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Red nylon wire cap connectors, pack of 25

3M

3M MTI18-250Q Wire Cap Connectors Red Nylon PK25

SKU CH-T4TX-8MB94

Red nylon quick-disconnect wire caps accept 22 to 18 AWG copper wire and are UL listed, CSA certified and EU compliant

  • Product typeElectrical Connectors
  • Quick-disconnect tabs speed wiring changes
  • Red nylon insulation resists heat to 221 °F
  • Crimp barrels accept 22–18 AWG wire
  • UL listed and CSA certified for safety
  • Pack of 25 covers multiple jobs

What it is

3M MTI18-250Q wire cap connectors are red nylon quick-disconnect terminals for 22 to 18 AWG copper wire. The pack contains 25 pieces rated for 1000 V and a maximum operating temperature of 221 degrees F. They suit automotive and general electrical wiring where a secure crimp connection is required.

Thermals noise power

The nylon insulation provides full coverage and is rated to withstand 221 degrees F in normal operation. No active cooling or moving parts are present so the connectors produce no noise. Power draw is determined solely by the circuit they complete and the 1000 V maximum voltage rating.

What the accessories change

The pack supplies 25 identical terminals with butted seams and tin-finished copper contacts sized for a 0.25 in tab width and 0.032 in tab thickness. No additional tools, software or mounting hardware are included so the installer must provide a suitable crimp tool for the 22 to 18 AWG range.

How it compares

Measured against everything we stock in Wire Connectors & Cable Ties, at today’s prices. Recalculated every night.

Price $7.99
Cheaper than about 70% of the 1,040 comparable items (median $13.99).

Specifications

Product
Brand name3M
Product typeElectrical Connectors

Questions about this item

How do I crimp the 22-18 AWG wire into the butted-seam barrel without splitting the seam?

Strip the wire to the barrel length, seat it fully in the .065 in. inside-diameter barrel, then crimp with a ratchet tool sized for 22-18 AWG butted seams so the jaws close evenly and do not rock the seam open.

Will the nylon insulation and tin-plated copper contacts need periodic re-crimping or replacement in a high-vibration harness?

The nylon insulation and tin-plated copper are rated for the full 221 °F operating range; no scheduled re-crimping is required, but inspect for cracked insulation or loose tabs after severe vibration events.

At what current does the .032 in. thick, .25 in. wide tab become the limiting factor during sustained loads?

The .032 in. by .25 in. tab cross-section and 1,000 V rating set the practical continuous-current ceiling; exceeding the tab's ampacity causes heating before the 221 °F insulation limit is reached.

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