Kozelo 40pcs Button Head Socket Cap Screws - [M4-0.7x25mm] Zinc-Nickel Coated Good for Automotive, Marine & Outdoor Use Road Bicycle, Mountain Bike, Motorcycle - Alloy Steel - Black

• 1- PACKAGE CONTENTS - Color: Black; Material: Alloy steel; Finish: Zinc-nickel; Thread Type: Coarse Thread; Thread Dia.: M4; Thread Length: 25mm/0.98"; Head Size: 7.6x2.2mm/0.3x0.09"(Dia.*T); Hexagon Width: 2.5mm / 0.1"; Package Content: 40pcs x Button Head Hex Socket Screws (with a spanner) 
• 2- MATERIAL - Button head cap screws are made from Alloy steel with a zinc-nickel coating, which provides enhanced corrosion resistance (over 400 hours neutral salt spray test) compared to standard black oxide finishes. This ensures reliable performance and appearance under harsh conditions like humidity, salt, or high temperatures, reducing maintenance and replacement costs.
• 3- Work Environment - zinc-nickel coated button head socket cap screws are ideally suited for demanding environments where superior corrosion resistance is critical. They excel in high-humidity outdoor applications, salt-laden coastal or de-icing settings, and high-temperature areas near machinery or engine compartments. This makes them a reliable and durable fastening solution for industries ranging from marine and automotive to construction and beyond.
• 4- Applications -Button Head Socket Cap Screws feature a low-profile, rounded dome head that provides a sleek and safe finish. Unlike flat heads, they sit above the surface without needing a countersunk hole, and offer a lower, smoother profile than socket head cap screws, making them for applications in fitness equipment, bicycles.
• 5- TAKE NOTICE OF - Please refer to the image of SIZE and choose the Screws suitable for your project.

BUTTON HEAD SOCKET CAP SCREWS APPLICATION Button Head Socket Cap Screws feature a low-profile, rounded dome head that provides a sleek and safe finish. Unlike flat heads, they sit above the surface without needing a countersunk hole, and offer a lower, smoother profile than socket head cap screws, making them for applications in fitness equipment, bicycles. ABOUT THIS BUTTON HEAD SCREWS Upgrading from black oxide to a zinc-nickel coating offers a leap in corrosion resistance. While black oxide provides minimal protection against rust, zinc-nickel can withstand over 400 hours in a neutral salt spray test, offering superior performance. Additionally, zinc-nickel boasts excellent heat resistance (withstanding over 200°C) and better abrasion resistance. This makes it a far more robust and durable choice for demanding applications in harsh environments. SPECIFICATION Color: Black Material: Alloy steel Finish: Zinc-nickel Thread Type: Coarse Thread Thread Dia.: M4 Thread Length: 25mm/0.98" Head Size: 7.6x2.2mm/0.3x0.09"(Dia.*T) Hexagon Width: 2.5mm / 0.1" Package Content: 40pcs x Button Head Hex Socket Screws (with a spanner) NOTE -Please refer to the image of SIZE and choose the Screws suitable for your project.