Technical Data:
Product type: Tubular Inside Micrometer, Extension-Pipe Type
Measurement: Inside dimension
Reference setting: Optional reference gage required for accurate setting
Measuring faces: Carbide-tipped
Graduation: 0.01 mm for metric models / 0.001 in for inch models
Series: 139
Measuring range: 4 - 52 in
Micrometer head stroke: 1 in
Extension pipe quantity: 6
Main unit range: 4 - 5 in

Content:
Extension pipes:
1 in
2 in
4 in
8 in
16 in (2 pcs.)

Dimensions:
Series 139 family reference drawing:
Representative family assembly is shown with an overall reference length of 2075 mm
Left measuring tip Dia.=8 mm
Right measuring tip Dia.=8 mm
Reference outer diameters=Dia.16 mm, Dia.20 mm and Dia.18 mm
Left-end reference length=4.5 mm
Micrometer-body reference length=47 mm
Right-end reference length=3 mm
Measuring faces=SR10 both ends