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Thread number | Specification | Diameter (m/m) | Breaking strength (kg) | Unit length (m/kg) | Usage |
80# | 120D/3 | 0.23 | ≥2.3kg | 20900 | Thin fabrics and leather materials: wallets, raincoats, leather jackets, etc. |
150D/2 | 0.22 | ≥2.0kg | 27500 | ||
60# | 150D/3 | 0.25 | ≥2.9kg | 18000 | |
40# | 210D/2 | 0.25 | ≥2.7kg | 18500 | Genuine leather and leather products: leather shoes, leather bags, handbags, leather gloves, leather suitcases, leather clothes, etc. Thicker fabrics: travel bags, tents, fabric sofas, bedding, etc., mattress fabrics. |
250D/2 | 0.28 | ≥3.3kg | 15500 | ||
30# | 210D/3 | 0.32 | ≥4.1kg | 12300 | |
250D/3 | 0.33 | ≥4.9kg | 10500 | ||
20# | 210D/4 | 0.36 | ≥5.5kg | 9000 | |
300D/3 | 0.40 | ≥6.5kg | 7750 | ||
10# | 420D/3 | 0.45 | ≥8.2kg | 6400 | Thick leather products: sofas, car cushions, sports shoes, leather bags. Thick cloth products: canvas, tents, backpacks, etc. Hand-sewn products, kites, bead curtains |
500D/3 | 0.48 | ≥9.8kg | 5500 | ||
5# | 630D/3 | 0.50 | ≥12.3kg | 4400 | |
0# | 840D/3 | 0.60 | ≥16.4kg | 3200 | Mostly used for large kites, hand-sewn products, packaging, mark thread |











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