Replacement bobbin case adjusting screw.
Tension Adjust Screw (New) for Singer Bobbin Case 153758 & More – Millard Sewing Center
ckpsms Brand - 20PCS #KP-19033 Bobbin Case Tension Screw for L M Size Bobbin Case and More
Sewing, ArmaStore
Sewing Accessories – Page 9 – Quality Sewing & Vacuum
Singer 700 Series - Bobbin Case Positioning
Adjusting Longarm Bobbin Tension
Bobbin Case Tension Spring 91-010166-05 Adjusting Screw 91-000928-15,91-000390-15 For PFAFF Shoe Machine 591,574,ZJ9610,ZJ9620
Bobbin Brake Spring KOBAN - for Amara, Forte, Infinity, Simply Sixteen
An original Bobbin Case is by far the best, so if your spring will not adjust the tension on the Bobbin Case thread (and you've checked to make sure
Bobbin Case Tension Spring
Bobbin Case Set Screw 3 / 4 / King
All – Page 109 – Quality Sewing & Vacuum
How to Adjust a Rotary Bobbin on Your Sewing Machine