Phillips Head Hex Bolt Combination Screws
The washer has a anti-fall design. The axial pull-out force is ≥50 N. The parts will not separate during shipping or vibration. We take an M8×1.25 size at grade 8.8 as an example. The recommended torque is 20-25 N·m. This gives a safe lock without damaging the thread.
Save Time with Our Combination Screws
Do you work on an assembly line? Taking a screw and then a washer costs a lot of time. Our Combination Screws come with the screw and washer pre-assembled. They give you both a Phillips slot and an external hex drive. If the Phillips slot wears out, the hex drive still works. We are a Shanghai factory. We have supplied fasteners for 20 years.
Check Our Pull-out Data and Performance Levels
The washer has a anti-fall design. The axial pull-out force is ≥50 N. The parts will not separate during shipping or vibration. We take an M8×1.25 size at grade 8.8 as an example. The recommended torque is 20-25 N·m. This gives a safe lock without damaging the thread. The size range is M3 to M10. Carbon steel gets carburizing or heat treatment. Strength grades are up to 8.8 or 10.9. Tensile strength is ≥800 MPa. Yield strength is ≥640 MPa. Thread precision is 6g. This ensures a smooth fit with nuts or inner threads. You can choose a spring washer, a flat washer, or both. We offer stainless steel SUS304 and carbon steel 10B21 or SWRCH35K. Surface finish includes black oxide, cleaning, zinc plating, or nickel plating. Zinc plating comes in white, blue-white, or yellow. Salt spray test lasts 48-72 hours.
|
Parameter |
Standard / Value |
|
Axial Pull-out Force |
≥ 50 N |
|
Recommended Torque (M8, 8.8 grade) |
20-25 N·m |
|
Strength Grade Options |
8.8 or 10.9 |
|
Tensile Strength (10.9 grade) |
≥ 1000 MPa |
Why Our Machines and Delivery Work for You
We have thread rollers, automatic lathes, CNC lathes, and cold heading machines. We also have a full automatic packing machine. Mass production takes 2-3 weeks for standard parts. Custom products take 4 weeks. Repeat orders are even faster. Cold headed parts start at 50,000 pieces. Free samples are ready for stock items. We pack with cartons. Inside we use plastic bags or boxes for separation. Payment is 30% deposit and 70% balance. We take US dollars.
The entire product line is fully customizable.
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