Before you think about chemical compatibility, answer the size question: do you need one exact O-ring in quantity, or a range of sizes for whatever fails next? Two $9.99 O-ring options sit at opposite ends of that trade-off: a 125-pack of O-rings from Macho O-Ring and a metric O-ring assortment kit for repairs. Both fit the seals, gaskets and O-rings category, but they serve different toolboxes.
Quick Verdict
If you already know the exact seal size you need and want a consistent material for oils, chemicals, or higher heat, the Macho O-Ring pack is the straightforward buy. If you would rather have a range of metric sizes on hand for faucets, car repairs, air fittings, and gas lines, the assortment kit gives you more options from one box.
At a Glance
| Product | Price | What's Inside | Material | Best For |
|---|---|---|---|---|
| AS568 010 Black Viton O Rings 75 Durometer | FKM Seal | 125 Pack | Macho O-Ring | $9.99 | 125 O-rings in a single AS568-010 size | Viton (FKM), 75 durometer | Known-size replacements in demanding fluids |
| 1050PCS O-Ring Assortment Kit | 21 Metric Sizes for Car Repair, Faucet, Air, Gas | $9.99 | 1,050 O-rings in 21 metric sizes | Nitrile rubber (NBR) | General repairs where the right size is not obvious |
Where Each Product Wins
- Macho O-Ring Pack wins when you need a known size in bulk, especially in environments where oil, chemical, or high-temperature resistance matters.
- Metric O-Ring Assortment Kit wins when you are not sure which size you need and want labeled compartments that make the next repair quick to sort.
The right answer changes with your work: a single failing seal in a known machine points one way, while a mixed bin of possible fits points the other.
Product Notes
Macho O-Ring AS568-010 Viton Pack
This Viton (FKM) O-ring pack is built around a single AS568-010 size at a 75 Shore A durometer. If your equipment spec calls for that exact ring, you get a full box of the same size, so there is no sorting and no guessing. Viton is a strong fit for environments where oils, chemicals, and elevated temperatures are part of the job, and the standardized AS568 dimensions make it easy to match a known replacement. The trade-off is that a single-size pack only covers one dimension. If the repair involves a different diameter or a metric size, you will need to buy another pack. This is a precise, specialized choice for a specific sealing job, not a general-purpose assortment.
1050-Piece Metric O-Ring Assortment Kit
This kit covers 21 metric sizes, with inner diameters from 1 mm to 25 mm and thicknesses from 1 mm to 4 mm, so it is designed for repairs where the right ring is not obvious until you check. The plastic organizer box with labeled compartments keeps sizes separated and makes it easy to grab a likely fit for faucet, car, air, and gas work. The commercial-grade nitrile rubber resists oil, water, heat, and abrasion, and its operating range of -40°F to 248°F covers a wide range of everyday conditions. The limitation is material performance: nitrile rubber is well suited to common oils and water, but extreme chemical or high-heat service calls for a more specialized material. If the job involves aggressive chemicals or extreme heat, this assortment may not be the best fit. You will also have sizes you may never use, which is the trade-off of a broad assortment.
Final Choice by Use Case
- Known replacement in oil, chemical, or high-heat service: Macho O-Ring Pack
- Multi-size metric kit for faucet, car, air, and gas repairs: Metric O-Ring Assortment Kit
- Single-size consistency and predictable supply: Macho O-Ring Pack
- A grab-and-go organizer for everyday fixes: Metric O-Ring Assortment Kit
