Original package of five (5) Stearman Aircraft upper packing spacer ring, P/N 75-2649, confirmed by a Stearman factory engineering drawing. The drawing explicitly lists this part as identical to Bendix P/N 65537, which matches the factory-etched markings on these rings. These are new old stock (NOS) aluminum aircraft components.

Identified on authentic Stearman drawing as: “RING – UPPER PACKING SPACER (OPTIONAL)”
Used in the packing/seal stack of a Stearman hydraulic or control assembly. Applicable to:

• PT-13

• PT-17

• PT-18

• U.S. Navy N2S series

• Other Stearman-built variants

These rings are correct for WWII-era Stearman trainer restorations.

Per Stearman Drawing 75-2649 (matches physical parts):

• OD: 3.308–3.311"

• ID: 2.685–2.688"

• Thickness: ~13/32"

• Material: Aluminum alloy WW-T-786, anodized

• Features: flat face + 45° chamfered face

• Markings: factory-etched “BENDIX 65537”, with inspection stamp

Identification Summary

• Stearman P/N: 75-2649

• Bendix P/N: 65537 (blueprint-verified equivalent)

• Official Name: Ring, Upper Packing Spacer

• Condition: NOS, never installed

Condition

• NOS aluminum rings

• Clear Bendix factory etching

• Clean surfaces, no corrosion

• Includes original shop tag marked “Ring – Upper Packing Spacer 75-2649”

Perfect for Stearman PT-13/ PT-17/ PT-18/ N2S restorations, display, or historical collections.