M3 x 6 mm Button Head Socket Screw, 316 Stainless Steel - BCSA4M3X6
Available
The Metric Button Socket Head Screw, 316 Stainless Steel is available in 79 sizes (M3 to M12) and is a low, domed-head screw driven by a hex key. The smooth rounded head sits above the surface with little to catch on, so it is used where appearance or a snag-free finish matters.
The A4 (316) grade is stainless steel with added molybdenum, which helps it hold up where salt, pool chemicals or washdown chemicals are present. It is the more corrosion-resistant of the two common stainless grades, at a higher cost than 304. Metric sizes are written M followed by the nominal thread diameter in millimetres, so M10 is a 10 mm thread.
The range runs to 79 variants, covering sizes M3 to M12 and lengths 6 mm to 100 mm. Pack quantities depend on size: packs of 25 to 100.
Austenitic stainless steel is generally non-magnetic, although cold-worked parts can show weak magnetism. Stainless threads can gall (seize) when tightened under load or at speed. A smear of anti-seize on the thread and a steady tightening speed reduce the risk.
Where this product is used
- Small sizes for enclosures, instruments and light fittings
- Larger sizes for frames, plant and structural fixings
- Food, beverage and marine fittings
- Furniture, shopfitting and architectural fittings
- Equipment where clothing or cables could catch on a taller head
- Outdoor fittings exposed to salt air
Features
- Supplied in packs of 25 to 100
- Low domed head with a smooth, rounded profile
- Lengths from 6 mm to 100 mm
- A4 (316) stainless steel with molybdenum, for coastal and chloride-exposed settings
- Hex key drive
- Choice of 79 sizes, M3 to M12
Key specifications
| Specification | Detail |
|---|---|
| Product | Metric Button Socket Head Screw |
| Type | Low |
| Material | A4 (316) stainless steel |
| Number of variants | 79 |
| Sizes | M3 to M12 |
| Fitting tip | Use anti-seize on the thread to reduce galling |
| Thread system | Metric |
| Key features | Low domed head with a smooth, rounded profile; Hex key drive |
| Pack quantity | 25 to 100, by size |
| Drive | Hex socket |
| Typical environment | Coastal, marine, pool and food-processing use |
| Magnetic response | Generally non-magnetic (austenitic); cold-worked parts can show weak magnetism |
| Head type | Button (domed) |
| Length range | 6 mm to 100 mm |
Selecting the right option
The head is shallow, so the hex recess is smaller than on a cap screw of the same thread size. Use the correct key and avoid over-tightening. Use anti-seize on the thread. Where chlorides are not a concern, the A2 (304) version costs less: Button Head Socket Screw Black Stainless Steel.
Related products
Also available: Button Head Socket Screw M4 - Stainless Steel and Metric Button Socket Head Screw - 304 Stainless Steel. Matching products: Flat Round Washer DIN125A Stainless Steel.
Resources
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M3 / 6 mmmm socket
Model Number: BCSA4M3X6
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M3 / 8 mmmm socket
Model Number: BCSA4M3X8
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M3 / 10 mmmm socket
Model Number: BCSA4M3X10
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M3 / 12 mmmm socket
Model Number: BCSA4M3X12
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M3 / 16 mmmm socket
Model Number: BCSA4M3X16
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M3 / 20 mmmm socket
Model Number: BCSA4M3X20
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M3 / 25 mmmm socket
Model Number: BCSA4M3X25
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M3 / 30 mmmm socket
Model Number: BCSA4M3X30
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M3 / 40 mmmm socket
Model Number: BCSA4M3X40
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M3 / 50 mmmm socket
Model Number: BCSA4M3X50
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M4 / 6 mmmm socket
Model Number: BCSA4M4X6
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M4 / 8 mmmm socket
Model Number: BCSA4M4X8
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M4 / 10 mmmm socket
Model Number: BCSA4M4X10
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M4 / 12 mmmm socket
Model Number: BCSA4M4X12
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M4 / 16 mmmm socket
Model Number: BCSA4M4X16
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M4 / 20 mmmm socket
Model Number: BCSA4M4X20
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M4 / 25 mmmm socket
Model Number: BCSA4M4X25
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M4 / 30 mmmm socket
Model Number: BCSA4M4X30
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M4 / 40 mmmm socket
Model Number: BCSA4M4X40
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M4 / 50 mmmm socket
Model Number: BCSA4M4X50
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M5 / 8 mmmm socket
Model Number: BCSA4M5X8
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M5 / 10 mmmm socket
Model Number: BCSA4M5X10
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M5 / 12 mmmm socket
Model Number: BCSA4M5X12
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M5 / 16 mmmm socket
Model Number: BCSA4M5X16
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M5 / 20 mmmm socket
Model Number: BCSA4M5X20
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M5 / 25 mmmm socket
Model Number: BCSA4M5X25
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M5 / 30 mmmm socket
Model Number: BCSA4M5X30
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M5 / 35 mmmm socket
Model Number: BCSA4M5X35
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M5 / 40 mmmm socket
Model Number: BCSA4M5X40
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M5 / 45 mmmm socket
Model Number: BCSA4M5X45
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M5 / 50 mmmm socket
Model Number: BCSA4M5X50
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M5 / 60 mmmm socket
Model Number: BCSA4M5X60
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M6 / 10 mmmm socket
Model Number: BCSA4M6X10
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M6 / 12 mmmm socket
Model Number: BCSA4M6X12
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M6 / 16 mmmm socket
Model Number: BCSA4M6X16
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M6 / 20 mmmm socket
Model Number: BCSA4M6X20
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M6 / 25 mmmm socket
Model Number: BCSA4M6X25
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M6 / 30 mmmm socket
Model Number: BCSA4M6X30
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M6 / 35 mmmm socket
Model Number: BCSA4M6X35
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M6 / 40 mmmm socket
Model Number: BCSA4M6X40
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M6 / 45 mmmm socket
Model Number: BCSA4M6X45
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M6 / 50 mmmm socket
Model Number: BCSA4M6X50
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M6 / 60 mmmm socket
Model Number: BCSA4M6X60
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M6 / 70 mmmm socket
Model Number: BCSA4M6X70
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M6 / 80 mmmm socket
Model Number: BCSA4M6X80
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M6 / 100 mmmm socket
Model Number: BCSA4M6X100
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M8 / 16 mmmm socket
Model Number: BCSA4M8X16
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M8 / 20 mmmm socket
Model Number: BCSA4M8X20
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M8 / 25 mmmm socket
Model Number: BCSA4M8X25
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M8 / 30 mmmm socket
Model Number: BCSA4M8X30
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M8 / 35 mmmm socket
Model Number: BCSA4M8X35
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M8 / 40 mmmm socket
Model Number: BCSA4M8X40
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M8 / 45 mmmm socket
Model Number: BCSA4M8X45
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M8 / 50 mmmm socket
Model Number: BCSA4M8X50
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M8 / 60 mmmm socket
Model Number: BCSA4M8X60
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M8 / 70 mmmm socket
Model Number: BCSA4M8X70
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M8 / 80 mmmm socket
Model Number: BCSA4M8X80
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M8 / 100 mmmm socket
Model Number: BCSA4M8X100
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M10 / 20 mmmm socket
Model Number: BCSA4M10X20
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M10 / 25 mmmm socket
Model Number: BCSA4M10X25
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M10 / 30 mmmm socket
Model Number: BCSA4M10.X30
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M10 / 35 mmmm socket
Model Number: BCSA4M10X35
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M10 / 40 mmmm socket
Model Number: BCSA4M10X40
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M10 / 45 mmmm socket
Model Number: BCSA4M10X45
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M10 / 50 mmmm socket
Model Number: BCSA4M10X50
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M10 / 60 mmmm socket
Model Number: BCSA4M10X60
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M10 / 70 mmmm socket
Model Number: BCSA4M10X70
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M10 / 80 mmmm socket
Model Number: BCSA4M10X80
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M10 / 100 mmmm socket
Model Number: BCSA4M10X100
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M12 / 20 mmmm socket
Model Number: BCSA4M12X20
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M12 / 25 mmmm socket
Model Number: BCSA4M12X25
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M12 / 30 mmmm socket
Model Number: BCSA4M12X30
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M12 / 35 mmmm socket
Model Number: BCSA4M12X35
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M12 / 40 mmmm socket
Model Number: BCSA4M12X40
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M12 / 50 mmmm socket
Model Number: BCSA4M12X50
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M12 / 60 mmmm socket
Model Number: BCSA4M12X60
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M12 / 70 mmmm socket
Model Number: BCSA4M12X70
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M12 / 80 mmmm socket
Model Number: BCSA4M12X80
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M12 / 100 mmmm socket
Model Number: BCSA4M12X100
