The dimensions you listed represent standard metric sizes for Dowty Seals (also known as bonded seals or washers), where the first number indicates the
Inner Diameter (ID) and the second number represents the
Outer Diameter (OD) in millimeters: [
1,
2,
3]
- 10*20: 10 mm Inner Diameter × 20 mm Outer Diameter (Typically fits M10 metric threads).
- 12*25: 12 mm Inner Diameter × 25 mm Outer Diameter (Typically fits M12 metric threads).
- 12*28: 12 mm Inner Diameter × 28 mm Outer Diameter (An alternative wider OD option for M12 threads).
- 15*32: 15 mm Inner Diameter × 32 mm Outer Diameter (Typically fits M15 metric threads). [1]
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