--- 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: "3901330₫" currency: VND in_stock: true category: "Captain O Ring" url: https://www.desertcart.vn/products/581742312-captain-o-ring-llc-captain-o-ring-boss-hydraulic-sae store_origin: VN region: Vietnam --- # 12 sorted sizes in durable case -40°F to 250°F temp range 255 precision 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:** 3901330₫ **Availability:** ✅ In 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?** 3901330₫ with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.vn](https://www.desertcart.vn/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 - • **Effortless Organization:** Shatterproof Flambeau case with individual compartments and size chart for instant O-ring identification. - • **Proudly Made in the USA:** Manufactured and warrantied by Captain O-Ring LLC, combining quality with reliability. - • **Comprehensive Seal Arsenal:** 255 Buna-Nitrile O-rings covering 12 essential BOSS/ORB sizes for flawless hydraulic sealing. - • **Extreme Temperature Resilience:** Operates reliably from -40°F to 250°F, ensuring peak performance in diverse environments. - • **Trusted Hydraulic Compatibility:** Premium BN70 material resists oils and hydraulic fluids, guaranteeing leak-proof connections. ## Overview The Captain O-Ring BOSS Hydraulic SAE 900 Seal Kit offers 255 high-quality Buna-Nitrile (BN70) O-rings in 12 sizes, designed specifically for hydraulic ORB/BOSS fittings. With a robust temperature range of -40°F to 250°F and resistance to oils and hydraulic fluids, this kit ensures reliable, leak-proof sealing. Packaged in a durable, compartmentalized case with a size chart, it streamlines maintenance and repairs. Proudly assembled in the USA and backed by a warranty, it’s the go-to solution for professional-grade hydraulic sealing. ## 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. ## 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 | | ASIN | B01BE5J23K | | Best Sellers Rank | #265,900 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #369 in Faucet O-Rings | | Brand Name | Captain O-Ring | | Color | Black | | Customer Reviews | 4.7 4.7 out of 5 stars (172) | | Customer reviews | 4.7 4.7 out of 5 stars (172) | | Date First Available | 11 June 2019 | | Is Discontinued By Manufacturer | No | | Item model number | BOSS255-BN70 | | Manufacturer | Captain O-Ring LLC | | Manufacturer | Captain O-Ring LLC | | Material Type | Synthetic Rubber | | Model | BOSS255-BN70 | | Number of Items | 1 | | Number of Pieces | 255 | | Package Dimensions | 22.9 x 12.5 x 3.5 cm; 228 g | | 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/61McUTf2fgL.jpg) ## 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.vn/products/581742312-captain-o-ring-llc-captain-o-ring-boss-hydraulic-sae](https://www.desertcart.vn/products/581742312-captain-o-ring-llc-captain-o-ring-boss-hydraulic-sae) --- *Product available on Desertcart Vietnam* *Store origin: VN* *Last updated: 2026-09-25*