - 1" |
Castle Nuts Precision Cold-Formed Fastener
THREAD Industrial manufactures Castle Nuts for automotive, industrial equipment, construction, infrastructure, and machinery applications, with production support from Taiwan and Vietnam.
Product requirements can include international standards, customer drawings, metric or imperial sizes, carbon or alloy steel, defined strength classes, and application-specific surface treatment.
IATF 16949 and ISO 9001 systems, accredited laboratory testing, controlled production, and optical sorting help buyers source consistent fasteners for quality-critical and repeat-order programs.