Page 128 - inside front cover

Technical
Dixon Powhatan 2007 11-3 1-800-355-1991
Thread Information
BSPP
BSPTr
CHT
GHT
IPS
IPT
Washer
Washer
Washer
Thread
Washer
Thread
Washer
Washer
Washer
Washer
Washer
System Name Abbreviation Seal
Method Compatibility
NH
or
NST
NPT
NPTF
NPSH
NPSM
SIPT
Male BSPP with Female BSPP
Female BSPP with Male BSPP
Female BSPP with Male BSPTr
British Standard Pipe Parallel
Male BSPTr with Female BSPTr
Male BSPTr with Female BSPP
Female BSPTr with Male BSPTr
Female BSPTr not compatible with Male BSPP
British Standard Pipe Taper
1" Male NH (NST) with 1" Female NH (NST)
1"Female NH (NST) with 1" Male NH (NST)
1" Thread is used on both ¾" hose and 1" hose.
Not compatible with other systems
American Standard Fire Hose
Thread (1" National Hose Thread
is Chemical H ose T hread, also
known as Booster Hose Thread)
Male GHT with Female GHT
Female GHT with Male GHT
Thread is same for all size hose
Not compatible with other systems
Garden H ose T hread
Generic Name for Straight Pipe Thread
See NPSH for compatibility
Iron Pipe Straight Thread
Generic Name for All Pipe Thread
More information required Iron Pipe Thread
American Standard Fire Hose
Coupling Thread
(National Hose thread also known
as National Standard Thread)
Male NPT with Female NPT
Male NPT with Female NPTF
Male NPT with Female NPSM
Male NPT with Female NPSH
Female NPT with Male NPT
Female NPT with Male NPTF
Female NPT not compatible with Male NPSM or
Male NPSH
American Standard Taper Pipe
Thread
(National Pipe Tapered)
Male NPTF with Female NPTF
Male NPTF with Female NPT
Male NPTF with Female NPSM
Male NPTF with Female NPSH
Female NPTF with Male NPTF
Female NPTF with Male NPT
Female NPTF with Male NPSM or NPSH
Note: NPTF with NPTF threads do not require
sealant for the initial use. After that, sealant is
required.
American Standard Taper Pipe
Fuel Dryseal Thread (National
Pipe Tapered Fine)
Male NPSH with Female NPSH
Female NPSH with Male NPSH
Female NPSH with Male NPT
Female NPSH with Male NPTF
Female NPSH with Male NPSM
American Standard Straight Pipe
for Hose Couplings (National Pipe
Straight Hose)
Male NPSM with Female NPSM
Male NPSM with Female NPSH
Female NPSM with Male NPSM
Female NPSM with Male NPT
Female NPSM with Male NPTF
American Standard Straight
Mechanical Joints (N ational Pipe
Straight Mechanical)
Generic name for Straight Pipe Thread Straight Iron Pipe Thread
Washer
Washer
Thread
Thread
Washer
Washer
Thread
Thread
Thread
Thread
Washer
Washer
Thread
Thread
Not Compatible
Washer
Washer
Washer
Washer
Washer
Seal can be either
mechanical or washer.
Mating fittings must be
of same type.
Washer
TIPT Generic name for Tapered Pipe Thread Tapered Iron Pipe Thread Thread
Male NH (NST) with Female NH (NST)
Female NH (NST) with Male NH (NST)
Not compatible with other systems
Thread pitch and diameters of fire threads may
vary according to local and municipal regulations.