Hose

Torque

Max Value Pressure

Range

Bolt Width/Size

1 1/2”

141.6 lbs

522.1 psi

1.69” to 1.85”

M7

2”

141.6 lbs

435.1 psi

2.17” to 2.32”

M7

3”

265.5 lbs

290.1 psi

3.35” to 3.58”

M8

4”

265.5 lbs

174 psi

4.76” to 5.12”

M8

6”

398.3 lbs

87 psi

6.38” to 6.85”

M10

Abbreviation

System Name

BSPP

British Standard Pipe Parallel

BSPTr

British Standard Pipe Taper

CHT

American Standard Fire Hose Thread

(1” National Hose Thread is Chemical Hose Thread)

GHT

Garden Hose Thread

IPS

Iron Pipe Straight Thread

IPT

Iron Pipe Thread

JIC

Joint Industrial Committee

NH

Or

NST

American Standard Fire Hose

Coupling Thread

(National Hose thread also known as National Standard Thread)

NPT

American Standard Taper Pipe

Thread

(National Pipe Tapered)

NPTF

American Standard taper Pipe

Duel Dryseal Thread (National Pipe Tapered) (Dryseal)

NPSH

American Standard Straight Pipe

for Hose Couplings (National Pipe

Straight Hose)

NPSM

American Standard Straight Mechanical Joints (National Pipe

Straight Mechanical)

SIPT

Straight Iron Pipe Thread

TIPT

Tapered Iron Pipe Thread