Key Features
- High-speed steel (HSS) construction for superior hardness and durability
- Corrosion-resistant black oxide finish for prolonged marine use
- Spiral flutes provide strong gripping power on broken or stripped fasteners
- Includes 5 commonly used extractor sizes covering M3–M16 bolts
- Universal fit for use with standard tap wrenches or drill chucks
- Sturdy storage case keeps the extractors organized and protected
Technical Specifications
| Specification | Details |
|---|---|
| Material | High-Speed Steel (HSS) |
| Finish | Black Oxide, Corrosion-Resistant |
| Number of Pieces | 5 |
| Sizes Included | #1, #2, #3, #4, #5 |
| Bolt Size Range | M3 – M16 (approx. 1/8" – 5/8") |
| Shank Type | Square Drive (for tap wrench) / Round (for drill) |
| Overall Length | 55–80 mm depending on size |
| Storage Case | Included (plastic or metal) |
| Application | Marine engine, hull fittings, pumps, electrical panels |
Frequently Asked Questions
What sizes of screw extractors are included in this set?
The set includes 5 extractors (sizes #1–#5) that cover metric bolt diameters from M3 to M16, making it suitable for most shipboard repair applications.
Can these extractors be used on stainless steel bolts?
Yes, the high-speed steel construction and spiral flutes are designed to grip hardened fasteners, including stainless steel and other alloys commonly used in marine environments. Use cutting fluid for best results.
How do I use a screw extractor to remove a broken bolt?
Drill a small pilot hole in the center of the broken bolt, then tap the extractor into the hole and turn it counterclockwise with a tap wrench or drill. The spiral flutes will bite into the bolt and back it out.
Are these extractors suitable for professional marine engineers?
Absolutely. This set is built to withstand heavy-duty use and is a standard tool in ship maintenance kits. The corrosion-resistant finish ensures longevity in damp, salty conditions.
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