Bolt Size for 15" Hinged String Trimmer (ST1500SF)

  • 1
  • Question
  • Updated 2 years ago
  • Answered
I recently lost both bolts that lock the shaft in place on the 15" trimmer (model ST1500SF).

Does anyone know the exact size of these bolts?
Photo of Anthony


  • 70 Points

Posted 2 years ago

  • 1
Photo of (a)Typical Engineer

(a)Typical Engineer

  • 26,632 Points 20k badge 2x thumb
M4 (e.g. metric 4mm diameter) sounds right, but I'm thinking more like 35-40 mm 1-3/8" to 1-1/2".  SHCS = socket head cap screw.  Best way to get a replacement is to visit the local neighborhood hardware store (or big box store if you must).
Photo of Alison Lum

Alison Lum

  • 80 Points 75 badge 2x thumb
We bought M4 x M40 and M5 x M40 socket head cap screws and the M5 x M40 screws work.  We also confirmed with the customer support that the dimensions for the bolt are M5 by M25.