PRODUCTButton Head Socket Screw ISO 7380-1 Alloy Steel and Stainless Steel Fastener for Machinery Furniture and Equipment Panel Assembly
ISO 7380-1 Button Head Socket Screws have a low-profile domed head and an internal hex drive for machinery, equipment panels, furniture, molds, and sheet-metal assemblies. Material options are alloy steel and stainless steel. The standard reference covers metric threads from M3 to M16. Send your required diameter, length, material, and quantity to confirm availability and request a quotation.
- Dimensional Standard
- ISO 7380-1:2022
- Material Options
- Alloy Steel, Stainless Steel
Product Details
The ISO 7380-1 Button Head Socket Screw is a metric socket screw with a domed button head and an internal hex drive. Its low-profile head provides a smooth external appearance and is intended for fastening positions that do not require the bearing area of a standard cylindrical socket head.
The standard reference in this product page is ISO 7380-1:2022. It covers metric coarse threads from M3 through M16. The button head has a different external profile and head bearing area from a standard cylindrical head, so the connection design and permissible load should be checked before substitution.
For machinery, mold, furniture, equipment-panel, and sheet-metal orders, provide the required screw dimensions together with the material and mechanical requirements. A drawing or assembly description helps confirm head clearance, tool access, and the intended fastening position.
Product Specifications
| Item | Details |
|---|---|
| Product Name | Button Head Socket Screw |
| Dimensional Standard | ISO 7380-1:2022 |
| Material Options | Alloy Steel, Stainless Steel |
| Head Type | Domed Button Head |
| Drive Type | Internal Hex Socket |
| Thread Type | Metric Coarse Thread |
| Thread Diameter — Standard Reference | M3–M16 |
| Screw Length l | Measured from beneath the head to the screw tip; specify the required length for quotation |
| Material Grade and Finish | Specify requirements for confirmation |
| Main Applications | Machinery, Molds, Furniture, Equipment Panels, Sheet-Metal Assembly |
| Packaging | Carton or Bag Packing |
ISO 7380-1 Reference Dimensions
All dimensions are in millimeters.
| Thread Size d | Pitch P | Thread Length b, Ref. | Head Diameter dk, Max. / Min. | Head Height k, Max. / Min. | Hex Socket s, Nom. / Max. / Min. | Socket Depth t, Max. / Min. | Socket Across-Corners e, Min. |
|---|---|---|---|---|---|---|---|
| M3 | 0.5 | 18 | 5.7 / 5.4 | 1.65 / 1.40 | 2.0 / 2.08 / 2.02 | 1.20 / 1.04 | 2.30 |
| M4 | 0.7 | 20 | 7.6 / 7.24 | 2.20 / 1.95 | 2.5 / 2.58 / 2.52 | 1.65 / 1.30 | 2.87 |
| M5 | 0.8 | 22 | 9.5 / 9.14 | 2.75 / 2.50 | 3.0 / 3.08 / 3.02 | 2.12 / 1.56 | 3.44 |
| M6 | 1.0 | 24 | 10.5 / 10.07 | 3.30 / 3.00 | 4.0 / 4.095 / 4.02 | 2.26 / 2.08 | 4.58 |
| M8 | 1.25 | 28 | 14.0 / 13.57 | 4.40 / 4.10 | 5.0 / 5.14 / 5.02 | 3.05 / 2.60 | 5.72 |
| M10 | 1.5 | 32 | 17.5 / 17.07 | 5.50 / 5.20 | 6.0 / 6.14 / 6.02 | 3.75 / 3.12 | 6.86 |
| M12 | 1.75 | 36 | 21.0 / 20.48 | 6.60 / 6.24 | 8.0 / 8.175 / 8.025 | 4.61 / 4.16 | 9.15 |
| M16 | 2.0 | 44 | 28.0 / 27.48 | 8.80 / 8.44 | 10.0 / 10.175 / 10.025 | 6.19 / 5.20 | 11.43 |
Dimension symbols: d = nominal thread diameter; P = thread pitch; b = reference thread length; dk = head diameter; k = head height; s = internal hex socket size across flats; t = socket depth; e = minimum socket dimension across corners.
Button Head Design and Application
The button head provides a rounded external form and a relatively low head height. It can be used for machinery covers, equipment panels, furniture assemblies, molds, and other fastening positions where the selected design permits its head profile and bearing area.
A button head does not have the same head profile or bearing area as a standard cylindrical socket head. For a load-bearing connection, check the contact surface, tightening conditions, and required mechanical performance before selecting this head style.
Material and Property Classes
Material options are alloy steel and stainless steel.
| Material Group | Reference Property Classes Listed for ISO 7380-1:2022 |
|---|---|
| Steel | 8.8, 10.9, 12.9 |
| Stainless Steel | A2-70, A4-70, A2-80, A4-80 |
These are standard reference classes, not confirmation that every class is available for every size. The reference page notes that property class12.9fasteners can be susceptible to hydrogen embrittlement; applicable requirements should be checked against ISO 898-1 and ISO/TR 20491.
Typical marking codes shown in the reference include08.8, 010.9, 012.9, A2-070, A4-070, A2-080, and A4-080. Confirm the required class, marking, and mechanical properties during quotation.
Thread, Tolerance, and Finish Reference
Thread tolerance: 6g, subject to the applicable coating standard when an alternative pre-coating tolerance is specified.
Product grade: A.
Steel surface conditions: uncoated, electroplated in accordance with ISO 4042, or non-electrolytic zinc-flake coated in accordance with ISO 10683.
Stainless steel: clean and bright, with passivation in accordance with ISO 16048 where specified.
Other technical or surface-finish requirements should be agreed between buyer and supplier.
Information Needed for a Quote
Product standard: ISO 7380-1:2022
Required thread diameter and under-head length
Material and property class requirements
Required quantity for each specification
Head-clearance or assembly drawing requirements
Surface-finish requirements, if specified
Carton or bag packing preference
FAQ
1.What is the standard for this button head socket screw?
The dimensional reference is ISO 7380-1:2022 for hexagon socket button head screws.
2.What thread sizes are shown in the reference table?
The reference table covers M3, M4, M5, M6, M8, M10, M12, and M16 metric coarse threads.
3.What materials and property classes are listed?
The reference covers steel and stainless steel. Steel classes shown are 8.8, 10.9, and 12.9; stainless steel classes shown are A2-70, A4-70, A2-80, and A4-80. Confirm the required class and actual availability during quotation.
4.How is the screw length measured?
Screw length is measured from beneath the head to the screw tip. Provide this under-head length together with the thread diameter.
5.Can this button head screw replace a standard cylindrical socket head screw?
Not automatically. The button head has a different head profile and bearing area. Check the assembly design and mechanical requirements before substitution.
6.What packaging is listed?
Carton or bag packing. State your preference when sending the order requirements.
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Looking forISO 7380-1 Button Head Socket Screwsfor machinery, molds, furniture, equipment panels, or sheet-metal assembly?
Send your required diameter, length, material, property class, and quantity.Include a drawing or head-clearance requirement so the quotation can be checked against your installation needs.