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©2011 Tyco Electronics Corporation, a TE Connectivity Ltd. Company
All Rights Reserved
*Trademark  

TE Connectivity, TE connectivity (logo), and TE (logo) are trademarks.  Other logos, product and/or Company names may be trademarks of their respective owners. 

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Instruction Sheet

TOOLING ASSISTANCE CENTER 1-800-722-1111
PRODUCT INFORMATION 1-800-522-6752

This controlled document is subject to change.
For latest revision and Regional Customer Service, 
visit our website at www.te.com

LOC B

408-6610

CERTI-CRIMP* Hand Crimping 
Tool 90066-7 and Head
Assembly 90066-9

26 SEP 11  Rev E

PROPER USE GUIDELINES

Cumulative Trauma Disorders can result from the prolonged use of manually powered hand tools. Hand tools are intended for occasional use 

and low volume applications. A wide selection of powered application equipment for extended-use, production operations is available.

Figure 1

1. INTRODUCTION

Hand Crimping Tool 90066-7 and Head Assembly 
90066-9 (shown in Figure 1) are designed to crimp 
Type III+ and Type VI, and commercial MATE-N-LOK* 
contacts listed in Figure 2. Read these instructions 
thoroughly before crimping any contacts.

All dimensions on this document are in metric units 

[with U.S. customary units in brackets]. Figures and 

illustrations are for reference only and are not 

drawn to scale.

Reasons for reissue of this instruction sheet are 
provided in Section 6, REVISION SUMMARY.

2. DESCRIPTION 

(Figures 1 and 2)

The front of the tool (contact side), into which the 
contact is inserted, has the tool number marked on it. 

The back of the tool (wire side), into which the wire is 
inserted, has the wire size and color-code dots 
marked above each crimping chamber.

The tool features two fixed dies (crimpers), two 
movable dies (anvils), two crimping chambers, a 
contact support, a locator/insulation stop, an ejector, 
and ratchet.

The ratchet ensures full crimping of the contact. Once 
engaged, the ratchet will not release until the handles 
have been FULLY closed.

The dies bottom before the ratchet releases. 

This is feature ensures maximum electrical and 

tensile performance of the crimp. DO NOT re-

adjust the ratchet.

The locator/insulation stop has two functions. First, it 
positions the contact between the crimping dies, and 
second, it aids in locating the wire in the contact. In 
use, it rests in the locator slot. See Figures 2 and 3.

The contact support prevents the contact from 
bending during crimping. The ejector pulls the locator 
down and ejects the crimped contact when the tool 
handles are FULLY opened.

Type III+ contacts have a color dot located on the 

contact spring. Type VI contacts have the 

applicable wire size stamped on the underside of 

the insulation barrel.

3. CRIMPING PROCEDURE

Refer to Figure 2, and select wire of the specified size 
and insulation diameter for the type and part number 
of loose piece contact. Strip the wire to the length 
indicated. DO NOT cut or nick the wire strands.

On the BACK of the tool, identify the appropriate 
crimping chamber (according to the color dot and/or 
wire size markings). The markings on the contact must 
match the markings on the appropriate crimping 
chamber of the tool.

Refer to Figure 3, and proceed as follows:

1. Hold the tool so the BACK (wire side) is facing 
you.

2. Make sure the ratchet is released by squeezing 
the handles and allowing them to open FULLY.

3. Insert the contact (insulation barrel first) into the 
FRONT of appropriate crimping chamber. Position 
the contact in the crimpers so that the locator enters 
the locator slot of the contact.

Crimpers

Anvils

Front of Tool 

(Contact Side)

Ratchet

Contact 

Support

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