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408-2681

4 of 5

Rev C

Figure 9

3. Flex tool by opening and closing handles.

4. Tighten both lock screws.

5. Close the handles until the dies are bottomed but 
not under pressure. Check the measurement 
between the handles and, if necessary, repeat the 
adjustment procedure.

C. Gaging the Crimping Chamber

This inspection requires the use of plug gages 
conforming to the dimensions provided in Figure 9. 

To gage the crimping chamber, proceed as follows:

1. Remove traces of oil or dirt from the crimping 
chamber and plug gage.

2. Perform handle adjustment procedure according 
to Paragraph 5.2,B.

3. Close handles until dies are bottomed but not 
under pressure.

4. Insert GO element into the crimping chamber; but 
do not force it. The GO element must pass through 
the length of the crimping chamber. See Figure 9.

5. In the same manner, try to insert the NO-GO 
element into the crimping chamber. The NO-GO 
element may enter partially, but must not pass 
completely through the length of the crimping 
chamber. See Figure 9.

If the crimping chamber conforms to the gage 
inspection, the dies are considered dimensionally 
correct and should be lubricated with a THIN coat of 
any good SAE 20 motor oil. If the crimping chamber 
does NOT conform to the gage inspection, the dies 
must be returned for further evaluation and repair.

For additional information regarding the use of a plug 
gage, refer to Instruction Sheet 408-7424.

6. REPLACEMENT AND REPAIR

Customer-replaceable parts are listed in Figure 10.

A complete inventory should be stocked and 
controlled to prevent lost time when replacement of 
parts is necessary. Parts other than those listed should 
be replaced by TE Connectivity to ensure quality and 
reliability. Order replacement parts through your 
representative, or call 1-800-526-5142, or send a 
facsimile of your purchase order to 717-986-7605, or 
write to:

Suggested Plug Gage Design

Inspection of Crimping Chamber

GO 

Dim

NO-GO 

Dim

Dies Bottomed But 

Not Under Pressure

Crimping 

Chamber

GO Element

NO-GO Element

GO element must pass 

completely through the 

crimping chamber.

NO-GO element may enter 

partially, but must not pass 

completely through the 

crimping chamber.

90°

3.017 

[.1188]

Ref

0.5 [.02] 

R Max

0.13 ±0.03 

[.005 ±.001] 

Typ

“D”

25.4 [1.00] Typ

Die Closure 

Configuration

Enlarged End View 

of Gage Element

68321-1 F-CRIMP GAGE

WIRE 

SIZE(AWG)

GAGE ELEMENT DIMENSION

D (Diameter)

GO

NO-GO

GO

NO-GO

10

2.588-2.596 [.1019-.1022]

2.789-2.791 [.1098-.1099]

3.467-3.475 [.1365-.1368]

3.604-3.607 [.1419-.1420]

8

2.969-2.977 [.1169-.1172]

3.170-3.172 [.1248-.1249]

3.736-3.744 [.1471-.1474]

3.886-3.889 [.1530-.1531]

6

3.604-3.612 [.1419-.1422]

3.805-3.807 [.1498-.1499]

4.234-4.242 [.1667-.1670]

4.402-4.404 [.1733-.1734]

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