ISO 7241-1 Series B does not include 1-1/4 inch body size couplings; therefore, Series 10-HK is not covered by this standard.
Unit of Measure

Specifications

Body Size

N/A 1 1/4 in

Material

N/A Steel

Thread Size (Female)

N/A 1 1/4-11 BSPP

Overall Length (A)

N/A 4.51 in

Maximum Diameter (B)

N/A 2.73 in

Hex

N/A 2.38 in