Gutebang 840Pcs.M2 M3 M4 M5 Hex Socket Head Cap Screws Bolts, Nuts, Flat 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. Product Features 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. Shipping: Shipping is complimentary within the lower 48 US States. We Do Not Ship to PO/APO Boxes, HI or Alaska We Do Not Ship Outside of the Continental US All items ship within 24-72 hours of Payment For large items that require Freight shipping a valid phone number is required to call and schedule your delivery Terms of Sale and Feedback: Feedback is extremely important to us and If you are satisfied with our transaction, please take a moment to leave Positive Feedback. YOUR Satisfaction is our #1 Priority! If there are any issues, PLEASE contact us BEFORE leaving a neutral or negative rating so that we may resolve any concerns. We PROMISE we can make you happy if you give us a fair chance. Returns / Concerns: All items qualify for returns within 14 - 30 days of receipt. Buyer is responsible for return shipping on any item that is not damaged Please be sure this is an item you want before making your purchase. Customer Satisfaction is our TOP priority! All items are IN STOCK at time of listing. Inventory changes constantly and it is impossible to maintain a perfectly accurate count of all items. Please do not penalize us if we have to issue you a refund! Thank You For Your Business!