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🔧 Seal like a boss — never get caught without the perfect O-ring!
The Captain O-Ring ORB BOSS Hydraulic Fitting SAE 900 O-Ring Seal Kit offers 255 premium Buna-N (70 durometer) o-rings in 12 essential sizes, designed specifically for hydraulic ORB/BOSS fittings. With a robust temperature tolerance from -40°F to 250°F and a neatly organized case featuring a size chart, this USA-assembled kit ensures professional-grade sealing reliability and convenience for hydraulic maintenance and repairs.
| ASIN | B01BE5J23K |
| Best Sellers Rank | #66,634 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #154 in O-Rings |
| Brand | Captain O-Ring |
| Brand Name | Captain O-Ring |
| Color | Black |
| Customer Reviews | 4.7 out of 5 stars 173 Reviews |
| Manufacturer | Captain O-Ring LLC |
| Material | Nitrile Rubber |
| Material Type | Nitrile Rubber |
| Model | BOSS255-BN70 |
| Number of Pieces | 255 |
| Part Number | BOSSKIT-255pcBN70 |
| Set Name | 255 Piece ORB / BOSS Hydraulic BN70 O-Ring Kit |
| Temperature Range | 2.5E+2 Degrees Fahrenheit |
| UPC | 722589526572 |
| Unit Count | 1 Count |
C**N
Great alternative for spending a ton more at a local hydraulic shop.
Exactly what I needed for ORB hydraulics. As others have mentioned the case is great quality compared to others.
M**N
Good variety
Good selection at a reasonable price. Haven't had much use thus far but it's good knowing there's a stock of various o-rings onhand if anything arises.
J**N
recommend
decent selection
D**6
Nice set!
Nice set of o-rings in an awesome case. That's usually the problem with these kits, the case is junk and falls apart and your stuff ends up on the ground. Not this kit. Has all the common sizes and feel like quality o-rings.
T**Y
They fit!
I have HF's SAE and metric kits, and the boxes are mostly full. Why? because they don't fit anything. They are close but I think manufacturers deliberately make "O" rings that can't be replaced by any in these kits, LOL. I needed ORB "O" rings for hydraulic fittings I just had hoses, made for and the Captain -O-Ring kit fit and worked great, with NO leaks. I am happy.
T**C
Great assortment
Great set, fit very well and I guess only time will tell how long they last. Large assortment of sizes and all fit my machine so far. Great value for the price. Case is nice to keep them organized and it is not flimsy.
W**N
Great seller
Great product
D**M
Transmission
My transmission had stopped working on my tractor and I used your o ring to fix it like new. 😁
Trustpilot
1 month ago
3 days ago