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Boss O-Ring Kit

There is 20 standard sizes for O-rings used to seal straight-thread tube fittings on a boss. A boss Tube fitting with boss seal is cylindrical projection on a casting or forging. The end of that projection is machined to provide a flat, smooth surface for sealing. Straight threads used with an O-ring provide a better seal than tapered threads used alone. Although made in a variety of o-ring compounds the most common Boss O-rings are Buna-N in 90 Durometer.




Image Model+ Item Name Stock Price Quantity Discounts
Boss O-ring Kit - SAE 900 - 155 Piece Buna-N 90 K155X8N90-900

Boss O-ring 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...
16
$10.00

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Quantity Discounts
1$10.00
2-9$9.00
10+$7.50
Boss O-ring Kit - SAE 900 - 155 Piece Urethane 90 K155X8U90-900

Boss O-ring Kit - SAE 900 - 155 Piece Urethane 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...
1
$72.00

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Quantity Discounts
1$72.00
2-9$64.80
10+$54.00
OSK™ SAE Boss O-Ring Kit 155 Piece FKM/Viton® 90 Duro K155X8V90-900

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

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...
3
$29.50

Add:

Quantity Discounts
1$29.50
2-9$26.55
10+$22.13
Industrial Boss Seal Kit - 212 Piece Viton 90 K212X20F90

Industrial Boss Seal Kit - 212 Piece Viton 90

Industrial Boss Seal Kit - 212 Piece Viton 90 Use of fluorocarbon rubber is preferred over nitrile when high operating temperatures and/or harsh...
1
$80.00

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Quantity Discounts
1$80.00
2-9$72.00
10+$60.00
Industrial Boss Seal Kit - 212 Piece Buna-N 90 K212X20N90

Industrial Boss Seal Kit - 212 Piece Buna-N 90

Industrial Boss Seal Kit - 212 Piece Buna-N 90 90 durometer nitrile is the most commonly used material in boss seal applications, due to its...
1
$31.95

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Quantity Discounts
1$31.95
2-9$28.76
10+$23.96
Industrial Boss Seal Kit - 212 Piece Buna-N 90 K212X20N90-ORK

Industrial Boss Seal Kit - 212 Piece Buna-N 90

Industrial Boss Seal Kit - 212 Piece Buna-N 90 90 durometer nitrile is the most commonly used material in boss seal applications, due to its...
4
$31.95

Add:

Quantity Discounts
1$31.95
2-9$28.76
10+$23.96
OSK™ SAE Boss O-Ring Seal Kit - 250 Piece EPDM 70 K250X12E70-900

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

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...
2
$25.25

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Quantity Discounts
1$25.25
2-9$22.73
10+$18.94
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 The 900 series of dash numbers identifies the 20 sizes of boss seals. Except for size -901, the digits after the...
4
$19.50

Add:

Quantity Discounts
1$19.50
2-9$17.55
10+$14.63
Boss O-ring Kit - SAE 900 - 250 Piece Buna-N 90 K250X12N90-900

Boss O-ring Kit - SAE 900 - 250 Piece Buna-N 90

OSK™ Boss O-Ring Seal Kit in Buna-N 90 This Kit contains 250 pieces and 12 of the most popular 900 series O-Rings. These Boss Seal O-Rings are...
11
$17.00

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Quantity Discounts
1$17.00
2-9$15.30
10+$12.75
OSK™ SAE Boss O-Ring Seal Kit - 250 Piece Silicone S70 K250X12S70-900

OSK™ SAE Boss O-Ring Seal Kit - 250 Piece Silicone S70

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...
2
$25.25

Add:

Quantity Discounts
1$25.25
2-9$22.73
10+$18.94
OSK™ SAE Boss O-Ring Seal Kit - 250 Piece Urethane 90 K250X12U90-900

OSK™ SAE Boss O-Ring Seal Kit - 250 Piece Urethane 90

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...
1
$70.00

Add:

Quantity Discounts
1$70.00
2-9$63.00
10+$52.50
OSK™ SAE Boss O-Ring Seal Kit - 250 Piece FKM/Viton® 75 K250X12V75-900

OSK™ SAE Boss O-Ring Seal Kit - 250 Piece FKM/Viton® 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...
5
$50.00

Add:

Quantity Discounts
1$50.00
2-9$45.00
10+$37.50
OSK™ SAE Boss O-Ring Seal Kit - 250 Piece FKM/Viton® 90 Duro K250X12V90-900

OSK™ SAE Boss O-Ring Seal Kit - 250 Piece FKM/Viton® 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...
5
$55.00

Add:

Quantity Discounts
1$55.00
2-9$49.50
10+$41.25