Sucker Rod Coupling & Sub Couplings & Polished Rod Coupling

Product Feature:

API Sucker Rod Coupling, Class SM

1,Material: AISI 5140 (40Cr),

2,Coat Thickeness: 0.01-0.02 in

3,coupling diameter: 5/8 ",3/4",7/8",1",1-1/8"

4,Basic Hardness: HRC 16-23

5,Surface Hardness HRC 55-62

6,thermal spraying coating and extrusion thread


 1) Material: AISI 5140

2) Standard: API Spec 11B

3) Main specification:

OD:1-1/2" (38.10mm)

ID: 15/16"(23.81mm)

Length: 4" (101.6mm)

Weight: 0.56kg

4)Other Size: 3/4 7/8 1 1 1/8 5)Smoothness: 3.1*10-3

6)Coat Thickness(in): 0.01in ~ 0.02in

7)Basic hardness: HRC 16-23

8)Surface Hardness: HRC 55-62

9)Bonding Strength(Mpa): 484

10)Hole rate: <2%

11)Min. Hardness of the layer: 595HV0.2

12)Min. Tensile Strength: 655 Mpa

13)Operating Temperature: -1000~400 Centigrade Temperature

14)Life: > 180 days

15) Package: wooden case, 1000pcs each case.

16) Usage: oil exploration equipment, accessories, oil sucker rod coupling



We are the manufacturer of sucker rod couplings and can supply the high quality

sucker rod couplings in low price with the hope to establish a long-term

relationship with you.

If any of the sucker rod couplings interests you, please contact me for more

information about the sucker rod couplings.


Contact Person: Cathy
Skype: Cathy20059999
Wechat: 37798983
whatsapp:8613839306379