Speedway Bonded Nylon 66 Thread Tex 45 (Size 46) — 8.8 oz Spool

Speedway Tex 45 (size 46) is a high-tenacity bonded nylon 66 sewing thread supplied on an 8.8 oz (250 g) spool, available in 6 colors. Bonding fuses the three plies together, so the thread does not fray or break at industrial sewing speeds and the seam keeps the abrasion resistance that upholstery, leather and canvas work demands. Ships from Miami, FL.

Technical Specifications

8.8 oz, not 8

Bonded nylon in this class is normally sold on 4 oz or 8 oz spools. This one holds 8.8 oz (250 g) — roughly 10% more thread than the common 8 oz spool, on the same footprint and the same spool change. Worth checking when you compare prices: the cheaper spool is often the smaller one.

What is it used for?

• Light upholstery and fine leather work
• Leather goods: linings, pockets and interior seams
• Light footwear and small leather articles
• Anywhere Tex 70 is simply too heavy

What needle size should I use?

Use a Nm 90–100 (Singer 14–16) needle with this thread.

That is the size. The system — DBx1, 135x17, 134-35 — depends on your machine, not on the thread. How to identify yours · Industrial machine needles

Careful with “Nm”: for thread it means 1000/Tex (Tex 45 = Nm 22.2), but for needles it means the blade diameter in hundredths of a millimetre (Nm 110 = 1.10 mm). They are not the same number. Conversion formulas from Coats; government sizes from the A-A-59826 specification published by American & Efird.

Not sure between two sizes?

Tex 45 or Tex 70? Step up to Tex 70 if the seam carries load or the leather is thicker than about 2 mm. Stay at Tex 45 for linings, small leather goods and anywhere a chunky stitch would look coarse.

The rest of this line

• Tex 70 (Size 69)
• Tex 92 (Size 92)
• Tex 135 (Size 138)
• Tex 210 (Size 207)

Frequently Asked Questions

What needle size should I use with Tex 45?

Nm 90–100 (Singer 14–16). If the stitch looks starved or the thread frays, go one size up before changing anything else.

What is the difference between Tex 45 and size 46?

None — they are the same thread described in two numbering systems. Tex is the weight in grams of 1,000 metres; the commercial size comes from the older US system.

Should I use Tex 45 or the next size?

Tex 45 or Tex 70? Step up to Tex 70 if the seam carries load or the leather is thicker than about 2 mm. Stay at Tex 45 for linings, small leather goods and anywhere a chunky stitch would look coarse.

How much thread is on the spool?

Each spool holds 250 g of thread (8.8 oz). We do not publish a yardage figure because the bonding resin adds weight that the nominal Tex does not account for — quoting a converted number would be a guess, and we would rather not guess.

Will this work on a domestic machine?

Yes. Tex 45 is a normal garment weight — any domestic machine handles it with the needle size above. It is also the weight most overlock and coverstitch machines are set up for.