SS Dome Nut
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WhatsApp us Get a Quote +91 90333 11425 Download catalogue (PDF)JMIKS Fasteners supplies dome nuts (cap nuts or acorn nuts) in SS 304, SS 316 and SS 202, and in mild steel and high tensile grades, from M3 to M36 and ¼” to 1-1/4″ BSW. The closed, rounded top covers the bolt end for a neat and safe finish.
Standard : DIN / IS / AISI
Size : Metric : M3 To M36 / BSW : ¼” to 1-1/4”
Material Grade: SS304 | SS316 | SS202 | 4.6 |8.8 | 10.9 | 12.9
Finish : Zinc Plated , HDG , Self finish
A dome nut has a hexagon body with a closed dome on top. It hides the cut end of the bolt thread, protects it from damage and dirt, and avoids sharp edges. The common standard is DIN 1587.
Key dimensions of DIN 1587 dome nuts (high type cap nuts) in common sizes, in mm. The total height includes the dome.
| Size | Thread pitch | Spanner size | Total height |
|---|---|---|---|
| M6 | 1.0 | 10 | 12 |
| M8 | 1.25 | 13 | 15 |
| M10 | 1.5 | 17 | 18 |
| M12 | 1.75 | 19 | 22 |
| M16 | 2.0 | 24 | 28 |
| M20 | 2.5 | 30 | 34 |
| M24 | 3.0 | 36 | 42 |
Typical dimensions as per DIN 1587; refer to the standard for tolerances.
Dome nuts are usually on show, so SS 304 or SS 316 keeps them bright and rust-free, both indoors and outdoors.
The bolt end must stay below the dome. If the bolt is too long, it hits the inside of the dome before the nut is tight, and the joint stays loose. Choose a length that ends within the threaded part of the nut.
A plain washer spreads the load and protects painted or soft surfaces. With a stainless steel dome nut, choose an SS plain washer of the same grade, for example SS 304 with SS 304.
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