Coupling Specs

API Casing Couplings – Short Thread (STC)

CasingCouplingCouplingWeight per
API Casing CouplingsSize ODSize ODLengthCouplingPalletizedPalletized
Short Thread(inches)(inches)(inches)(lbs)QuantityWeight
4-1/25.0006.2507.98
5-1/26.0506.75011.54
77.6567.25018.49
7-5/88.5007.50027.11
8-5/89.6257.75035.791284581
9-5/810.6257.75039.751124452

API Casing Couplings – Long Thread (LTC)

CasingCouplingCouplingWeight per
API Casing CouplingsSize ODSize ODLengthCouplingPalletizedPalletized
Long Thread(inches)(inches)(inches)(lbs)QuantityWeight
4-1/25.0007.0009.164484104
5-1/26.0508.00014.152944160
77.6569.00023.871503581
7-5/88.5009.25034.46
8-5/89.62510.00047.77964586
9-5/810.62510.50056.11804489

API Casing Couplings – Buttress Thread (STC)

CasingCouplingCouplingWeight per
API Casing CouplingsSize ODSize ODLengthCouplingPalletizedPalletized
Buttress Thread(inches)(inches)(inches)(lbs)QuantityWeight
4-1/25.0008.87510.12
5-1/26.0509.25014.152453467
77.65610.00023.24
7-5/88.50010.37534.88
8-5/89.62510.62545.99803679
9-5/810.62510.62551.05804084

API Casing Couplings – External Upset End (EUE)

CasingCouplingCouplingWeigh per
API EUE TubingSize ODSize ODThreadsLengthCouplingPalletizedPalletized
Couplings(inches)(inches)per inch(inches)(lbs)QuantityWeight
2-3/83.0638 Round4.8753.4311523951
2-7/83.6688 Round5.2505.308004240
3-1/24.5008 Round5.7509.034484045
45.0008 Round6.00010.63
4-1/25.5638 Round6.25013.33

API Tubing Couplings – Non-Upset End (NUE)

CasingCouplingCouplingWeight per
API Non-UpsetSize ODSize ODThreadsLengthCouplingPalletizedPalletized
Tubing Couplings(inches)(inches)per inch(inches)(lbs)QuantityWeight
2-3/82.87510 Round4.2502.8211523249
2-7/83.50010 Round5.1255.158004120
3-1/24.25010 Round5.6258.174483660
44.7508 Round5.7509.58
4-1/25.2008 Round6.12510.77

Coupling Pipe Grade Identification By Paint Color

GradeColor Coding (Painted Outside)
J-55 or K-55Green
N-80Red with One Green Band
L-80Red with One Brown Band
P-110White