DURAN® Standard Cone, finished
- Complies with DIN 12249 Form B
- Manufactured from borosilicate glass 3.3
- Ground (finer grinding quality, less roughness depth)
- The finer surface reduces the risk of jamming the cuts.
- Minimized grease requirement
- Tight closure due to standard ground joint
- Glass articles for further processing
Products

| Catalog No | Cone (NS) | Wall Thickness s (mm) | Diameter d (mm) | Length l (mm) | Remarks | Quantity | |
|---|---|---|---|---|---|---|---|
| 286150403 | 5/13 | 0.8 | 4 | 120 | - | 10 | Find a distributor |
| 286151005 | 7/16 | 1.5 | 6 | 120 | - | 10 | Find a distributor |
| 286151802 | 10/19 | 1.5 | 8 | 120 | - | 50 | Find a distributor |
| 286152404 | 12/21 | 1.5 | 11 | 120 | - | 50 | Find a distributor |
| 286153203 | 14/23 | 1.5 | 13 | 120 | - | 50 | Find a distributor |
| 286155007 | 19/26 | 1.8 | 17 | 146 | - | 1 | Find a distributor |
| 286156209 | 24/29 | 1.8 | 22 | 146 | - | 1 | Find a distributor |
| 286157008 | 29/32 | 2 | 26 | 146 | - | 50 | Find a distributor |
| 286159609 | 34/35 | 2 | 30 | 146 | - | 50 | Find a distributor |
| 286160207 | 45/40 | 2.3 | 40 | 146 | - | 10 | Find a distributor |
| 286160404 | 100/60 | 3.5 | 90 | 146 | - | 1 | Find a distributor |
| 286160601 | 40/38 | 2 | 36 | 210 | Non-DIN size | 10 | Find a distributor |
| 286161203 | 50/42 | 2.3 | 46 | 150 | Non-DIN size | 10 | Find a distributor |
| 286161409 | 55/44 | 2.5 | 50 | 140 | Non-DIN size | 10 | Find a distributor |
| 286161606 | 60/46 | 2.5 | 56 | 160 | Non-DIN size | 10 | Find a distributor |
| 286161803 | 71/51 | 3.2 | 65 | 170 | Non-DIN size | 10 | Find a distributor |
| 286162002 | 85/55 | 3.5 | 80 | 170 | Non-DIN size | 1 | Find a distributor |
Specifications
Product specifications are found on the product detail pages. Click on the product catalog number in the table above to view the individual product specifications.
Product Overview
The conical ground joint is the most common joint in glass apparatus engineering. Ground DURAN® cores comply with DIN 12249 Form B in their design and meet higher requirements for surface roughness. This reduces the need for grinding grease and the risk of jamming. Ground joints with ground grease or PTFE sleeves should always be used. KECK™ Conical ground joint clamps are the perfect supplement for securing the conical ground joint.
Products
Products

| Catalog No | Cone (NS) | Wall Thickness s (mm) | Diameter d (mm) | Length l (mm) | Remarks | Quantity | |
|---|---|---|---|---|---|---|---|
| 286150403 | 5/13 | 0.8 | 4 | 120 | - | 10 | Find a distributor |
| 286151005 | 7/16 | 1.5 | 6 | 120 | - | 10 | Find a distributor |
| 286151802 | 10/19 | 1.5 | 8 | 120 | - | 50 | Find a distributor |
| 286152404 | 12/21 | 1.5 | 11 | 120 | - | 50 | Find a distributor |
| 286153203 | 14/23 | 1.5 | 13 | 120 | - | 50 | Find a distributor |
| 286155007 | 19/26 | 1.8 | 17 | 146 | - | 1 | Find a distributor |
| 286156209 | 24/29 | 1.8 | 22 | 146 | - | 1 | Find a distributor |
| 286157008 | 29/32 | 2 | 26 | 146 | - | 50 | Find a distributor |
| 286159609 | 34/35 | 2 | 30 | 146 | - | 50 | Find a distributor |
| 286160207 | 45/40 | 2.3 | 40 | 146 | - | 10 | Find a distributor |
| 286160404 | 100/60 | 3.5 | 90 | 146 | - | 1 | Find a distributor |
| 286160601 | 40/38 | 2 | 36 | 210 | Non-DIN size | 10 | Find a distributor |
| 286161203 | 50/42 | 2.3 | 46 | 150 | Non-DIN size | 10 | Find a distributor |
| 286161409 | 55/44 | 2.5 | 50 | 140 | Non-DIN size | 10 | Find a distributor |
| 286161606 | 60/46 | 2.5 | 56 | 160 | Non-DIN size | 10 | Find a distributor |
| 286161803 | 71/51 | 3.2 | 65 | 170 | Non-DIN size | 10 | Find a distributor |
| 286162002 | 85/55 | 3.5 | 80 | 170 | Non-DIN size | 1 | Find a distributor |
Specification
Specifications
Product specifications are found on the product detail pages. Click on the product catalog number in the table above to view the individual product specifications.
Product Overview
Product Overview
The conical ground joint is the most common joint in glass apparatus engineering. Ground DURAN® cores comply with DIN 12249 Form B in their design and meet higher requirements for surface roughness. This reduces the need for grinding grease and the risk of jamming. Ground joints with ground grease or PTFE sleeves should always be used. KECK™ Conical ground joint clamps are the perfect supplement for securing the conical ground joint.
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