Molex Crimping Tool 18–24 AWG for Mini-Fit Jr

The Molex 638111300 is the factory-recommended hand crimping tool for applying Mini-Fit Jr series 39-00-0060 (18–24 AWG) contacts, designed to produce consistent, IEC 60352-2 conforming crimp terminations in Mini-Fit Jr male and female housing contacts without the dimensional variation, contact resistance increase, or conductor damage that results from the use of generic pliers or non-qualified crimping tools. The 638111300 uses a ratcheted positive-stop mechanism that prevents tool release until the full crimp stroke is completed — a critical design feature that enforces consistent barrel-collapse geometry regardless of operator hand strength variation, making it the approved tool for panel shops building to ARAMCO GI-0036 panel wiring workmanship requirements and IEC 61439-2 assembly quality management systems. The ratchet cannot be overridden without damage, preventing the habitual incomplete-crimp error that is the primary cause of contact resistance increase and pull-out failure in Mini-Fit Jr connector field applications.

The 638111300 features a split-die crimping nest with separate wire barrel and insulation support cavities, producing a B-crimp (wire barrel) + F-crimp (insulation support) combination in a single tool stroke. The B-crimp collapses the contact wire barrel to the precise Molex-specified geometry with a measured crimp height (CH) tolerance of ±0.05 mm — a tolerance achievable only with a qualified precision tool, not with generic crimpers — and the simultaneous F-crimp on the insulation support provides strain relief that passes the 50 N pull-out force requirement of IEC 60352-2 for 18 AWG conductors and 25 N for 24 AWG. The tool accepts 18 AWG, 20 AWG, 22 AWG, and 24 AWG conductors in dedicated labelled crimp positions, preventing the use of an oversized or undersized crimp station through clearly marked position stops. Total handle length is 200 mm with rubber-grip handle inserts providing a comfortable grip during extended production crimping sessions in Saudi panel fabrication shops where wire harness crimping is a continuous manufacturing activity.

In the Saudi panel fabrication sector, the Molex 638111300 is the standard crimping tool held by panel shops building ARAMCO and SABIC-specified panels using Mini-Fit Jr connectors. ARAMCO's Panel Fabrication Inspection procedure GI-0036 requires that all crimping tools used in approved vendor panels be manufacturer-qualified and that crimp quality be verified by pull-test sampling — requirements that effectively mandate the use of the OEM-recommended 638111300 tool rather than generic alternatives. SABIC's panel shop approval procedure at the Al-Jubail fabrication vendor qualifications likewise lists the Molex qualified crimping tool as a mandatory held tool for any shop claiming Mini-Fit Jr connector capability on their shop capability matrix. The tool's compact size (overall length 200 mm, weight 340 g) allows panel wiring technicians to carry it alongside other pocket tools during panel build and maintenance operations, and its standard plier-grip ergonomics allow technicians experienced with other manufacturer's ratchet crimp tools (TE AMP CT, Phoenix Contact CRIMPFOX) to use it without additional dexterity training.

Razz Middle East supplies the Molex 638111300 crimping tool alongside the complete Mini-Fit Jr connector family (male and female housings, all circuit counts, both 18–24 AWG contacts) and the corresponding Molex 638190800 inspection gauge for crimp height verification. We also supply the Molex extraction tool for removing individual contacts from mated housings during maintenance rework, completing a full Mini-Fit Jr tooling kit available in a single Razz Middle East order. We provide crimping application notes and pull-test specification sheets on request.