3M 26127, PPS Series 2.0 Adapter, Type S31, 1/8 Male, 28 Thread BSP, 7100135953 
Insize 7321-T16, SCREW THREAD POINT, 4.5-3.5TPI/5.5-7mm, pair, 6928640348518
$38.59
internal thread (60? thread angle)
SCREW THREAD POINT, 4.5-3.5TPI/5.5-7mm, pair
For use with Screw Thread Microsmeter Series # 3281
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