Lee Precision 7/16" x .070 SB2155 O-ring for dies and equipment

O-Ring 7/16" x .070 SB2155

The O-ring is the elastic seal that Lee Precision uses to provide friction and a seal for adjustable die components and accessories: when housed in its seat, it keeps the adjusted part in place and compensates for tolerances without locking it rigidly.

This size has an internal diameter of 7/16 of an inch and a cross-section of .070 of an inch. In the Lee spare parts catalog, O-rings are listed and ordered by these two dimensions, because similar sizes are not interchangeable: an ring that is too thin provides no friction, while one that is too thick prevents adjustment. The O-ring is a consumable material and should be replaced when it becomes flattened, hardened, or cut.

Main features

• Component: replacement O-ring
• Internal diameter: 7/16" (approx. 11.1 mm)
• Cross-section: .070" (approx. 1.78 mm)
• Lee designation: O-RING 7/16 X .070
• Lee code: SB2155

Recommended use

Seal listed by Lee among the spare parts for reloading equipment, including the Load-Master progressive press, where it is used in the seats indicated in the manufacturer's exploded view.

Manufacturer code: SB2155