Left-Hand Thread Trapezium Threaded Rods (DIN 103)

Left-Hand Thread Trapezium Threaded Rods, to DIN 103 or ISO 2901/2903, host a 30° thread angle and a trapezoidal thread form – the same shape as an isosceles trapezium.

Often referred to as Trapezoidal Threaded Rods or Trapezoidal Lead Screws, they feature a left-hand thread or reverse thread which can prevent gradual loosening of components in certain applications.

This left-hand thread is also used to drive Round Left-Hand Trapezium Threaded Nuts and Hexagon Left-Hand Trapezium Threaded Nuts in the opposite direction, or to create incompatibility with right-hand threaded components – typically for safety purposes.

They can support large loads due to their high strength and are often utilised as a power screw or lead screw in a wide range of industrial machinery.

Left-Hand Thread Trapezium Threaded Rods to DIN 103 are available at Fastenright in outer diameters from 10mm to 100mm, with a pitch per turn ranging from 2mm to 12mm (TR10x2 to TR100x12).

Manufactured from C15 Carbon Steel, C45 Carbon Steel, A2 Stainless Steel (1.4301) and A4 Stainless Steel (1.4401) as standard. We also supply a huge range of Threaded Rod in a variety of sizes and materials.

Non-standard sizes, materials and finishes are available to order as specials, including small volume manufacture, modifications and bespoke parts made to drawings. Minimum order quantities apply.

Note: TR10x2 indicates an outer diameter of 10mm with a pitch of 2mm. Parts with * are available to order.

TR10x2 L	*
TR10x3 L	*
TR12x2 L	*	*	*
TR12x3 L	**	**	**
TR14x3 L
TR14x4 L	**	**	**
TR16x4 L	*	*	*
TR18x4 L
TR20x4 L	**	**	**
TR22x5 L	***	***	***
TR24x5 L	**	**	**
TR26x5 L	***	***	***
TR28x5 L	*	*	*
TR30x6 L	**	**	**	*
TR32x6 L	***	***	***	*
TR36x6 L	*	*	**	*
TR40x7 L	**	**	**	*
TR44x7 L	**	**	**	*
TR48x8 L				*
TR50x8 L	**	**	**	*
TR52x8 L				*
TR55x9 L				*
TR60x9 L	*	*	*	*
TR70x10 L				*
TR80x10 L				*
TR90x12 L	*	*	*	*
TR100x12 L	*	*	*	*

= Steel C15 // = Steel C45 // = A2 Stainless Steel // = A4 Stainless Steel Size not listed? Please make an enquiry – we may be able to provide it.