JIC 37° Flare Fitting
The JIC 37° flare male will mate with a JIC female only.
The JIC male has straight threads and wa 37° flare seat. The JIC female has
straight threads and a 37° flare seat. The Seal is made on the 37° flare seat.
Some sizes have the same threads as the SAE 45° flare.
Carefully measure the seat angle to differentiate
Dash
Size
-2
-3
-4
-5
-6
-8
-10
-12
-14
-16
-20
-24
-32
Female Threads Male Threads
Nominal No. Threads
Thread
Thread
Size Per Inch
I.D. (Inc.)
O.D. (Inc.)
1/8"
17/64"
5/16"
24
3/16"
21/64"
3/8"
24
1/4"
25
7
20
/64"
/16"
5/16"
29/64"
1/2"
20
3/8"
1/2"
9/16"
18
1/2"
11/16"
3/4"
16
5/8"
13
7/8"
14
/16"
3/4"
31/32"
12
11/16"
7/8"
12
17/64"
13/16"
1"
12
115/64"
15/16"
11/4"
12
135/64"
15/8"
11/2"
12
151/64"
17/8"
2"
12
227/64"
21/2"
SAE 45° Flare Fitting
The SAE 45° flare male will mate with an SAE 45° flare female only.
The SAE male has straight threads and a 45° flare seat. The SAE female has
straight threads and a 45° flare seat. The Seal is made on the 45° flare seat.
Some sizes have the same threads as the SAE 37° flare.
Carefully measure the seat angle to differentiate
Dash
Size
-2
-3
-4
-5
-6
-7
-8
-10
-12
-14
-16
Female Threads Male Threads
Nominal No. Threads
Thread
Thread
Size (In.) Per Inch
I.D. (Inc.)
O.D. (Inc.)
1/8"
17/64"
5/16"
24
3/16"
21/64"
3/8"
24
1/4"
25/64"
7/16"
20
5/16"
29/64"
1/2"
20
3/8"
9/16"
5/8"
18
7/16"
5/8"
11/16"
16
1/2"
11/16"
3/4"
16
5/8"
13
7/8"
14
/16"
3/4"
63/64"
14
11/16"
7/8"
12
111/64"
11/4"
1"
12
119/64"
13/8"
JIC 37° Flare
Thread
O.D.
Thread
I.D.
37°
37°
JIC 37° Male
JIC 37° Flare Female
SAE 45° Flare
JIC 37° Flare
Thread
O.D.
Thread
O.D.
45°
SAE 45° Flare37°Male
JIC 37° Male
Thread
I.D.
Thread
I.D. 45°
SAE 37°
45° Flare Female
JIC 37° Flare Female
SAE 45° Flare
Thread
O.D.
45°
SAE 45° Flare Male
Thread
I.D.
45°
SAE 45° Flare Female
Special Power Steering Thread End
Tube
Size
3/8"
Female Thread
Nominal No. Threads
Thread
Size (In.) Per Inch
I.D. (In.)
11/16"
5/8"
18
Male Thread
Thread
O.D. (In.)
11/16"
P.O Box 1044 • Dayton OH 45401-1044W • Phone: 937/277-9364 / FAX: 937/277-6516 www.lenzinc.com
TB.AD02.708
Flareless Tube Fitting
The flareless solid male will mate with a female flareless nut and
compression sleeve only.
The male has straight threads and a 24° seat. The female has straight
threads and has a compression sleeve for a sealing surface. The seal
is made between the compression sleeve and the 24° seat on the male,
and between the compression sleeve and the tubing on the female.
Tube Nominal No. Female Threads Male Threads
Dash Size
Size Threads
Thread
Thread
Size (In.)
(In.) Per Inch
I.D. (Inc.)
O.D. (Inc.)
5/16"
17/64"
5/16"
-2 1/8"
24
3/8"
21/64"
3/8"
-3 3/16"
24
1
7
25
7
-4
/4"
/16"
20
/64"
/16"
1/2"
29/64"
1/2"
-5 5/16"
20
9/19"
1/2"
9/16"
-6 3/8"
18
3/4"
11/16"
3/4"
-8 1/2"
16
5
7
13
7/8"
-10
/8"
/8"
14
/16"
31/32"
-12 3/4"
11/16"
12
11/16"
-14 7/8"
13/16"
12
17/64"
13/16"
-16 1"
15/16"
12
115/64"
15/16"
-20 1/4"
15/8"
12
135/64"
15/8"
-24 1/2"
17/8"
12
151/64"
17/8"
-32 2"
11/2"
12
227/64"
21/2"
Tubing
Thread
I.D.
Thread
24° O.D.
Compression Sleeve
Solid Male
Female Nut
SAE 45° Inverted Flare Fitting
The SAE 45° inverted flare male will mate with an SAE 42°
inverted flare female only.
The male has straight threads and a 45° inverted flare. The female has
straight threads and a 42° inverted flare. The seal is made on the 45°
flare seat on the male and the 42° flare seat on the female.
Tubing
Female Threads Male Threads
Thread
Dash Nominal
No.
Threads
Thread
Thread
Thread
I.D.
Size Size 24°
(In.)O.D.
Per Inch
I.D. (Inc.)
O.D. (Inc.)
1/8"
9/32"
5/16"
-2
28
3/16"
21/64"
3/8"
-3
24
Compression Sleeve 25
1/4"
7/16"
-4
24
/64"
29/64
1/2"
-5 Male5/16"
20
"
Solid
Female
Nut
3
37
5/8"
-6
/8"
18
/64"
7/16"
5/8"
11/16"
-7
18
1/2"
45/64"
3/4"
-8
18
5/8"
13/16"
7/8"
-10
18
3
-12
/4"
16
1"
11/16"
Thread O.D.
45°
SAE Inverted Flare
Swivel Male
P.O Box 1044 • Dayton OH 45401-1044W • Phone: 937/277-9364 / FAX: 937/277-6516 www.lenzinc.com
Thread I.D.
42°
SAE Inverted Flare
Solid Female
TB.AD03.708
British Standard Pipe (BSP)
BSP Tapered (BSPT)
The BSPT (tapered) male will mate with a BSPT (tapered) female,
or a BSPP (parallel) female.
The BSPT male has tapered threads. When mating with either the
BSPT (tapered) female or the BSPP (parallel) female port, the seal
with made on the threads.
The BSPT connector is similar to, but not interchangeable with, the
NPTF connector. The thread pitch is different in most cases, the
thread angle is 55° instead of the 60° angle found on NPTF threads.
Dash
Size
-2
-4
-6
-8
-10
-12
-16
-20
-24
-32
Female Threads Male Threads
Nominal No. Threads
Thread
Thread
Size Per Inch
I.D. (Inc.)
O.D. (Inc.)
1/8"
3/8"
11/32"
28
1/4"
17/32"
15/32"
19
3/8"
21
19/32"
19
/32"
1/2"
13/16"
3/4"
14
5/8"
29/32"
13/16"
14
3/4"
31/32"
31/32"
14
1
1"
11
1 /32"
17/32"
1/4"
11
111/32"
117/32"
1/2"
11
17/8"
125/32"
2"
11
211/32"
27/32"
55°
Thread Thread
O.D.
I.D.
BSPT Female
BSPT Male
DIN 24° Male & Mating Females
The DIN 24° cone male will mate with any of the
three females shown above.
Thread
O.D.
ale
24
Tube Thread
O.D.
O.D.
12
The male has a 24° seat, straight metric threads,
Thread
and a recessed counterbore which matches the
I.D. O.D. of the coupling used with it. The mating
tube
female is a 24° cone with O-ring, a metric tube
fitting or a universal 24° or 60° cone.
Male
24 Cone, DIN 2353
BSPT Female
There is a light and heavy series DIN coupling.
Proper identification is made by measuring both
the thread size and the tube O.D. (The heavy
series has a smaller tube O.D. than the light, but
has a thicker wall section.)
When measuring the flare angle with the seat
angle gauge, use the 12 gauge. (The seat angle
gauge measures the angle from the connector
centerline).
Thread
I.D.
Female
24 Cone with O-Ring
Thread
I.D.
Tube
O.D.
Female
Metric Tube
P.O Box 1044 • Dayton OH 45401-1044W • Phone: 937/277-9364 / FAX: 937/277-6516 www.lenzinc.com
Thread
I.D.
Female
Universal 24° or 60° Cone
TB.AD04.708
NPT Pipe Thread
The NPTF male with mate with the NPTF, NPSF, or NPSM female.
The NPTF male has tapered threads and a 30° inverted seat. The NPTF
female has tapered threads and no seat. The seal takes place by
deformation of the threads. The NPSM female has straight threads
and a 30° inverted seat. The seal takes place on the 30° seat.
The NPTF connector is similar to, but not interchangeable with, the
BSPT connector. The thread pitch is different in most sizes. Also,
the thread angle is 60° instead of the 55° angle found on BPST threads.
Female Threads Male Threads
Dash Nominal No. Threads
Thread
Thread
Center
Lines Size Center Lines
Size
Per Inch
I.D. (Inc.)
O.D. (Inc.)
1/8"
23/64" At an Angle13/32"
Parelle
-2
27
1/4"
15/32"
35/64"
-4
18
3/8"
19/32"
43/64"
-6
18
1
3
27/32"
-8
/2"
14
/4"
3/4"
61/64"
-12
14
11/16"
-16
1"
111/2"
113/64"
15/16"
Center
-20
11/4"
111/2"
117/32"
143/64"Lines
-24
11/2"
111/2"
125/32"
129Parelle
/32º"
-32
2"
111/2"
21/4"
23/8"
60°
30°
Thread
I.D. 30°
Thread
O.D.
Thread
O.D.
NPTF Male
NPTF Female
NPSM Female
60°
Center Lines
At an Angle
NPTF
Measuring
Seat Angles
Right
Wrong
When the center line of the seat gauge extends parallel with the projected
longitudinal axis of the coupling, then the angles of the gauge and seat match.
60°
Center Lines
Parelle
37°
Compare the measurements taken to a coupling shown in the following
tables that appear to be similar.
JIC 37° Coupling
Center Lines
At an Angle
30°
Thread
O.D.
Right
Thread
O.D.
Thread
I.D. 30°
Wrong
NPTF Female
NPSM Fema
37°
NPTF Male
JIC 37° Coupling
Right
Wrong
37°
P.O Box 1044 • Dayton OH 45401-1044W • Phone: 937/277-9364 / FAX: 937/277-6516 www.lenzinc.com
TB.AD05.708