Technical Data:
Internal screw thread micrometer
Measure pitch diameter of screw thread
Range: 150-1150mm
Micrometer head: 150-175mm
Micrometer head accuracy: +/-4um
Graduation: 0.01mm
Points of extension rods are spring loaded
Extension rods: 25mm, 50mm, 100mm, 200mm, 200mm, 400mm
Applicable measuring tips stem length: L=13.5mm
Extension rod 15mm accuracy: +/-1um
Extension rod 25mm accuracy: +/-1.25um
Extension rod 50mm accuracy: +/-1.25um
Extension rod 100mm accuracy: +/-2um
Extension rod 200mm accuracy: +/-3.5um
Extension rod 400mm accuracy: +/-4.5um

Dimensions:
Micrometer head/body diameter references=dia.16mm; dia.18mm; dia.6.8mm; dia.3.5mm
Drawing reference=43mm
Extension rod diameter reference=dia.16.5mm

Remark:
Optional measuring tips for internal screw thread micrometer: code 7385, stem length L=13.5mm
Supplied with manufacturer inspection certificate