Measures: #3-48 x .375" long. Threading is 3/32" diameter aka .094"
NOTES
With 24-30S handle: (2) 39-1 screws are used to secure the 24-30S handle, one end of the handle knob will be silver, one gold.
On 10 Mag: Left Side Post Screw (uses 3)
On 9M, 109M : Post Screw (uses 6)
On 25GLS : 39-1 Top Right Side Screw
WARNING On 10KG, 15KG: Shift Housing Screw Penn REV0 ERROR DOES NOT FIT (uses 2 OF
23-15KG)
NOTE: 23-15KG has a thread diameter of 1/8" or .012".
On the Pre-50VSW first run reels, they used a thinner diameter threading 3/32" (.094) and that screw is a 39-1. Measure threads if you have the shift housing version of the 50VSW because it's possible to have an early run reel with the thinner screw in the shift housing.
NOTE: 70 Big Game Special (Precurser to the 70vs-before) definitely CANNOT use 23-15KG, it needs the 38-10 or as a sub if that is not available, the 39-1 screw