Description
Overview:
These Metric Left Hand Threaded Nuts are M12 hex nuts in a self colour (plain steel) finish, designed for assemblies that require an anticlockwise tightening direction. Built from robust steel, they provide a secure and repeatable clamp in applications where standard right hand fasteners could loosen under rotation. The natural, uncoated surface is straightforward to integrate into new builds or repairs and is suitable where post-finishing may be applied. Common across construction plant, agricultural kit, and garden machinery, they are used on reverse-threaded shafts, pulleys, rollers, and other rotating parts. Sold individually, they allow you to order exactly what you need and pair with matching M12 left hand bolts or studs for reliable, serviceable joints.
Key Features:
- M12 metric left hand (LH) thread for reverse-threaded assemblies
- Tightens anticlockwise and loosens clockwise to resist rotational loosening
- Hex profile for use with standard spanners and sockets
- Self colour (plain steel) finish for straightforward integration and post-finishing
- Precision-machined thread for smooth run-on and consistent clamping
- Durable steel construction suitable for demanding site and workshop use
- Ideal for plant, agricultural, and garden machinery repairs
- Sold individually to match repair quantities and reduce waste
- Works with corresponding M12 LH bolts, studs, and threaded shafts
- Also available across common sizes typically ranging from M6 to M24
Typical Applications:
Used on rotating parts where right hand fasteners may unwind, such as conveyor rollers, pulleys, fans, augers, and blade carriers. Suitable for compactors, mixers, mowers, cultivators, and other site or garden machinery. Common in maintenance, repair, and overhaul tasks, fabrication of reverse-threaded assemblies, and safety-critical joints that experience vibration, shock loading, or continual rotation.
Also known as:
Left hand hex nut, LH nut, reverse thread nut, reverse-handed nut, left-thread nut, anticlockwise thread nut, left-hand fastening nut, counter-thread nut. These terms are used for nuts that tighten anticlockwise and are paired with matching left hand bolts or studs.
Product Specifications
| L&S Part No. | 903 0823 |
|---|---|
| OEM No. | 903 0823 50PK |
| Unit of Sale | Each |
| Size | M12 |
| Key Features | - M12 metric left hand thread for reverse-threaded assemblies - Tightens anticlockwise, loosens clockwise to resist loosening - Hex profile compatible with standard spanners and sockets - Plain steel finish allows for post-finishing applications - Suitable for plant, agricultural, and garden machinery repairs |
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