OSK™ O-Ring Service Kits include 1,415 popular O-Rings packed in a heavy duty box for service trucks, repair shops, maintenance teams, and parts counters. These kits help keep the right O-Ring close by when equipment is down, a fitting is leaking, or a customer needs a fast repair. Each kit includes five internal storage boxes organized by common sealing use: 1/16" cross section, 3/32" cross section, 1/8" cross section, SAE Boss fitting O-Rings, and hydraulic flange fitting O-Rings. This makes it faster to find the size you need without digging through loose parts or placing a small emergency order.
These kits are available in Buna-N 70, Buna-N 90, Viton®/FKM 75, and Viton®/FKM 90 durometer options. Buna-N is a strong choice for many petroleum oils, hydraulic fluids, fuels, grease, and general repair work. Viton®/FKM is used when higher heat, chemical resistance, or tougher sealing conditions are required. The 70 durometer options work well for many standard sealing jobs, while the 90 durometer options provide added hardness for hydraulic fittings where pressure and extrusion resistance matter.
The O-Ring Store LLC makes getting O-Rings easy by putting common sizes, materials, and fitting styles together in one organized service kit. It saves time, reduces downtime, and helps your crew make reliable repairs from the truck, shop, or counter.

