UTC Ultra Thread 140
UTC Ultra Thread 140 by Wapsi is a flat, general-purpose fly-tying thread. Its flat construction is useful for creating an even thread base and managing the profile of a body. The product is recommended for size 6-14 flies and is also specifically suited to split-thread dubbing, where dubbing fibres are placed into a divided section of thread and then twisted into position.
Construction and use
Use it for securing materials, forming bodies and finishing heads across a range of trout-fly patterns. A flat thread is helpful when the tier needs to cover part of the shank evenly without adding unnecessary bulk through a round build-up. Pay attention to twist while tying: if the thread rotates away from the desired lay, let the bobbin settle before making the next wraps. This keeps the flat profile working as intended.
- Type: Flat fly-tying thread.
- Designation: UTC Ultra Thread 140; the model number does not replace a stated diameter or strength value.
- Recommended flies: Size 6-14 flies and general trout-fly tying.
- Technique: Suitable for split-thread dubbing.



