API Class SM coupling
1ú¬Type: SM FS and SH coupling
2ú¬Coupling diameter: 5/8 ",3/4",7/8",1",1-1/8"
3)Weight: 0.41-1.29 KG/Pcs
4ú¬Material: AISI 5I40
5ú¬Spray Materialú¦Ni60A Alloy Coating
6ú¬SM Thicknessú¦0.01-0.02in
7) Basic Hardness: HRC 16-23
8ú¬Surface Hardness: HRC 55-62
9ú¬Hole rate: ú+2%
10ú¬Min. Hardness of the layer: 595HV0.2
11) Operating Temperature: -1000~400íµ
12) Life: > 180 days
13ú¬Standard: API Spec 11B
14)Package: wooden case
15)Payment Terms: T/T .

Our New Products
1) SM Coupling with great bevel edge
2) Two-way Cambered Protection Coupling
If you have any interest in our sucker rod couplings, please do not hesitate to let we know, and weí»ll supply you with our high quality products and best services.