API FS sucker rod couplings with big chamfer
Product Description
API Class SM sucker rod coupling
The serial sucker rod couplings are made of high quality low carbon alloy steel.The forging quality is strictly by use of the heating patent technology developed independently.
1-Type: SM SH coupling
2-Material: Carbon steel AISI 5I40
3-Spray Material： Ni60A Alloy Coating
4-Basic Hardness: HRC 16-23
5-Surface Hardness: HRC 55-62
6-Hole rate: ＜2%
7-Min. Hardness of the layer: 595HV0.2
8-Standard: API Spec 11B
9-Coupling diameter: 7/8 "
10-Weight: 0.52 KG/Pcs
11-Package: wooden cases
12-Payment Terms:T/T
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