How to Identify and Measure Fittings
Pipe size is an industry designation, not the actual size. View information about how to measure threaded and unthreaded pipe and pipe fittings.
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Extreme-Pressure Stainless Steel Threaded Pipe Fittings
With the strength to handle extreme pressures, these fittings can be used to connect equipment in hydraulic fluid lines. 316 stainless steel fittings have excellent corrosion resistance.
NPTF (Dryseal) threads are compatible with NPT threads. UN/UNF (SAE Straight) threads are also known as O-ring boss threads; the male threads have a gasket to prevent leaks.
For technical drawings and 3-D models, click on a part number.
![](/prerenderstable/mvPRE/contents/gfx/imagecache/482/4822t23--6ff9cf758c81626462208-p9@halfx_637620410130437924.png?ver=imagenotfound)
![](/prerenderstable/mvPRE/contents/gfx/imagecache/512/51205k269-@halfx_637620459182141132.png?ver=imagenotfound)
(SAE Straight) Male
Threads with Gasket
- For Use With: See table
- Specifications Met: See table
316 Stainless Steel | |||||||||
---|---|---|---|---|---|---|---|---|---|
Pipe Size (A) | Dash Size (A) | Thread Size (B) | Dash Size (B) | Max. Pressure | Max. Steam Pressure | For Use With | Specifications Met | Each | |
NPTF Male × UN/UNF (SAE Straight) Male | |||||||||
1 1/4 | 20 | 1 5/8"-12 | 20 | 3,000 psi @ 72° F | 3,000 psi @ 200° F | Hydraulic Fluid, Oil, Steam, Water | SAE J514 | 000000000 | 0000000 |
Compact Extreme-Pressure Steel Threaded Pipe Fittings
These fittings are strong enough to handle extreme pressures, yet small enough to fit into cramped spaces. They are galvanized and zinc-plated steel, which have better corrosion resistance than plain steel fittings. UN/UNF (SAE Straight) threads are also known as O-ring boss threads; the male threads have either a gasket or a gasket and washer to prevent leaks.
For technical drawings and 3-D models, click on a part number.
![](/prerenderstable/mvPRE/contents/gfx/imagecache/493/4936k516-@halfx_637685881674029734.png?ver=imagenotfound)
![](/prerenderstable/mvPRE/contents/gfx/imagecache/512/51205k269-@halfx_637589158209650995.png?ver=imagenotfound)
(SAE Straight) Male
Threads with Gasket
- For Use With: See table
- Specifications Met:
NPTF and UN/UNF (SAE Straight): ASTM A108
BSPP: ISO 1179, ISO 8434-6
BSPT: DIN EN 10226-1, ISO 7-1
Thread Size | Dash Size | Max. Pressure | Material | For Use With | Each | |
UN/UNF (SAE Straight) Male | ||||||
---|---|---|---|---|---|---|
1 5/8"-12 | 20 | 4,000 psi @ 72° F | Zinc Plated Steel | Air, Hydraulic Fluid, Water | 000000000 | 000000 |