阿曼采购需求：软管电缆接头、导管电缆接头、防爆电缆接头、M40电缆接头、直角电缆接头、电缆接头

I'm looking for a reliable supplier for cable glands that meet specific requirements. I need cable glands with metric threads, specifically the M20 size, with a length of 15mm. The requested quantity is 300 pieces. The material preference is polyamide, and I'd like these to be in black. Additionally, I'm interested in tie wraps to accompany the cable glands in this order. Please provide details on pricing, lead times, and any available certifications for the products. If you have any recommendations or alternatives within the same specifications, feel free to include that in your response. Looking forward to your quick feedback so we can proceed smoothly.