NATO and Single-Pass Straps

A pass-through strap changes the relationship between watch and wrist. Instead of two separate strap halves ending at the lugs, one strip runs behind the case and through both spring bars. The visible weave and metal rings give it a different character from leather, but the routing is the important distinction.

Two layers, two jobs

A traditional NATO-style construction adds a short retaining flap beneath the main strip. It limits how far the watch can slide along the strap. It is not the source of the main strip's potential retention if one spring bar fails: Crown & Buckle explains that its single-layer versions retain that feature after the secondary layer is removed. This is conditional protection, not a guarantee against losing a watch or a substitute for sound attachments. Crown & Buckle's construction explanation.

Removing a layer also reduces the stack under the case. Terms such as NATO, Zulu and single-pass are used for different commercial variants, so inspect the actual routing and hardware rather than assuming the name defines everything.

Managing the tail

The loose end belongs in the keepers. Crown & Buckle shows excess folded back through a keeper, while noting that a sufficiently short remaining tip can end near the second keeper without another fold. The correct result depends on strap length and wrist size. Wearing a NATO.

In the atelier

NATO, retaining flap includes the additional piece; Zulu, single pass omits it and changes the hardware. The Bond stripe, grey and olive options are visual palettes, not evidence of military issue or exact film-prop provenance. Both graphic assemblies are shown fastened, with a controlled tail, rather than sized to your wrist. They are not certified military equipment or simulations of nylon strength, moisture or wear.