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Cómo medir con precisión pernos y tuercas métricos

Medir el tamaño, la longitud y el paso de rosca de pernos y tuercas métricos puede ser un poco confuso si no está familiarizado con el proceso. Aquí tiene instrucciones paso a paso para ayudarle a medir sus pernos y tuercas métricos con precisión:

Herramientas que necesitarás:

Regla métrica o calibrador de medición

Medidor de pernos de titanio JDC o herramienta para verificar roscas de tuercas y pernos

Un tutorial completo para principiantes

¿No sabes lo que estás haciendo? Consulta este tutorial detallado que cubre todo lo que necesitas saber sobre cómo medir pernos, tuercas y arandelas.

Ver tutorial
Measure before you build

Measure Your Hardware

Check out this guide to identify thread diameter, thread pitch, and thread length before assembling your custom hardware kit.

3D Bolt Reference
Loading 3D reference
Diameter Pitch Length
Step 01

Thread Diameter

The nominal size of the bolt family. This is what determines the matching hole and hardware size.

How: Measure across the widest outside edge of the threaded shaft — not the bolt head. Use calipers if you have them.
Step 02

Thread Pitch

The distance between threads. Bolts can share the same diameter but use different pitch.

How: Measure peak-to-peak between two adjacent threads. A pitch gauge is ideal; calipers also work on a clean bolt.
Step 03

Thread Length

How far the bolt reaches into the assembly. Measure with the bolt out, not installed.

Length note: For most bolts, measure from the underside of the head to the end of the threaded shaft. Countersunk bolts are measured differently because the head sits into the surface.
Measurement checklist

Confirm thread diameter, thread pitch, and thread length before choosing replacement hardware.

Before you order

Whenever possible, measure the original hardware outside the vehicle and confirm the pitch before tightening.

Ready to build?

Use your confirmed measurements in the JDC Kit Builder to choose the section, bolt style, finish, and quantity.

Ready to build?

Use your measurements in the JDC Kit Builder

Once you know the diameter, pitch, and length, open the kit builder to choose your section, bolt style, finish, and quantity.

Open Kit Builder

¿Qué pasa con las tuercas y arandelas?

Si ya ha sacado y medido el perno que desea emparejar con una tuerca o arandela, puede usar sus herramientas antiguas para determinar el tamaño que necesita.

La tuerca que necesita tendrá el mismo paso de rosca y diámetro del perno correspondiente.

La arandela tendrá el mismo diámetro que el perno, sin embargo el diámetro exterior dependerá del área que desee rellenar.

Common JDC Bolt Head Styles

Use this as a quick visual reference before choosing replacement hardware in the kit builder.

  • Flush-Fit Allen Head: low-profile custom finish
  • Allen Head: clean socket-head style with strong tool engagement
  • Flush-Fit Hex Flange: flush look with flange-style seating
  • Hex Flange: OEM-inspired fit with a built-in washer surface
  • Button Head: rounded, low-profile appearance
  • Countersunk: sits into a chamfered or countersunk surface

Herramientas para facilitar la medición

Want to double-check your measurements?

These tools help confirm thread diameter, pitch, and length before you order custom hardware.