Manual Bolt Hole Probes

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Manual bolt hole probes have coils that are positioned at right angles to the probe’s shaft length. The probes are rotated by hand inside the bolt hole with the fastener removed. Standard (fractional and metric) and custom diameters are available with absolute and differential coils.

Manual bolt hole probes are available in an absolute (single coil) configuration with a Microdot connector or in a bridge or bridge differential configuration utilizing a Fischer/LEMO Triax connector. Standard manual bolt hole probes operate between 50 kHz and 500 kHz.

Probes listed feature a plastic tip and body for maximum durability. All probes have a split tip, which enables them to expand beyond the indicated nominal diameter range.

Hole Standard

Hole Standard
To view the complete list of probes for this line, please download the PDF here.

Hole X Type

Hole X
Type
Series
Frequency
Coil
Shielding
Range of Hole Size
Connector
Part ID
Item #
Cable ID
Item #
Manual Bolt Hole
Adjustable X Type
50 kHz - 500 kHz
Absolute Bridge
Unshielded
4.7 mm - 5.5 mm (0.187 in. - 0.218 in.)
Microdot
BXM-12-16
U8600094
9102894
U8800041
Manual Bolt Hole
Adjustable X Type
50 kHz - 500 kHz
Absolute Bridge
Unshielded
6.5 mm - 7.1 mm (0.250 in. - 0.281 in.)
Microdot
BXM-16-20
U8600098
9102894
U8800041
Manual Bolt Hole
Adjustable X Type
50 kHz - 500 kHz
Absolute Bridge
Unshielded
7.9 mm - 9.5 mm (0.312 in. - 0.375 in.)
Microdot
BXM-20-24
U8600101
9102894
U8800041
Manual Bolt Hole
Adjustable X Type
50 kHz - 500 kHz
Absolute Bridge
Unshielded
7.9 mm - 9.5 mm (0.312 in. - 0.375 in.)
Triax Fischer
BXM-20-24-TF
U8600103
9122244
U8800091
Manual Bolt Hole
Adjustable X Type
50 kHz - 500 kHz
Absolute Bridge
Unshielded
12.7 mm - 14.3 mm (0.5 in. - 0.562 in.)
Microdot
BXM-32-40
U8600112
9102894
U8800041
Manual Bolt Hole
Adjustable X Type
50 kHz - 500 kHz
Absolute Bridge
Shielded
9.5 mm - 11.0 mm (0.375 in. - 0.437 in.)
Microdot
BXMF-24-28
U8600128
9102894
U8800041

Hole Countersink

Hole Countersink
Type
Series
Frequency
Coil
Shielding
Range of Hole Size
Connector
Part ID
Item #
Cable ID
Item #
Manual Bolt Hole
Countersink
50 kHz - 500 kHz
Absolute Bridge
Unshielded
3.2 mm (0.125 in.)
Microdot
CSM100-8
U8600449
9102894
U8800041
Manual Bolt Hole
Countersink
50 kHz - 500 kHz
Absolute Bridge
Unshielded
4.0 mm (0.156 in.)
Microdot
CSM100-10
U8600132
9102894
U8800041
Manual Bolt Hole
Countersink
50 kHz - 500 kHz
Absolute Bridge
Unshielded
4.7 mm (0.187 in.)
Microdot
CSM100-12
U8600134
9102894
U8800041
Manual Bolt Hole
Countersink
50 kHz - 500 kHz
Absolute Bridge
Unshielded
5.5 mm (0.218 in.)
Microdot
CSM100-14
U8600608
9102894
U8800041
Manual Bolt Hole
Countersink
50 kHz - 500 kHz
Absolute Bridge
Unshielded
6.3 mm (0.25 in.)
Microdot
CSM100-16
U8600135
9102894
U8800041

Hole Countersink Stainless Steel

Hole Countersink
Type
Series
Frequency
Coil
Shielding
Range of Hole Size
Connector
Part ID
Item #
Cable ID
Item #
Manual Bolt Hole
Countersink Stainless Steel
50 kHz - 500 kHz
Absolute Bridge
Unshielded
3.2 mm (0.125 in.)
Microdot
CSM100-8-SS
U8602142
9102894
U8800041
Manual Bolt Hole
Countersink Stainless Steel
50 kHz - 500 kHz
Absolute Bridge
Unshielded
4.0 mm (0.156 in.)
Microdot
CSM100-10-SS
U8600133
9102894
U8800041
Manual Bolt Hole
Countersink Stainless Steel
50 kHz - 500 kHz
Absolute Bridge
Unshielded
4.7 mm (0.187 in.)
Microdot
CSM100-12-SS
U8602137
9102894
U8800041
Manual Bolt Hole
Countersink Stainless Steel
50 kHz - 500 kHz
Absolute Bridge
Unshielded
6.3 mm (0.25 in.)
Microdot
CSM100-16-SS
U8602138
9102894
U8800041
Manual Bolt Hole
Countersink Stainless Steel
50 kHz - 500 kHz
Absolute Bridge
Unshielded
8.0 mm (0.312 in.)
Microdot
CSM100-20-SS
U8600136
9102894
U8800041
Manual Bolt Hole
Countersink Stainless Steel
50 kHz - 500 kHz
Absolute Bridge
Unshielded
8.7 mm (0.343 in.)
Microdot
CSM100-22-SS
U8600957
9102894
U8800041
Manual Bolt Hole
Countersink Stainless Steel
50 kHz - 500 kHz
Absolute Bridge
Unshielded
9.5 mm (0.375 in.)
Microdot
CSM100-24-SS
U8600958
9102894
U8800041