Description
Hex Socket Button Head Screw M3x12, Grade 10.9, 7380-1 — BOLTON SKU 64448.
About the Hex Socket Button Head Screw M3x12
ISO 7380-1 specifies button head screws with a hexagon socket: a low, domed head with a wide bearing face, driven by an internal hexagon key. This variant has an M3 thread with the ISO metric coarse pitch of 0.5 mm and a 12 mm length under the head, and takes a 2 mm hexagon key. The head stands proud of the surface but is far shallower than a socket cap head, so it is chosen where clearance above the joint is limited or where a rounded, snag-free profile is wanted. The wide head also spreads bearing load over a larger area than a cap screw of the same thread size, which helps on slotted joints and softer materials. Property class 10.9 to ISO 898-1 denotes a nominal tensile strength of 1000 MPa for the screw material; in a button head design the shallow head, rather than the thread, is normally the limiting feature of the fastener. The item is catalogued as screw hex skt btn M3x12.
Key specifications
| Attribute | Value |
|---|---|
| Standard | ISO 7380-1 (button head screws with hexagon socket) |
| Thread | M3 x 0.5 (ISO metric coarse) |
| Nominal length | 12 mm |
| Head form | Button, low dome with wide bearing face |
| Drive | 2 mm hexagon key |
| Property class | 10.9 to ISO 898-1 (nominal tensile strength 1000 MPa) |
| BOLTON SKU | 64448 |
Typical applications
M3 x 12 button head screws are used for panel and cover fixings, guard and trim attachment, and equipment mounting where a low, rounded head avoids snagging cables, hoses or hands. The wide head suits clearance holes and slots through which a cap head could pull. Required finish, plating or coating should be stated on the RFQ, since the listing fixes the geometry and property class but not the surface treatment.
Supplied by BOLTON Technical Equipment Supplies against request for quotation. Add this item to your RFQ basket to request pricing, lead time and documentation requirements (e.g. CoC, datasheets or test reports where applicable).
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