OSK™ Boss Premium O-Ring Kits SAE 900 Series

OSK™ Boss Premium O-Ring Service Kits from The O-Ring Store LLC provide reliable sealing solutions specifically designed for SAE 900 series straight-thread tube fittings. Each kit includes O-Ring sizes in multiple high-performance materials, including Buna-N, Viton®, EPDM, Urethane, and more, tailored to meet diverse sealing requirements. Engineered to withstand oils, hydraulic fluids, temperature extremes, and environmental challenges, OSK™ kits streamline maintenance, reduce downtime, and deliver superior sealing compared to traditional tapered threads.

Displaying 1 to 9 (of 9 Products)
Product Image Model Product Name Qty. Price Quantity Discounts
(image for) OSK™ SAE Boss O-Ring Seal Kit - SAE 900 - 155 Piece Buna-N 90 K155X8N90-900

OSK™ SAE Boss O-Ring Seal Kit - SAE 900 - 155 Piece Buna-N 90

OSK™ SAE Boss O-Ring Seal Kit This Kit contains 155 pieces and 8 of the most popular 900 series O-Rings. These Boss Seal O-Rings are used in sealing straight thread tube fittings (Boss Type) in the design and service of hydraulic equipment. The 900 series of dash numbers identifies the 20 sizes of boss seals. Except for size -901, the digits after the 9 identify the nominal tube size in 16ths of an inch. The tube size is its outside diameter...
 In Stock: 17
$17.500
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Quantity Discounts
1-3$17.500
4-11$15.500
12+$14.000
(image for) OSK™ SAE Boss O-Ring Kit 155 Piece Viton® Fluorocarbon FKM 90 Duro K155X8V90-900

OSK™ SAE Boss O-Ring Kit 155 Piece Viton® Fluorocarbon FKM 90 Duro

OSK™ SAE Boss O-Rings Seal Kit This Kit contains 155 pieces and 8 of the most popular 900 series O-Rings. These Boss Seal O-Rings are used in sealing straight thread tube fittings (Boss Type) in the design and service of hydraulic equipment. The 900 series of dash numbers identifies the 20 sizes of boss seals. Except for size -901, the digits after the 9 identify the nominal tube size in 16ths of an inch. The tube size is its outside diameter...
 In Stock: 15
$29.950
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Quantity Discounts
1-3$29.950
4-11$25.000
12+$22.500
(image for) OSK™ Industrial Boss Seal Kit | 212 Piece Hydraulic SAE | Buna-N 90 K212X20N90-OSK

OSK™ Industrial Boss Seal Kit | 212 Piece Hydraulic SAE | Buna-N 90

Get leak-free Boss connections, reduce downtime, and keep your hydraulic systems running with confidence. The OSK™ Industrial Boss Seal Kit K212X20N90-OSK is designed for technicians and maintenance teams who want dependable sealing without delays. This kit delivers the most common SAE Boss O-Ring sizes in one organized solution, helping you fix leaks fast, avoid repeat failures, and keep equipment in service. Built with Buna-N 90 durometer...
 In Stock: 32
$24.950
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Quantity Discounts
1-2$24.950
3-24$22.950
25-99$21.920
100+$18.800
(image for) OSK™ Industrial Boss Seal Kit - Viton®/FKM 90 Durometer | 212-Piece SAE Hydraulic O-Ring Set K212X20V90-OSK

OSK™ Industrial Boss Seal Kit - Viton®/FKM 90 Durometer | 212-Piece SAE Hydraulic O-Ring Set

Maximize the efficiency and reliability of your sealing solutions with our Industrial Boss Seal Kit (#K212X20V90-OSK). Engineered specifically for SAE straight thread boss fittings, this kit delivers precision sealing performance ideal for demanding hydraulic and pneumatic applications. Key Features: Material: Viton®/FKM, 90 Durometer – Exceptional resistance to high temperatures, aggressive chemicals, and harsh environmental conditions....
 In Stock: 24
$112.000
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Quantity Discounts
1-4$112.000
5-24$91.500
25-99$77.780
100+$70.000
(image for) OSK™ SAE Boss O-Ring Seal Kit - 250 Piece Buna-N 70 K250X12N70-900

OSK™ SAE Boss O-Ring Seal Kit - 250 Piece Buna-N 70

OSK™ SAE Boss O-Ring Seal Kit – 250 Pieces High-Performance Sealing for Hydraulic Equipment The OSK™ SAE Boss O-Ring Seal Kit is an essential solution for sealing straight thread tube fittings (Boss Type) in hydraulic systems. This kit includes 250 pieces of the 12 most popular 900-series Boss O-Rings , ensuring compatibility with a wide range of hydraulic applications. Why Choose the OSK™ SAE Boss O-Ring Seal Kit? Comprehensive...
 In Stock: -4
$28.890
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Quantity Discounts
1-3$28.890
4-11$26.010
12+$21.670
(image for) OSK™ SAE Boss O-Ring Seal Kit – 250 Pieces (Buna-N 90 Durometer) K250X12N90-900

OSK™ SAE Boss O-Ring Seal Kit – 250 Pieces (Buna-N 90 Durometer)

High-Performance Sealing for High-Pressure Hydraulic Applications The OSK™ SAE Boss O-Ring Seal Kit is a must-have for sealing straight thread tube fittings (Boss Type) in high-pressure hydraulic systems. This kit includes 250 pieces of the 12 most commonly used 900-series Boss O-Rings , specifically made from Buna-N 90 Durometer (NBR) for superior resistance to extreme pressures and harsh environments. Why Choose the OSK™ SAE Boss O-Ring...
 In Stock: 32
$28.000
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Quantity Discounts
1-4$28.000
5-24$23.010
25+$20.000
(image for) OSK™ SAE Boss O-Ring Seal Kit - 250 Piece Fluorocarbon FKM 75 K250X12V75-900

OSK™ SAE Boss O-Ring Seal Kit - 250 Piece Fluorocarbon FKM 75

OSK™ SAE Boss O-Ring Seal Kit The 900 series of dash numbers identifies the 20 sizes of boss seals. Except for size -901, the digits after the 9 identify the nominal tube size in 16ths of an inch. The tube size is its outside diameter (OD). For example, size -903 is intended for use with 3/16-inch tube. The one exception, size -901, is intended for use with 3/32-inch tube. 1/16-inch tube is not common in aircraft use. This Kit contains 250...
 In Stock: 4
$74.450
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Quantity Discounts
1-3$74.450
4-11$67.010
12+$55.840
(image for) OSK™ SAE Boss O-Ring Seal Kit - 250 Piece Fluorocarbon FKM 90 Duro K250X12V90-900

OSK™ SAE Boss O-Ring Seal Kit - 250 Piece Fluorocarbon FKM 90 Duro

OSK™ SAE Boss O-Ring Seal Kit The 900 series of dash numbers identifies the 20 sizes of boss seals. Except for size -901, the digits after the 9 identify the nominal tube size in 16ths of an inch. The tube size is its outside diameter (OD). For example, size -903 is intended for use with 3/16-inch tube. The one exception, size -901, is intended for use with 3/32-inch tube. 1/16-inch tube is not common in aircraft use. This Kit contains 250...
 In Stock: 7
$82.230
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Quantity Discounts
1-3$82.230
4-11$74.010
12+$61.680
(image for) OSK™ The Hoser's Combo Kit - Hydraulic BOSS, Flat Face & Flange Seal Kit KCOMBO-HOSER-N90

OSK™ The Hoser's Combo Kit - Hydraulic BOSS, Flat Face & Flange Seal Kit

Built for Professionals. Ready for the Field. Stay Ready, Stay Sealed. This premium kit contains 24 unique O-Ring sizes in 90 Durometer Nitrile (Buna-N), ideal for high-pressure hydraulic BOSS fittings, flat face seals, and flange systems. Whether you're in the shop or out in the field, you'll have the exact seals needed to reduce downtime and keep your equipment running. The Hoser's Combo Kit - Hydraulic BOSS, Flat Face & Flange Seal Kit...
 In Stock: 0
$49.580
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Quantity Discounts
1$49.580
2-9$41.300
10-24$35.110
25+$29.580
Displaying 1 to 9 (of 9 Products)

Featured Products - OSK™ O-Ring Service Kits

(image for) OSK™ Industrial Boss Seal Kit | 212 Piece Hydraulic SAE | Buna-N 90
OSK™ Industrial Boss Seal Kit | 212 Piece Hydraulic SAE | Buna-N 90
$24.950