Metric Fully Threaded Allen Hex Drive, Black Oxide Finish 12.9 Grade Alloy Product Details The material is made of high quality 12.9 Grade alloy steel. Their surfaces are treated with black oxide, which has excellent corrosion resistance, firmness, wear resistance and low temperature resistance. Widely used in various precision machinery industries, classified instruments, meters, electronic products, household appliances, communication products, automobiles, locks, lamps, toys and so on. Specifications: Head Style: Socket Head Quantity: 840PCS Material: 12.9 Grade Alloy Steel Main Color: Black Package Included: M2 x 8mm (25PCS) M2 x 12mm (25PCS) M2 x 16mm (25PCS) M2 x 20mm (25PCS) M2 Nuts (100PCS) M2 Flat Washers (100PCS) Allen Key (1PCS) M3 x 8mm (20PCS) M3 x 12mm (20PCS) M3 x 16mm (20PCS) M3 x 20mm (20PCS) M3 Nuts (80PCS) M3 Flat Washers (80PCS) Allen Key (1PCS) M4 x 8mm (15PCS) M4 x 12mm (15PCS) M4 x 16mm (15PCS) M4 x 20mm (15PCS) M4 Nuts (60PCS) M4 Flat Washers (60PCS) Allen Key (1PCS) M5 x 8mm (10PCS) M5 x 12mm (10PCS) M5 x 16mm (10PCS) M5 x 20mm (10PCS) M5 Nuts (40PCS) M5 Flat Washers (40PCS) Allen Key (1PCS) Package Quantity: Total: 840 PCS, M2 M3 M4 M5 Hex Socket Head Cap Screws Nuts Flat Washers Assortment Set Warranty: Whenever you need us, please contact us by email or Q A. We will provide you with professional services and reply to you as soon as possible. If you are not satisfied with the product, you can get a full refund, and you can buy it with confidence. High quality: It is made of high quality 12.9 grade alloy steel, and the surface is treated with black oxide. They have excellent corrosion resistance, firmness, wear resistance and low temperature resistance. This kit can be widely used in all kinds of precision machinery, classified instruments, instruments, electronic products, household appliances, communication products, locks, lamps, lights, toys, etc. Packing Quantity: 840pcs, Packed in A Rugged Convenient Re-sealable Plastic Storage Case. Package Included: M2 M3 M4 M5 Hex Socket Head Cap Screws Nuts Flat Washers Assortment Set Whenever you need us, please contact us by email or Q A. We will provide you with professional services and reply to you as soon as possible. If you are not satisfied with the product, you can get a full refund, and you can buy it with confidence. Payment We accept PayPal and credit cards via PayPal. Taxes - US We collect sales tax, as required by law. Shipping We make every effort of shipping within 3 business day of payment clearing. The estimated delivery time is 2 - 5 business days from the shipping date. Policies If you do need to return your item, please contact us via email (you will receive an email when your product ships with additional details - Subject: Important information about your purchase). You will then be provided with a return shipping label and packing slip. Pack the item carefully. Include the packing slip, apply the shipping label, and return the item within 30 business days of the date you request a return, or your return will be canceled. Once we receive your order we will inspect the return. Please allow up to 5 business days of receiving the returned item for your refund.