Gast · O-ring
AT256
O-RING
Manufacturer’s part numberWear part
Where to get it
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As printed in the source
11 ∆ | AT256 | CYLINDER O-RING | 1 (read by Claude, checked against the page)
Fits 12 models
As listed by GastWhen ordering, give the model and serial number from the nameplate: some parts changed within a model’s life.
In the manufacturer’s drawings
- Position 19 · Exploded viewO&M Manual: 106R_70-7400_B-2.pdf, p. 7
Part number, name and fitment as published by Gast (source), retrieved 2026-10-20. Vac & Air is independent and not affiliated with the manufacturers shown; names and numbers identify the parts only.