--- product_id: 581742312 title: "Captain O-Ring LLC Captain O-Ring BOSS Hydraulic SAE 900 O-Ring Seal Kit (Buna-N 70-255 Piece Kit)" brand: "captain o-ring" price: "R$19" currency: BRL in_stock: false reviews_count: 5 category: "Captain O Ring" url: https://www.desertcart.com.br/products/581742312-captain-o-ring-llc-captain-o-ring-boss-hydraulic-sae store_origin: BR region: Brazil --- # 12 sizes in organized case -40°F to 250°F temp range 255 premium BN70 o-rings Captain O-Ring LLC Captain O-Ring BOSS Hydraulic SAE 900 O-Ring Seal Kit (Buna-N 70-255 Piece Kit) **Brand:** captain o-ring **Price:** R$19 **Availability:** ❌ Out of Stock ## Summary > 🔧 Seal like a boss — never let a leak slow your flow! ## Quick Answers - **What is this?** Captain O-Ring LLC Captain O-Ring BOSS Hydraulic SAE 900 O-Ring Seal Kit (Buna-N 70-255 Piece Kit) by captain o-ring - **How much does it cost?** R$19 with free shipping - **Is it available?** Currently out of stock - **Where can I buy it?** [www.desertcart.com.br](https://www.desertcart.com.br/products/581742312-captain-o-ring-llc-captain-o-ring-boss-hydraulic-sae) ## Best For - captain o-ring enthusiasts ## Why This Product - Trusted captain o-ring brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Temperature Toughness:** Operates reliably from freezing -40°F to scorching 250°F, ensuring durability in extreme conditions. - • **Effortless Organization:** Shatterproof Flambeau case with individual compartments and size chart for instant o-ring identification. - • **Comprehensive Seal Arsenal:** 255 Buna-N o-rings covering all essential BOSS/ORB sizes for flawless hydraulic sealing. - • **Trusted Quality & Warranty:** Proudly USA-assembled with a 1-year warranty, guaranteeing performance and peace of mind. - • **Cost-Effective Pro Solution:** Save big compared to local hydraulic shops without compromising on premium sealing reliability. ## Overview The Captain O-Ring BOSS Hydraulic SAE 900 O-Ring Seal Kit offers 255 high-grade Buna-N (BN70) o-rings in 12 sizes, designed specifically for hydraulic ORB/BOSS fittings. With a wide temperature tolerance from -40°F to 250°F and a durable, organized Flambeau case, this kit ensures quick, reliable sealing solutions for professionals. Proudly made in the USA and backed by a 1-year warranty, it’s the ultimate cost-effective choice for maintaining hydraulic systems with confidence. ## Description Captain O-Ring's 255 Piece ORB / BOSS Hydraulic BN70 O-Ring Kit includes 12 sizes and 255 total o-rings. The kit includes o-ring sizes 904, 905, 906, 907, 908, 909, 910, 911, 912, 913, 914, 916 which are used to seal straight thread tube fittings (BOSS Type) found in hydraulic equipment. This kit contains o-rings made of Buna Nitrile (70 durometer) material, also known as BN70. BN70 is the most common and most practical o-ring material used in BOSS seal applications due to its resistance to many hydraulic fluids and its flexability/sealability in low temperatures. The included size chart on the front of the kit makes sizing up o-rings quick and effortless. O-Rings are conveniently sorted by size in a shatterproof Flambeau divider box. Includes: -904 (35 pieces) -905 (35 pieces) -906 (30 pieces) -907 (25 pieces) -908 (25 pieces) -909 (20 pieces) -910 (20 pieces) -911 (15 pieces) -912 (15 pieces) -913 (15 pieces) -914 (10 pieces) -916 (10 pieces) What to expect: This item includes 255 O-Rings in a Flambeau plastic divider case with "Captain O-Ring" branded packaging. Manufactured and warrantied against defect for one year by Captain O-Ring LLC. "Captain O-Ring" is a registered trademark of Captain O-Ring LLC. Review: 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. Review: X - X ## Features - Includes high quality BN70 (Buna Nitrile 70 durometer) o-rings - the most common o-ring material for hydraulic ORB/BOSS fittings due to it’s excellent sealing ability and resistance to oils and hydraulic fluid. Service temperature of -40F to 250F. - Includes all 12 BOSS/ORB o-ring sizes between -904 to -916. 255 total o-rings. - Used in sealing straight thread tube fittings (ORB / O-Ring Boss Type) in hydraulic equipment - O-Rings are conveniently sorted by size in individual compartments within the divider box with a convenient o-ring size chart included on the kit to quickly and easily size up and identify the o-ring you need. - Manufactured and Warrantied by Captain O-Ring LLC. Proudly assembled in the USA! ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B01BE5J23K | | Best Sellers Rank | #265,749 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #370 in Faucet O-Rings | | Brand Name | Captain O-Ring | | Color | Black | | Customer Reviews | 4.7 out of 5 stars 172 Reviews | | Manufacturer | Captain O-Ring LLC | | Material | Synthetic Rubber | | Material Type | Synthetic Rubber | | Model | BOSS255-BN70 | | Number of Items | 1 | | Number of Pieces | 255 | | Part Number | BOSSKIT-255pcBN70 | | Temperature Range | 2.5E+2 Degrees Fahrenheit | | UPC | 722589526572 | | Unit Count | 255 Count | ## Product Details - **Brand:** Captain O-Ring - **Color:** Black - **Material:** Nitrile Rubber - **Temperature Range:** 2.5E+2 °F - **UPC:** 722589526572 ## Images ![Captain O-Ring LLC Captain O-Ring BOSS Hydraulic SAE 900 O-Ring Seal Kit (Buna-N 70-255 Piece Kit) - Image 1](https://m.media-amazon.com/images/I/41T6lqI7jvL.jpg) ![Captain O-Ring LLC Captain O-Ring BOSS Hydraulic SAE 900 O-Ring Seal Kit (Buna-N 70-255 Piece Kit) - Image 2](https://m.media-amazon.com/images/I/41g8Q2RTMML.jpg) ![Captain O-Ring LLC Captain O-Ring BOSS Hydraulic SAE 900 O-Ring Seal Kit (Buna-N 70-255 Piece Kit) - Image 3](https://m.media-amazon.com/images/I/41BjeQP7VHL.jpg) ![Captain O-Ring LLC Captain O-Ring BOSS Hydraulic SAE 900 O-Ring Seal Kit (Buna-N 70-255 Piece Kit) - Image 4](https://m.media-amazon.com/images/I/51XGvYo46nL.jpg) ![Captain O-Ring LLC Captain O-Ring BOSS Hydraulic SAE 900 O-Ring Seal Kit (Buna-N 70-255 Piece Kit) - Image 5](https://m.media-amazon.com/images/I/41begCR0mFL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Great alternative for spending a ton more at a local hydraulic shop. *by C***N on 27 March 2026* Exactly what I needed for ORB hydraulics. As others have mentioned the case is great quality compared to others. ### ⭐⭐⭐⭐⭐ X *by R***H on 21 August 2026* X ### ⭐⭐⭐⭐ recommend *by J***N on 5 December 2025* decent selection ## Frequently Bought Together - Captain O-Ring - ORB BOSS Hydraulic Fitting SAE 900 O-Ring Seal Kit (Buna-N 70-255 Piece Kit, 12 Sizes) - Captain O-Ring ORS/ORFS (for Flat Face Fittings) Hydraulic O-Ring Seal Kit (Buna 90 / BN90-180 Piece Kit) - Captain O-Ring Flange Seal (SAE Code 61/62) Hydraulic O-Ring Seal Kit (Buna 90 / BN90-55 Piece Kit) --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.com.br/products/581742312-captain-o-ring-llc-captain-o-ring-boss-hydraulic-sae](https://www.desertcart.com.br/products/581742312-captain-o-ring-llc-captain-o-ring-boss-hydraulic-sae) --- *Product available on Desertcart Brazil* *Store origin: BR* *Last updated: 2026-09-22*