Bolt, Discharge Elbow/after- Cooler, B3000-t29s, 8mx20mm
Coleman, Sanborn Pumps & Parts

Price: $2.36
Found under the following brands:
Chicago Pneumatic, US General, Belaire, Kobalt, NAPA, IMC-ATLAS COPCO
This part is available in the following kits
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Intercooler Kit
Price: $224.67