Hebei Kappa Metal Products Co., Ltd. is one of the most reliable manufacturers and suppliers of self tapping screw zinc plated m6 x 19mm for automotive bumper fender mudguard and engine cover trim fastening in China. Welcome to buy bulk high quality self tapping screw zinc plated m6 x 19mm for automotive bumper fender mudguard and engine cover trim fastening made in China here from our factory. If you have any enquiry about cooperation, please feel free to email us.
Products Description
Material
Manufactured from low carbon steel with a bright zinc electroplating finish. The plating thickness ranges between 5 to 8 microns, offering protection against red rust for up to 120 hours in neutral salt spray testing.
Dimensions and Thread
Nominal diameter M6 with a thread pitch of 1.0mm. Overall length measures 19mm from the underside of the head to the tip. The self tapping point includes a 45 degree taper with a clean starting thread that engages smoothly with existing holes or pilot holes as small as 4.8mm.
Drive and Seating
The head diameter spans 11.5mm with a depth of 3.2mm, providing sufficient clamping surface for plastic and composite panels. The integrated bonded sealing washer beneath the head compresses against the mounting surface, minimizing vibration loosening and preventing water ingress around the fastener point. Breakaway torque typically ranges between 3.5 and 4.2 Nm, offering consistent tightening feedback during manual or pneumatic tool operation.
Pain Points We Address
*Stripped threads and loose trim panels after repeated removal and reinstallation. The thread forming capability of this screw cuts fresh engagement paths even in worn plastic holes, extending the service life of your original mounting points.
*Corrosion and rust staining on visible exterior fasteners. The zinc plating combined with a clear trivalent passivation layer keeps hardware looking clean through seasonal weather changes and road salt exposure.
*Inconsistent clamping pressure causing panel gaps and rattles. The bonded washer maintains even compression across the mounting surface, reducing the need for retorquing after assembly.
*Mismatched screws that fail to self tap properly, leading to cross threading and damaged clips. The 45 degree point geometry ensures straight entry and reduces installation effort by approximately 30 percent compared to standard blunt tip screws.
Factory Capability
Our production facility operates four fully automated cold heading lines with a monthly output capacity exceeding 8 million pieces for M6 and M8 automotive fasteners. Each batch undergoes dimensional inspection using laser micrometers with a tolerance range of plus or minus 0.05mm on thread diameter and plus or minus 0.15mm on overall length. Hardness testing is performed on every production lot, maintaining a core hardness between 220 and 280 HV, consistent with property class 8.8 requirements for self tapping applications. Salt spray testing is conducted weekly on plated samples, with documented results averaging 135 hours before white rust formation and 180 hours before red rust appearance, exceeding the standard industry benchmark of 96 hours for automotive exterior fasteners.
Customization Services
*Head drive configurations available including Torx, hex flange, and slotted flat head options to match your assembly tooling requirements.
*Plating finishes beyond standard zinc including yellow zinc dichromate, zinc nickel alloy, and black oxide with wax sealer for specialized corrosion protection up to 300 hours salt spray.
*Size (Dia*Length)：We can produce according to your requirements or samples.
*Packaging ：We can customize packaging size, style, and logo printing according to your needs or market planning.
Minimum order quantity for custom variations starts at 20000 pieces with sample tooling available within 7 working days. Production lead time for standard custom orders averages 20 to 25 working days after sample approval.
Shipping and Logistics
In stock items ship within 48 hours of order confirmation via DHL, FedEx, or UPS for express delivery. Standard air freight transit times range from 5 to 7 working days to North American destinations and 6 to 9 working days to major European hubs. Sea freight options are available for bulk orders.
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