Hydraulic - What thread is it?
WHAT THREAD IS IT?
NOTE: Parts shown are BARE-Co parts - original part numbers are shown for reference only.
Type of Seat on Fitting
Description
Thread
O.D.
(approx)
Threads
per
Inch
Imperial
Threads
Thread
to Order

BSP
Male can be tapered thread BSPT (can seal on thread) or parallel BSPP (female always parallel)

NOTE: female hose swivel fittings will seal on either type with seat

* these
are
different
thread
forms
3/8"
28
1/8" BSP
1/2"
19
¼" BSP
0.653"
19
3/8" BSP
0.820"*
14
½" BSP
1 1/32"
14
¾" BSP
1 5/16"
11
1" BSP

N.P.T.F.
Description as above
Used on U.S. equip

½" N.P.T.F. will jam if mated with BSP.
N.P.T.F. has sharper thread form
1/2"
18
¼" N.P.T.F.
0.660"
18
3/8"" N.P.T.F.
0.827"*
14
½" N.P.T.F.
1.035"
14
¾" N.P.T.F.
1 5/16"
11½
1" N.P.T.F.

JIC

UNF thread with 37° protruding seat on male fitting
½"
20
½" JIC
9/16"
18
9/16" JIC
¾"
16
¾" JIC
7/8"
14
7/8" JIC

UN-O-RING

UNF thread using O-Ring on male thread as seal
½"
20
½" UN-O-RING
9/16"
18
9/16" UN-O-RING
¾"
16
¾" UN-O-RING
7/8"
14
7/8" UN-O-RING
METRIC THREADS
Measure Thread O.D. and pitch (distance between threads) in mm
i.e. Typical FIAT / HESTON thread 16mm x 1.5 pitch
WHAT THREAD IS IT?