Buna-N O-Ring

PG 21

Sealcon # OR-21-BN
Color Black
Hummel # 1.321.2100.17
Hummel O-Ring-NBR
Material Buna-N

Inner Diameter (D)
1.02" (26 mm)
Height (E)
.08" (2 mm)


If NEMA 4x or 6 (European IP 68 - submersible) is required, O-Rings or Seal Rings (ordered separately) should be used when mounting Strain Relief Fittings to a control panel, secured with a locking nut. The Straight Strain Relief fittings feature a molded O-Ring groove. For these fittings, the Buna-N O-Ring is the best solution. The Snap Elbows and some of the Conduit Fittings do not have a recess for an O-Ring. In that case, the Polyethylene Seal Ring would be the best choice, unless the hole can be beveled to accommodate an O-Ring.

Technical Data

Operating Temperature

-30°C to 120°C (-22°F to 248°F)


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