OEM 2-56 4-40 6-32 8-32 M2 M3 M4 M5 18-8 Stainless Steel SS304 Blue Nylon Patch Nylock Screw Phillips Cross Recess Button Pan Head Sealing Screw with Rubber Washer

We provide one-stop OEM customized anti-loose waterproof sealing screws, covering inch UNC sizes (2-56, 4-40, 6-32, 8-32) and metric sizes (M2, M3, M4, M5). They fit precision electronics, automotive parts and general mechanical assembly scenarios.

All screws adopt high-quality 18-8 SS304 stainless steel.

• Strong rust, acid and corrosion resistance
• Stable performance under humid, high/low temperature and corrosive environments
• Extend the service life of your assembled equipment

• Phillips cross recess design: Compatible with hand screwdrivers and electric screwdrivers for fast assembly
• Button pan integrated head: Smooth curved surface, no scratches on equipment shells
• Pre-attached matching rubber washer: No extra spare gaskets needed, directly realize dustproof, leakproof and waterproof sealing after tightening

Threads are evenly coated with blue nylon patch to form standard nylock self-locking structure.

• Extra friction formed after tightening
• Effectively prevent loosening & displacement caused by vibration, impact and temperature changes
• Improve long-term assembly stability and product safety

We support full personalized customization based on your drawings, samples and order quantity:

• Adjustable screw overall length
• Custom nylon patch coating range
• Variable rubber washer thickness
• Custom surface treatment
• Neutral or brand exclusive packaging

Founded in 1998, YH FASTENER is an integrated R&D, production, sales and service hardware fastener factory. We produce standard & non-standard fasteners compliant with GB, ANSI, DIN, JIS, ISO standards.

Two independent production parks:

• Dongguan Base: 8,000 ㎡ standardized workshop
• Lechang Intelligent Park: 12,000 ㎡ production workshop

Equipped with full set professional production equipment: cold heading machines, multi-station forming machines, thread rolling machines, CNC lathes, precision stamping machines and dedicated nylon coating lines.

Independent separate workshops for screws, washers, nuts, lathe parts and stamping components to guarantee production efficiency.

Four core professional teams: R&D technical team, quality inspection team, domestic & overseas sales team, after-sales service team.

Full-process quality inspection:

• Roller screening to separate mixed materials
• Optical sorting machine for full-size inspection
• Manual full appearance inspection

Full range test machines for all batch performance verification:

• Mechanical test: Hardness tester, torque meter, dynamometer
• Coating test: XRF film thickness gauge
• Environmental & corrosion test: Salt spray tester, constant temperature & humidity chamber
• Dimensional inspection: 2D measuring instrument, micrometer, height gauge

System certifications: ISO9001, ISO14001, IATF16949

Environmental standards: All products meet RoHS & REACH

Products exported to over 40 countries. Long-term cooperative brands include Huawei, Xiaomi, SONY, CATL, Foxconn, Hisense, Jabil, Fastenal, etc.

Applied industries: 5G communication, aerospace, power storage, new energy vehicles, security, AI equipment, medical devices, sports equipment.

Adhere to the principle: Quality First, Customer Satisfaction, Continuous Improvement, Pursuit of Perfection.

Supply one-stop customized hardware solutions including screws, washers, nuts, CNC turning parts and stamping parts, create greater value for global buyers.