Rolex
Submariner 5517— lug 20mm

The Rolex Submariner 5517 has a lug width of 20mm, measured internally between the case lugs at the strap attachment point. This is the standard dimension across the entire Submariner family and allows the fitment of any straight-ended 20mm strap.

The choice depends on intended use and personal style. For those wishing to honour the watch's military origins, a NATO strap in nylon or cordura in olive green or black is the most historically appropriate option. For everyday elegant wear, a vegetable-tanned calf leather or hornback alligator strap in black offers refinement and durability. Shell cordovan develops a rich patina over time that complements tropical dials found on certain examples.

Replacing the strap on the 5517 requires a 1.8mm springbar tool. Compress the springbar on both sides of the lug and gently lever the strap free. Care must be taken not to scratch the steel lugs, which on vintage examples often carry a natural patina. Given the historical significance of this reference, it is advisable to entrust the operation to an experienced watchmaker.

Yes. Any strap with a 20mm lug width and straight ends is compatible with the Rolex Submariner 5517. Casati Milano artisan straps are crafted to fit Rolex lugs precisely, with stainless steel springbars included. Leather, alligator, NATO and rubber options are available in the 20mm strap section on milanostraps.it.

Longevity depends on the leather type and conditions of use. A quality vegetable-tanned calf strap, properly conditioned with natural wax and kept away from water, typically lasts 2–4 years with daily wear. Alligator leather, being denser and more resilient, can last 5–7 years. Shell cordovan, owing to its tightly packed fibre structure, is among the most durable options. Casati Milano provides an 18-month warranty against manufacturing defects on all artisan straps.