Guardian Black EDC Buckle: Fitting a 38mm Strap Setup

By Ratchet Belts - The Belt with No Holes | Nexbelt | Published: 2026-11-01

Category: How-to Guides

Learn how to fit the Guardian Black EDC Buckle to a 1.50-inch (38mm) strap: check width compatibility, seat the strap, tighten both set screws, and test the ratchet.

Quick answer

Fit the Guardian Black EDC Buckle only to a 1.50-inch (38mm) strap, slide the strap into the buckle channel, and tighten both set screws before wearing. This buckle will not work with 1.38-inch straps.

Why the 38mm strap width is non-negotiable

The Guardian Black EDC Buckle is designed exclusively for 1.50-inch (38mm) straps. Using a 1.38-inch strap will leave the buckle loose and the set screws without enough material to grip, so the belt can slip or separate under load. Before you start, measure your strap's width at the cut end with a ruler or caliper. If it reads closer to 35mm (1.38 inches), stop and source a 38mm strap instead.

When the set screws matter more than the clasp

This buckle uses a clasp plus two set screws. The clasp alone can feel secure during a quick try-on, but the set screws are what keep the strap from creeping out over a full day of wear. Tighten them firmly, but do not overtighten to the point of stripping. If you often swap buckles between straps, consider keeping a dedicated 38mm strap for this buckle so you are not loosening and retightening the screws repeatedly.

Step-by-step fitting process

Measure your strap width: Use a ruler or caliper to measure the strap at the cut end. It must read 1.50 inches (38mm). If it measures 1.38 inches, do not proceed; this buckle will not fit that strap. A quick measurement now prevents a loose buckle later.
Slide the strap into the buckle channel: Feed the cut end of the 38mm strap into the buckle's strap channel until it seats fully. Make sure the strap is not twisted and sits flush against the buckle body. Check that the strap goes in straight; a twisted strap will not tighten evenly.
Tighten both set screws: Using the correct screwdriver, tighten each set screw firmly. Alternate between the two screws so the clamp pressure stays even. Do not overtighten to avoid damaging the screw threads. Even pressure on both screws is the key to a secure hold.
Test the ratchet and pull: Give the strap a firm tug away from the buckle to confirm the set screws are holding. Then cycle the ratchet a few times to ensure the strap feeds and releases smoothly. If the strap slips, recheck screw tightness before wearing.
Trim excess strap if needed: Once fitted, try the belt on and mark where you want the strap to end. Cut the excess strap squarely with sharp scissors, then seal the cut edge if your strap material requires it. Trim only after confirming the buckle holds; you cannot undo a cut.

Product facts

Guardian Black EDC Buckle, Fits 1.50" [38mm] Strap: Fits 1.50-inch (38mm) straps only; will not fit 1.38-inch straps. Confirm your strap width before buying or fitting to avoid a loose, unsafe connection.
Guardian Black EDC Buckle, Fits 1.50" [38mm] Strap
Guardian Black EDC Buckle, Fits 1.50" [38mm] Strap: Features a scratch-resistant, powder-coated finish in granite black. The textured coating resists wear during daily use, so the buckle keeps its look longer.
Guardian Black EDC Buckle, Fits 1.50" [38mm] Strap: Includes two set screws for a more reliable hold than a clasp alone. Tightening both screws prevents the strap from slipping out during wear.