Value Collection H90KBOSS Nbr Boss O-ring Kit 90A 212 Pc

Product Description

The VALUE COLLECTION H90KBOSS is a nitrile butadiene rubber (NBR) boss o-ring kit rated at 90 durometer Shore A, classified as extra hard. The kit contains 212 individual o-rings covering a wide range of dash numbers, making it a practical inventory solution for plumbing, hydraulic, and fluid system service work. Each o-ring features a round cross-section profile suited for boss-style port fittings. NBR compound provides solid resistance to petroleum-based oils, fuels, and hydraulic fluids commonly encountered in trade service environments. Licensed plumbers, pipefitters, and hydraulic technicians are the primary installers for this type of hardware.

This kit is designed for boss-style o-ring face seal and port fitting applications. Dash numbers included span a broad size range, making the kit useful for service trucks and shop benches where multiple fitting sizes are routinely encountered. The 90 Shore A hardness rating makes these o-rings appropriate for higher-pressure connections where a firmer seal material is specified. This kit is not FDA approved and should not be used in potable water or food-contact applications.

Key Features

• 90 durometer Shore A hardness — rated extra hard for demanding pressure applications
• 212-piece assortment covering dash numbers 901 through 932 (selected sizes)
• Round cross-section profile for standard boss-style port fittings
• Nitrile butadiene rubber (NBR) compound resists petroleum oils, fuels, and hydraulic fluids
• Not FDA approved — not intended for food-contact or potable water service
• Single-package quantity for bench stock or service vehicle inventory

Compatibility

Designed for boss-style o-ring port fitting applications requiring a 90 Shore A NBR seal across dash number sizes 901 through 932 (selected dash numbers within that range). Verify dash number and durometer specification against fitting manufacturer requirements before installation.

Installation Notes

Boss o-rings are installed by licensed plumbers, pipefitters, or hydraulic technicians depending on the system type. Before servicing any fitting, depressurize and isolate the line completely. Lubricate the o-ring lightly with a compatible fluid before seating to prevent rolling or tearing during assembly. Do not reuse o-rings removed from service — always install a fresh o-ring when reassembling a boss port fitting.