Crossover Subs

We specialize in manufacture and supply of Crossover Subs has two main applications. They can be used to cross over from one connection size to another, or as a disposable part used to prolong the life of more expensive drill stem components. We deal in Crossover Subs utilizing 4140 Q&T Alloy Bar; the heat treatment allows us to maintain a 28-32 Rockwell Hardness. The threaded connections are also protected by a durable phosphate surface coating that helps reduce galling during the initial make-up. All of the Crossover Subs are manufactured to conform to API specifications. The offered Crossover Snub products are provided with BOX x PIN, BOX x BOX or PIN x PIN connections.
API Reg PIN x API Reg BOX :

• 2 3/8” PIN X 2 3/8” BOX (Overall Length 230mm)
• 2 3/8” PIN X 2 3/8” BOX (Overall Length 430mm)
• 2 3/8” PIN X 3 1/2” BOX (Overall Length 260mm)
• 2 7/8” PIN X 2 3/8” BOX (Overall Length 230mm)
• 3 1/2” PIN X 2 3/8” BOX (Overall Length 260mm)
• 3 1/2” PIN X 2 7/8” BOX (Overall Length 305mm)
• 3 1/2” PIN X 3 1/2” BOX (Overall Length 280mm)
• 3 1/2” PIN X 3 1/2” BOX (Overall Length 540mm)
• 3 1/2” PIN X 4 1/2” BOX (Overall Length 300mm)
• 4 1/2” PIN X 3 1/2” BOX (Overall Length 300mm)
• 4 1/2” PIN X 4 1/2” BOX (Overall Length 300mm)
• 6 5/8” PIN X 4 1/2” BOX (Overall Length 300mm)
• 2 7/8” PIN X Short thread 2 3/8” BOX (Overall Length 230mm)

API Reg PIN x API Reg PIN :

• 2 3/8” PIN X 2 3/8” PIN (Overall Length 280mm)
• 2 3/8” PIN X 2 3/8” PIN (Overall Length 430mm)
• 2 3/8” PIN X 3 1/2” PIN (Overall Length 280mm)
• 2 3/8” PIN X 3 1/2” PIN (Overall Length 430mm)
• 3 1/2” PIN X 3 1/2” PIN (Overall Length 280mm)
• 3 1/2” PIN X 3 1/2” PIN (Overall Length 430mm)
• 3 1/2” PIN X 2 3/8” PIN (Overall Length 300mm)
• 4 1/2” PIN X 4 1/2” PIN (Overall Length 280mm)

API Reg BOX x API Reg BOX :

• 2 3/8” BOX x 2 3/8” BOX (Overall Length 280mm)
• 2 3/8” BOX x 2 7/8” BOX (Overall Length 240mm)
• 2 7/8” BOX x 3 1/2” BOX (Overall Length 240mm)
• 3 1/2" BOX x 2 3/8” BOX (Overall Length 260mm)
• 3 1/2” BOX x 3 1/2" BOX (Overall Length 280mm)
• 3 1/2" BOX x 4 1/2” BOX (Overall Length 300mm)
• 4 1/2” BOX x 4 1/2” BOX (Overall Length 230mm)
• 6 5/8” BOX x 3 1/2” BOX (Overall Length 300mm)
• 6 5/8” BOX x 4 1/2” BOX (Overall Length 300mm)
• 6 5/8” BOX x 6 5/8” BOX (Overall Length 300mm)