Common Standards for Button Head Hex Socket Screws
Button-head hex socket screws are commonly used when a low-profile, rounded head is preferred. When looking for these screws, buyers may come across ISO 7380, DIN 7380, DIN EN ISO 7380, and ASTM F835.
These standards are related to button head screws, but they are not interchangeable. As a professional hex socket screw manufacturer, Xinchi Fastener Factory takes a look at some of the common standards for button head hex socket screws below.
Button Head Hex Socket Screws
ISO 7380 Button Head Hex Socket Screws
ISO 7380 is a common standard for metric button head hex socket screws.
ISO 7380-1:2022 covers hexagon socket button head screws with reduced loadability. It includes steel and stainless steel screws with metric coarse threads, generally from M3 to M16.
ISO 7380-2:2022 covers a similar screw design with a collar.
When ordering ISO 7380 button head hex socket screws, the thread size, length, material, property class, and surface finish should also be specified.
Button Head Hex Socket Screws
DIN EN ISO 7380 and DIN 7380
In Germany, customers may specify DIN EN ISO 7380-1 or DIN EN ISO 7380-2. These are the German adoptions of the corresponding ISO standards.
The term DIN 7380 is also commonly seen in fastener catalogs and customer inquiries. If an inquiry only mentions DIN 7380, it is better to check the drawing or detailed specification before production.
For metric button head screws, DIN EN ISO 7380 and ISO 7380 are closely related.
Button Head Hex Socket Screws
ASTM F835 Button Head Socket Screws
ASTM F835 is not a direct equivalent of ISO 7380.
ASTM F835-23 covers alloy steel socket button, low and flat countersunk head cap screws. It is mainly used for inch-series fasteners and includes requirements for dimensions and mechanical properties.
For this reason, an ASTM F835 request should be checked separately. The required size, thread, material, strength, and finish should be confirmed before quoting or production.
Button Head Hex Socket Screws
Choosing the Right Button Head Hex Socket Screws
For metric button head hex socket screws, ISO 7380-1 is a common specification. For the version with a collar, ISO 7380-2 applies.
German customers may use DIN EN ISO 7380 on drawings or purchasing documents, while DIN 7380 may appear as a shorter reference.
For ASTM F835 screws, the customer’s complete specification should be followed rather than selecting a screw only by its head shape.
Before ordering, it is useful to confirm the thread, length, material, surface finish, standard, and quantity.
Xinchi Fastener Factory for Button Head Hex Socket Screws
Xinchi Fastener Factory has been manufacturing fasteners since 2007. The factory has 102 cold heading machines and a production capacity of more than 10 million pieces per day.
Xinchi Fastener Factory
The new factory covers 30,000 m² and includes two six-story buildings. Xinchi supplies button head hex socket screws as well as socket head cap screws, flat head socket cap screws, T nuts, threaded insert nuts, rivet nuts, bolts, washers, and other fasteners for customers worldwide.