Hipa T35 trimmer head for Husqvarna straight-shaft trimmers M10×1.25 LH — preloaded .095-inch line, tap-advance feed

Hipa T35 is a tap-advance replacement trimmer head pre-loaded with .095" line, designed to fit many Husqvarna straight-shaft trimmers for fast, reliable bump-feed cutting.

This Hipa T35 trimmer head is crafted to restore or upgrade the bump-feed performance of compatible Husqvarna straight-shaft string trimmers. It replaces OEM part numbers like 578446301 and 537388101 and works with many models across the 100–500 series. The head ships pre-wrapped with high-visibility orange .095" line and supports a range of line diameters for flexible use on lawns, tall grass, and light brush.

Which Husqvarna models will this Hipa T35 head fit?

The Hipa T35 is engineered to fit a broad set of Husqvarna straight-shaft trimmers and many 223–535 series machines. Confirm your machine’s bolt thread size matches M10×1.25 LHF to ensure compatibility.

• Compatible with Husqvarna 525L, 522L, 525LS, 535LS and similar models
• Also fits many 223L–327 and 535 series straight-shaft trimmers
• Replacement for OEM refs 578446301 and 537388101
• Product is the M10×1.25 left-hand thread mounting nut version

How does the tap-advance (bump feed) work and why choose it?

The tap-advance mechanism releases more line when you lightly tap the head on the ground while the trimmer is running, keeping operation continuous without manual stops. This system is simple, proven, and reduces downtime compared with manual-feed heads.

• Tap once to feed additional line—fast and tool-free
• Reduces interruptions so you finish jobs more quickly
• Compatible with .065"–.105" trimmer lines for versatility
• Pre-loaded with 6 meters (19.5 feet) of .095" orange line out of the box

What are the physical specs and installation points I should know?

The T35 head’s compact dimensions and standard bolt size make it easy to swap onto supported trimmers. Check the head height and overall width against your clearance requirements before installing.

• Bolt size: M10×1.25 LH (left-hand thread)
• Pre-loaded with 7 feet (.095" line) — overall supplied length 6 meters
• Overall width: 122.3 mm (4-13/16"); overall height: 68 mm (2-11/16")
• Accepts line diameters of .095" or .105" for optimal cut power

How does cutting performance and durability measure up?

The T35 combines a reliable bump-feed mechanism with a square-cut high-visibility line to deliver aggressive cutting on thick grass and light brush. The head is built to withstand typical homeowner and pro-use conditions when matched to appropriate line and engine power.

• Square trimmer line provides efficient, aggressive cutting
• Tap-feed keeps line length consistent for clean results
• Pre-wrapped line reduces initial setup time
• Robust construction intended for regular trimming tasks

Who is this for: The Hipa T35 trimmer head is ideal for homeowners, landscapers, and maintenance pros who use Husqvarna straight-shaft trimmers and want a dependable, easy-feed replacement. Choose this head if you need a straightforward bump-feed solution pre-loaded with line, a specific M10×1.25 left-hand threaded mount, and compatibility across many Husqvarna 100–500 series models. Verify your trimmer’s thread size and model fit before purchase to ensure a fast, correct installation.