Page 501 - Plastic Process Equipment, Inc

THREAD INFORMATION

BSP Threads NPT Metric
Threads Threads
“G” Threads “R” Threads

BSP Parallel (BSPP) BSP Taper (BSPT) NPT Taper Metric Parallel
Examlpe: G1/8 Examlpe: R1/8

BSP Parallel (BSPP) BSP Taper (BSPT) NPT Taper Metric Parallel

BSP Threads (British Standard Pipe)
There are two types of "Pipe" profile threads:

Parallel (BSPP): these threads fit in matching parallel ports. Sealing is provided by
an O-ring gasket or a sealing washer. Threads are designated by a "G" followed by
the size.
Example 1/8 BSP Parallel = G1/8.

Taper (BSPT): these threads fit in matching parallel or taper ports. Sealing is provided
by a sealant on the thread. Threads are designated by a "R" followed by the size.

Example 1/8 BSP Taper = R1/8.

NPT Threads (National Pipe Thread)
This is an American standard taper thread which fits into the matching taper port.
Sealing is provided by a sealant on the thread.

Example: 1/8 NPT thread = 1/8 NPT
Metric Threads
These ISO-profile threads are parallel and are fit into the matching parallel port.
Sealing is provided by an O-ring or a sealing washer. Threads are designated by a
"M" followed by the thread size in millimeters, followed by the thread pitch in
millimeters.

Example 5mm Metric thread with a pitch of 0.8mm = M5x0.8 (or M5).

PLASTIC PROCESS EQUIPMENT, INC. www.ppe.com
e-mail: sales@ppe.com
E 8303 CORPORATE PARK DRIVE W 6385 MONTESSOURI STREET
A MACEDONIA, OHIO 44056 E LAS VEGAS, NEVADA 89113 Toll Free: USA, Canada & Mexico
S 216-367-7000 • FAX: 216-367-7022 S 702-433-6385 • FAX: 702-433-6388 800-362-0706
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