Classic Waxed Thread 12/0

Semperfli Classic Waxed Thread 12/0

Semperfli Classic Waxed Thread 12/0 is a fine, strong polyester fly tying thread designed for tyers who want excellent control with minimal thread build-up. At 70 denier, it is ideal for tying smaller dry flies, midges, emergers, Euro nymphs and other patterns where a neat, slim profile is important.

Manufactured from lightly twisted polyester and lightly pre-waxed, Classic Waxed Thread 12/0 lays flatter on the hook than many conventional tying threads. This helps reduce unnecessary bulk while providing excellent grip when securing fly tying materials.

The thread can also be split easily, making it particularly useful for split-thread dubbing techniques and creating compact dubbing loops.

Why Choose Semperfli Classic Waxed Thread 12/0?

• Fine 12/0 fly tying thread with a 70 denier profile
• Strong breaking strain of approximately 489g / 17.25oz
• 220 metres / 240 yards of thread per spool
• Lightly waxed for improved grip and material control
• Lays flat to help produce slim bodies and neat fly heads
• Easy to split for dubbing and split-thread techniques
• Excellent strength without excessive bulk
• Suitable for dry flies, midges, emergers, nymphs and Euro nymph patterns
• Particularly useful for hook sizes approximately 10–20
• Available in a wide selection of traditional and fluorescent colours

Fine Thread – Less Bulk, More Control

The fine 12/0 diameter allows you to make multiple securing wraps without quickly building excessive bulk on the hook. This is especially useful when tying small flies, delicate dry flies and precise nymph patterns where maintaining the correct proportions is essential.

Despite its fine diameter, Classic Waxed Thread 12/0 has an impressive breaking strain, allowing you to apply good tying tension when securing materials.

Flat-Laying Polyester Construction

Semperfli Classic Waxed Thread is designed to flatten as it is wrapped around the hook. A flatter thread creates smoother bodies and smaller heads while spreading tying pressure over a wider area.

The lightly waxed finish also improves grip, helping materials stay securely in position while tying.

Ideal for Dry Flies and Euro Nymphs

12/0 is an excellent general-purpose fine fly tying thread for:

• Dry flies
• Euro nymphs
• Midges
• Emergers
• Small nymphs
• Slim-bodied patterns
• Fine heads and finishing work
• Split-thread dubbing techniques

If you need a slightly heavier thread for more general-purpose fly tying, see our Semperfli Classic Waxed Thread 8/0.

For very small flies and ultra-fine tying where minimum bulk is essential, see our Semperfli Classic Waxed Thread 18/0.

You can also browse our complete range of fly tying threads including waxed polyester, GSP, silk and other specialist tying threads.

Specifications

Brand: Semperfli
Product: Classic Waxed Thread
Thread Size: 12/0
Denier: 70D
Material: Polyester
Spool Length: Approx. 220m / 240 yards
Breaking Strain: Approx. 489g / 17.25oz
Recommended Hook Sizes: Approximately 10–20
Finish: Lightly waxed
Packaging: Spool

Semperfli Classic Waxed Thread 12/0 is an excellent choice for fly tyers looking for a fine, reliable and versatile fly tying thread that combines strength, low bulk, good material grip and excellent control.