DIN653 Knurled Thumb Screw Large Flat Head Self-Threading

China factory-direct supply of DIN653 knurled head screws. Our production facility specializes in a full range of fasteners, with standard delivery in 20–25 days and expedited delivery in 7–15 days. Located just 35 kilometers from Ningbo Port, we offer highly convenient export logistics. In-stock items can be delivered to the warehouse the same day.

Manufactured in strict compliance with DIN 653 specifications, these knurled thumb screws guarantee dimensional accuracy and interchangeability. Available in high-strength carbon steel (with zinc plating or black oxide finish) or corrosion-resistant stainless steel (A2/AISI 304 or A4/AISI 316), they withstand demanding environments, vibration, and repeated handling. The large knurled head is ergonomically designed for comfortable, slip-resistant operation, even with gloves.

Our precision-manufactured DIN653 large flat knurled head screws provide the ideal solution for applications requiring frequent adjustment, tool-free assembly, or reliable access in confined spaces. Featuring a wide, flat head with deep diamond-pattern knurling, these screws deliver exceptional finger grip and torque transmission — eliminating the need for tools and accelerating assembly and maintenance processes.

We offer comprehensive OEM and ODM services to meet your specific requirements:

• Custom head styles, drive types (Phillips H / Pozidriv Z), and thread designs
• Special lengths, diameters, and tolerances
• Specific material grades and surface finishes
• Custom packaging with your branding (labels, boxes, bags, blister packs)
• Logo engraving on screw heads

• Professional fastener manufacturer with over 10 years of export experience
• Advanced automatic cold heading and thread rolling equipment ensuring consistent quality and fast delivery
• Strict quality control system from raw material sourcing to finished product
• Competitive factory-direct pricing with no middlemen
• Responsive customer service and technical support
• Flexible MOQ to accommodate both trial orders and bulk shipments

Screws are packed in neutral packaging boxes with standard quantities arranged in small cartons. Custom packaging configurations are available upon request. Small cartons are consolidated into larger master cartons for secure transportation. Palletized units are wrapped with waterproof film and reinforced with packaging straps, with custom shipping marks available.