Selden Rigging Screw Fork Dimensions — Selection Guide
SELECTION GUIDE
Match a Selden rigging screw to its wire and chainplate: fork pin, slot, depth and width, with the recommended chainplate thickness and hole diameter.
DocumentSelden Rigging Screw Fork Dimensions Selection Guide
FormatPDF · 1 page · 0.3 MB
LanguageEnglish
Dimensions, Rigging Screw Fork
| Rigging screw | Ult. load (N) | Corresp. wire Ø | Wire ult. load (N) | Pin dia. D (mm) | Slot G (mm) | Fork depth L (mm) | Toggle depth L (mm) | Fork width H (mm) | Chainplate thickness B (mm) | Chainplate hole Ø E (mm) |
|---|---|---|---|---|---|---|---|---|---|---|
| 1/4" | 15000 | 3 mm / 4 mm | 8000 / 14000 | 6.5 | 7 | 12.5 | 15 | 14 | 5 | 7 |
| 5/16" | 23000 | 4 mm / 5 mm | 14000 / 22000 | 8.0 | 8 | 15 | 19 | 16 | 6.5 | 8.5 |
| 3/8" | 34000 | 5 mm / 6 mm | 22000 / 31000 | 9.5 | 10 | 18 | 22 | 20 | 8 | 10.5 |
| 7/16" | 47000 | 6 mm / 7 mm | 31000 / 43000 | 11.0 | 12 | 18 | 23.5 | 25 | 10 | 12 |
| 1/2" | 68000 | 7 mm / 8 mm | 43000 / 56000 | 13.0 | 14 | 24 | 30 | 28 | 11.5 | 14 |
| 5/8" | 95000 | 8 mm / 10 mm | 56000 / 88000 | 15.8 | 16 | 31 | 39.5 | 34 | 13 | 17 |
| 3/4" | 125000 | 10 mm / 12 mm | 88000 / 126000 | 15.8 / 19 | 20 | 32 | 40.5 | 39 | 16 | 17.5 / 20.5 |
| 7/8" | 180000 | 12 mm / 14 mm | 126000 / 171000 | 19 / 22 | 22 | 45 | 55 | 50 | 17 | 20.5 / 23.5 |
| M24 | 250000 | 14 mm / 16 mm | 171000 / 210000 | 22 | 25 | 50 | 60 | 20 | 23.5 |
Chainplate thickness and hole diameter are recommended approximate values. Leave ~2-3 mm between fork and chainplate (see drawing in the PDF).
General Comments
- Chainplates should be aligned with the direction of shroud tension, or toggles must be fitted.
- Chainplate load capacity must be calculated/checked by the yacht designer/builder.
- To achieve 5° articulation, follow the recommendations in the two right-hand columns.
- There is an ISO recommendation, TR-4558, for main dimension compatibility.
Need a part that isn't listed? Ask us to source it and quote the part number from the PDF.
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