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hamma® SF3121P Jaw-Swage Rigging Screw is a turnbuckle (rigging screw) for boats and yachts, available in 22 sizes.
Turnbuckles are used to set and adjust tension in standing rigging such as shrouds, forestays, backstays and lifelines. Sizes run from 2.5mm × M5 to 16mm × M24; choose the size that matches your wire and thread in the table below. Genuine Arcus hamma® hardware, supplied by ASW Marine Parts for boat owners across Australia.
Which size do I need? Match your wire diameter and thread size to the size table. If you are replacing an existing fitting, measure the wire and thread, or quote the Arcus code. Dimension letters (A, H, L) follow the Arcus catalogue drawing.
What load is it rated for? Arcus lists a breaking load (B.L.) of 600 to 18,500 kgs across these sizes. Breaking load is not a safe working load; size your rigging with a suitable safety factor.
Do prices include GST? Yes. All prices are in Australian dollars and include GST.
| Code | Wire × thread | Min length (mm) | Max length (mm) | A (mm) | H (mm) | B.L. (kgs) | Price inc GST |
|---|---|---|---|---|---|---|---|
| HM-6312-1017 | 2.5mm × M5 | 150 | 193 | 6 | 11.5 | 600 | $8.44 |
| HM-6312-1122 | 3mm × M5 | 142 | 193 | 7 | 11.5 | 600 | $8.82 |
| HM-6312-1016 | 3mm × M6 | 170 | 207 | 8 | 12.5 | 1,000 | $11.12 |
| HM-6312-1007 | 1/8" × M5 | 156 | 193 | 7 | 11.5 | 600 | $8.98 |
| HM-6312-1008 | 1/8" × M6 | 170 | 207 | 8 | 12.5 | 1,000 | $12.10 |
| HM-6312-1050 | 4mm × M6 | 185 | 207 | 8 | 12.5 | 1,000 | $12.29 |
| HM-6312-1018 | 4mm × M8 | 205 | 260 | 11 | 18.5 | 1,400 | $17.91 |
| HM-6312-1015 | 3/16" × M8 | 205 | 260 | 11 | 15.5 | 1,400 | $24.13 |
| HM-6312-1027 | 3/16" × M10 | 240 | 340 | 12 | 17.5 | 2,200 | $26.97 |
| HM-6312-1064 | 5mm × M8 | 210 | 260 | 11 | 15.5 | 1,400 | $19.31 |
| HM-6312-1009 | 5mm × M10 | 240 | 340 | 13 | 17.5 | 2,200 | $26.23 |
| HM-6312-1010 | 6mm × M12 | 295 | 380 | 15 | 28 | 4,000 | $40.16 |
| HM-6312-1011 | 7mm × M14 | 29 | 5,400 | $51.07 | |||
| HM-6312-1006 | 1/4" × M10 | 247 | 340 | 15 | 28 | 2,200 | $30.91 |
| HM-6312-1040 | 1/4" × M12 | 295 | 380 | 14 | 27 | 4,000 | $44.14 |
| HM-6312-1098 | 8mm × M12 | 303 | 380 | 13 | 27 | 4,500 | $46.14 |
| HM-6312-1073 | 8mm × M14 | 328 | 410 | 15 | 28 | 6,000 | $73.57 |
| HM-6312-1070 | 8mm × M16 | 370 | 495 | 17 | 25 | 6,500 | $82.17 |
| HM-6312-1074 | 10mm × M16 | 380 | 495 | 17 | 25 | 8,200 | $111.33 |
| HM-6312-1071 | 10mm × M20 | 405 | 560 | 20 | 39 | 8,500 | $117.81 |
| HM-6312-1455 | 12mm × M20 | 414 | 560 | 20 | 39 | 12,500 | $133.24 |
| HM-6312-1461 | 16mm × M24 | 610 | 760 | 30 | 55 | 18,500 | $299.02 |
hamma® SF3121P Jaw-Swage Rigging Screw is a turnbuckle (rigging screw) for boats and yachts, available in 22 sizes.
Turnbuckles are used to set and adjust tension in standing rigging such as shrouds, forestays, backstays and lifelines. Sizes run from 2.5mm × M5 to 16mm × M24; choose the size that matches your wire and thread in the table below. Genuine Arcus hamma® hardware, supplied by ASW Marine Parts for boat owners across Australia.
Which size do I need? Match your wire diameter and thread size to the size table. If you are replacing an existing fitting, measure the wire and thread, or quote the Arcus code. Dimension letters (A, H, L) follow the Arcus catalogue drawing.
What load is it rated for? Arcus lists a breaking load (B.L.) of 600 to 18,500 kgs across these sizes. Breaking load is not a safe working load; size your rigging with a suitable safety factor.
Do prices include GST? Yes. All prices are in Australian dollars and include GST.
| Code | Wire × thread | Min length (mm) | Max length (mm) | A (mm) | H (mm) | B.L. (kgs) | Price inc GST |
|---|---|---|---|---|---|---|---|
| HM-6312-1017 | 2.5mm × M5 | 150 | 193 | 6 | 11.5 | 600 | $8.44 |
| HM-6312-1122 | 3mm × M5 | 142 | 193 | 7 | 11.5 | 600 | $8.82 |
| HM-6312-1016 | 3mm × M6 | 170 | 207 | 8 | 12.5 | 1,000 | $11.12 |
| HM-6312-1007 | 1/8" × M5 | 156 | 193 | 7 | 11.5 | 600 | $8.98 |
| HM-6312-1008 | 1/8" × M6 | 170 | 207 | 8 | 12.5 | 1,000 | $12.10 |
| HM-6312-1050 | 4mm × M6 | 185 | 207 | 8 | 12.5 | 1,000 | $12.29 |
| HM-6312-1018 | 4mm × M8 | 205 | 260 | 11 | 18.5 | 1,400 | $17.91 |
| HM-6312-1015 | 3/16" × M8 | 205 | 260 | 11 | 15.5 | 1,400 | $24.13 |
| HM-6312-1027 | 3/16" × M10 | 240 | 340 | 12 | 17.5 | 2,200 | $26.97 |
| HM-6312-1064 | 5mm × M8 | 210 | 260 | 11 | 15.5 | 1,400 | $19.31 |
| HM-6312-1009 | 5mm × M10 | 240 | 340 | 13 | 17.5 | 2,200 | $26.23 |
| HM-6312-1010 | 6mm × M12 | 295 | 380 | 15 | 28 | 4,000 | $40.16 |
| HM-6312-1011 | 7mm × M14 | 29 | 5,400 | $51.07 | |||
| HM-6312-1006 | 1/4" × M10 | 247 | 340 | 15 | 28 | 2,200 | $30.91 |
| HM-6312-1040 | 1/4" × M12 | 295 | 380 | 14 | 27 | 4,000 | $44.14 |
| HM-6312-1098 | 8mm × M12 | 303 | 380 | 13 | 27 | 4,500 | $46.14 |
| HM-6312-1073 | 8mm × M14 | 328 | 410 | 15 | 28 | 6,000 | $73.57 |
| HM-6312-1070 | 8mm × M16 | 370 | 495 | 17 | 25 | 6,500 | $82.17 |
| HM-6312-1074 | 10mm × M16 | 380 | 495 | 17 | 25 | 8,200 | $111.33 |
| HM-6312-1071 | 10mm × M20 | 405 | 560 | 20 | 39 | 8,500 | $117.81 |
| HM-6312-1455 | 12mm × M20 | 414 | 560 | 20 | 39 | 12,500 | $133.24 |
| HM-6312-1461 | 16mm × M24 | 610 | 760 | 30 | 55 | 18,500 | $299.02 |