Thread Identification Guide Metric Port & JIC Technical

Thread Identification Guide Technical Information

Metric Port & JIC

Adapter Sizing Chart

NPTF, BSPT and BSPP measure 1/4” larger than their actual size. For example, a 1/4” NPTF, BSPT or BSPP will actually measure 1/2” on the O. D. of the threads. JIC, SAE O-ring & Flat Face threads measure as listed below. The first number listed is the size of thread, the second number is the threads per inch.

Size NPTF (Pipe) JIC (37°)

SAE Face Seal

BSPP

BSPT

(O-Ring) (Flat Face) (Parallel) (Tapered)

-2

1/8 - 27

5/16 - 24 5/16 - 24

-

1/8 - 28 1/8 - 28

-3

-

3/8 - 24 3/8 - 24

-

-

-

-4

1/4 - 18

7/16 - 20 7/16 - 20 9/16 - 18 1/4 - 19 1/4 - 19

-5

-

1/2 - 20 1/2 - 20

-

-

-

-6

3/8 - 18

9/16 - 18 9/16 - 18 11/16 - 16 3/8 - 19 3/8 -19

-8

1/2 - 14

3/4 - 16 3/4 - 16 13/16 - 16 1/2 - 14 1/2 - 14

-10

-

7/8 - 14 7/8 - 14

1 - 14

-

-

-12

3/4 - 14 1-1/16 - 12 1-1/16 - 12 1 3/16 - 12 3/4 - 14 3/4 - 14

-14

-

1-3/16 - 12 1-3/16 - 12 1 5/16 - 12

-

-

-16 1 - 11-1/2 1-5/16 - 12 1-5/16 - 12 1 7/16 - 12 1 - 11

1 - 11

-20 1-1/4 - 11-1/2 1-5/8 - 12 1-5/8 - 12 1 11/16 - 12 1-1/4 - 11 1-1/4 - 11

-24 1-1/2 - 11-1/2 1-7/8 - 12 1-7/8 - 12

2 - 12

1-1/2 - 11 1-1/2 - 11

-32 2 - 11-1/2 2-1/2 - 12 2-1/2 - 12 2 1/2 - 12 2 - 11

2 - 11

Thread Sizing Kit
Allows the user to properly identify threads of all hydraulic types. This handy kit includes a fractional thread pitch gauge, a metric thread pitch gauge, inside & outside caliper (inches and millimeters), a seat angle gauge (24 degree/30 degree/37 degree/45 degree), 27-page fluid ports & connections identification guid. A carrying case is standard for easy and convenient storage.

Stock Number 1706410

Ship Wt. 1

Flat Face Port with Metric Threads (ISO 9974-1, DIN 3852 Part 1)
This connection is similar to ISO 1179-1 except the threads are metric. Parallel threads seal utilizing various sealing methods such as rings, washers, o-rings, bonded seals or metal to metal seals. The female port has a machined spotface or flat surface which the male seals against.

Backup Washer Retaining Ring O-Ring
Thread O.D.

Seal Ring
Thread O.D.

Retaining Ring O-Ring
Thread O.D.

Male Half O-Ring Adjustable
Seal Type “H”

Male Half Seal Ring Type “E”

Male Half O-Ring Seal
Type “G”

Bonded Seal
Thread O.D.

Cutting Face
Thread O.D.

Spotface
Thread I.D.

Metric Thread Size M8 X 1.0 M10 X 1.0 M12 X 1.5 M14 X 1.5 M16 X 1.5 M18 X 1.5 M20 X 1.5 M22 X 1.5 M24 X 1.5 M26 X 1.5 M27 X 2.0 M33 X 2.0 M36 X 2.0 M42 X 2.0 M45 X 2.0 M48 X 2.0

Male Thread O.D. 8 mm 10 mm 12 mm 14 mm 16 mm 18 mm 20 mm 22 mm 24 mm 26 mm 27 mm 33 mm 36 mm 42 mm 45 mm 48 mm

Female Thread I.D. 7 mm 9 mm 10.5 mm 12.5 mm 14.5 mm 16.5 mm 18.5 mm 20.5 mm 22.5 mm 24.5 mm 25 mm 31 mm 34 mm 40 mm 43 mm 46 mm

Male Half Bonded Seal Washer

Male Half Cutting Face Seal Type “B”

Female Half

NPTF (National Pipe Thread Fuel)
Commonly referred to as “pipe” theads, this connection is still widely used in fluid power systems, even though it is not recommended by the National Fluid Power Association (NFPA) for use in hydraulic applications. The thread is tapered and the seal takes place by deformation of the threads. NPTF threads differ from NPT threads in that NPT threads are designed for mechanical or low-pressure air or fluid applications. Visually, the two look identical. However, the thread forms are different. Mating a NPT threads with NPTF threads will most likely produce a connection what will leak. All of our hydraulic fittings and adapters are NPTF threads. A thread sealant is recommended for all NPTF fittings and adapters.

Tapered
Thread O.D.

Thread I.D.

Male Half

Female Half

NPTF Thread Measuring Tip: Measure the thread diameter and subtract one quarter inch to find the nominal thread size.

Inch Size 1/8 1/4 3/8 1/2 3/4 1 1 1/4 1 1/2 2

Dash Size 02 04 06 08 12 16 20 24 32

Nominal Thread Size 1/8 - 27 1/4 - 18 3/8 - 18 1/2 - 14 3/4 -14 1 - 11 1/2 1 1/4 - 11 1/2 1 1/2 - 11 1/2 2 - 11 1/2

Male Thread O.D. 12/32 (0.41) 17/32 (0.54) 11/16 (0.68) 27/32 (0.84) 1 1/16 (1.05) 1 5/16 (1.32) 1 21⁄32 (1.66) 1 29⁄32 (1.90) 2 3/8 (2.38)

Female Thread I.D. 3/8 (0.38) 1/2 (0.49) 5/8 (0.63) 25/32 (0.77) 1 (0.98) 1 1/4 (1.24) 1 19⁄32 (1.58) 1 13⁄16 (1.82) 2 5⁄16 (2.30)

3727 Westgate Rd. • Grand Island, NE 68803 • Phone: 800-323-5749 • Fax: 308-382-0253