When you need a replacement seal, the first surprise is how many sealing components look alike. In the seals, gaskets, and O-rings category, two kits can both be new, both be industrial, and still serve completely different repair jobs. That's exactly what you have here: a pair of SKF oil seals with a precise size and MPN, and a set of AS568-235 Buna 70 duro O-rings in a standard dash size. Neither is a clear winner on price alone, because they cost almost the same. The right pick depends on what you're actually sealing.
Quick verdict
Choose the SKF oil seals if your job is an oil seal replacement with a known size. Choose the AS568-235 Buna O-ring set if you want a ready supply of O-rings for hydraulic, pneumatic, automotive, fuel, or oil sealing repairs. At $19.99 versus $20.00, the price difference is a penny - so let the application decide.
Comparison table
| Product | Price | Type | Quantity | Material / notes |
|---|---|---|---|---|
| SKF 1.375" x 2.125" x .313" Industrial Oil Seals | $19.99 | Oil Seal | 2 | SKF MPN 13649, new in box |
| AS568-235 Buna 70 Duro O-Ring Set | $20.00 | O-Ring | 25 | Buna-N (nitrile), 70 durometer, new old stock |
Where the SKF oil seals win
The SKF seals are the more specific fix. The dimensions are right in the product title, and the MPN 13649 gives you a part number to cross-reference against a bill of materials or a worn-out seal. Because you get more than one seal in the box, you have a spare on hand for a second shaft or a repeat repair. If you already know the size fits, this is the direct replacement.
Where the AS568-235 Buna O-ring set wins
The Buna O-ring set is the broader maintenance buy. It provides a substantial quantity of rings in a widely used standard size, and the Buna-N (nitrile) material with 70 durometer hardness is a common matchup for hydraulic and pneumatic applications. The set is listed as new old stock, and because all 25 rings are the same size, you get consistent spares for the same O-ring groove.
Product notes
SKF 1.375" x 2.125" x .313" Industrial Oil Seals (2-Pack)
If your maintenance job is a worn oil seal on a specific shaft, this lot of SKF seals gives you the exact dimensions in the title and an MPN you can cross-reference. The box includes a spare for a repeat repair. The limitation is the fixed size: it only helps if your application calls for that 1.375-inch by 2.125-inch by .313-inch configuration, and because these are oil seals rather than O-rings, you cannot stretch them into service as a general-purpose ring. Confirm your shaft and housing dimensions before ordering, since the dimensions in the title are the sizing information shown.
AS568-235 Buna 70 Duro O-Ring Set (25-Pack)
This is the stock-up option. Twenty-five AS568-235 O-rings in Buna-N (nitrile) with a 70 durometer hardness cover a broad range of hydraulic, pneumatic, automotive, fuel, and oil sealing jobs where a standard-size O-ring fits. You get enough rings to keep spares on hand or to handle a multi-port repair at once. The limitation is that all 25 rings share the same AS568-235 dimension, so larger or smaller fittings need a different size. The description notes these are new old stock, so the compound and dash size shown are the identifiers to match against your existing O-ring.
Final choice by use case
For a specific oil seal replacement with a known size, the SKF seals are the cleaner pick. For a general-purpose O-ring restock that supports hydraulic, pneumatic, automotive, fuel, and oil sealing repairs, the AS568-235 Buna 70 duro set gives you more uses per dollar. The deciding factor is the shape of the seal you need, not the coin difference in price.
