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🔧 Seal like a boss — never get caught without the perfect o-ring!
The Captain O-Ring BOSS Hydraulic SAE 900 O-Ring Seal Kit features 255 high-quality Buna-N 70 durometer o-rings, covering 12 common BOSS/ORB sizes. Designed for hydraulic fittings, it offers excellent oil and fluid resistance with a wide service temperature range from -40°F to 250°F. Packaged in a durable, compartmentalized case with a size chart, this USA-assembled kit ensures quick identification and reliable sealing performance for professional-grade hydraulic maintenance.
| ASIN | B01BE5J23K |
| Best Sellers Rank | #28,849 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #48 in O-Rings |
| Brand | Captain O-Ring |
| Brand Name | Captain O-Ring |
| Customer Reviews | 4.7 out of 5 stars 173 Reviews |
| Manufacturer | Captain O-Ring LLC |
| Material | Buna-N Rubber |
| Material Type | Buna-N 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
2 weeks ago
2 days ago