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Black nitrile O-ring assortment, 200 pieces in 15 metric sizes, compartment box

Unique-Bargains

Unique-Bargains 200pcs Metric O-Ring Assortment Kit

SKU CH-B21A-7YTZ9

200-piece metric nitrile O-ring kit with 15 sizes from 6 mm to 24 mm, rated from -30 °F to 250 °F for plumbing and automotive seals

  • Covers many jobs with 200 pieces across 15 metric sizes
  • Operates from -34 °C to 121 °C for broad temperature tolerance
  • Nitrile rubber resists oils, greases, hydraulic fluids and alcohol
  • 50A durometer gives reliable sealing on cylinders, valves and flanges
  • Avoid UV, ozone, acetone and ethers to prevent material degradation

O-Ring Assortment Kit 200pcs Metric

This kit supplies two hundred nitrile rubber O-rings across fifteen metric sizes for plumbing and automotive sealing tasks. The black rings have a 50A durometer and suit a wide temperature range from -30 degrees F to 250 degrees F. They resist petroleum oils, greases, hydraulic fluids, alcohol, mineral oil and grease in engines, faucets, valves and cylinders.

Suitable Uses And Limitations

Mechanics and technicians who need a ready selection of standard metric seals for fuel, oil and hydraulic systems will find the assortment practical. Buyers requiring resistance to acetone, ethers, esters, ozone, sunlight or weathering should choose a different elastomer. The material is not suited for ozone-generating electric motors, welding equipment or UV-exposed applications.

Nitrile Rubber 50A Durometer Temperature Range

The single specification that decides fit is the Buna-N material with a 50A durometer rated from -34 degrees C to 121 degrees C. This defines the fluid compatibility and thermal limits for every ring in the kit. If your sealing task falls outside this chemical and temperature window, the assortment will not perform reliably.

How it compares

Measured against everything we stock in Caulking & Sealing Supplies, at today’s prices. Recalculated every night.

Price $8.99
Cheaper than about 80% of the 631 comparable items (median $16.99).

Specifications

Product
Brand nameUnique Bargains

Questions about this item

Should I choose the 1.9 mm cross-section rings or the 2.4 mm and 3 mm cross-section rings?

The 1.9 mm cross-section covers inner diameters from 6 mm to 10 mm in packs of 20. The 2.4 mm cross-section covers 12 mm to 20 mm in packs of 15. The single 3 mm cross-section size is 24 mm with 5 pieces.

What does the 50A durometer mean once the O-ring is installed?

A 50A durometer indicates a relatively soft nitrile rubber that conforms easily to mating surfaces, helping maintain a pressure and fluid seal in engines, faucets, valves and cylinders.

What temperature range does the nitrile material actually withstand in service?

The kit is rated for continuous use from -34 °C to 121 °C (-30 °F to 250 °F), covering most automotive, plumbing and hydraulic fluid sealing tasks.

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