API 3/4" FS Class SM sucker rod couplings
Product Description
1)Type: SM FS and SH sucker rod coupling
2)Coupling diameter: 5/8 ",3/4",7/8",1",1-1/8"
3)Weight: 0.41-1.29 KG/Pcs
4)Material: AISI 5140 or AISI 4140
5)Spray Material:Ni60A Alloy Coating
6)SM Thickness:0.01-0.02in
7) Basic Hardness: HRC 16-23
8)Surface Hardness: HRC 55-62
9)Hole rate: <2%
10)Min. Hardness of the layer:595HV0.2
11) Operating Temperature: -1000~400℃
12) Life:> 180 days
13)Standard: API Spec 11B
14)Package: wooden case
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