- Home
-
All Categories
- Automotive
- Camera & Photo Products
- Arts, Crafts & Sewing
- Patio, Lawn & Garden
- Toys & Games
- Kitchen & Dining
- Industrial & Scientific
- Home & Kitchen
- Clothing, Shoes & Jewelry
- Tools & Home Improvement
- Electronics
- Sports & Outdoors
- Office Products
- Musical Instruments
- Video Games
- Computers & Accessories
- Pet Supplies
- Sports Collectibles
- Appliances
- Grocery & Gourmet Food
- Health & Household
- Baby
- Cell Phones & Accessories
- Beauty & Personal Care
- Software
- Payment
- About Us
- FAQ
- Privacy Notice
- Shipping & Returns
- Contact Us
Your cart is empty.
Your cart is empty.- Home /
- Industrial & Scientific
- Fasteners
- Additive Manufacturing Products
- Lab & Scientific Products
- Hydraulics, Pneumatics & Plumbing
- Industrial Hardware
- Food Service Equipment & Supplies
- Raw Materials
- Industrial Electrical
- Adhesives, Sealants & Lubricants
- Professional Medical Supplies
- Janitorial & Sanitation Supplies
- Material Handling Products
- Professional Dental Supplies
- Power Transmission Products
- Packaging & Shipping Supplies
- Test, Measure & Inspect
- Occupational Health & Safety Products
- Science Education
- Retail Store Fixtures & Equipment
- Cutting Tools
- Filtration
- Abrasive & Finishing Products
- Robotics
- Commercial Door Products
- Digital Signage
- Power & Hand Tools
/
- Hydraulics, Pneumatics & Plumbing /
- Hydraulic Equipment /
- Fittings
Product Description

Measuring Your ORB/NPSM Fittings
Female ORB Measurements
To ensure the correct identification/measurement for female ORB threads, ensure that you are measuring the inner diameter (I.D.) of the fitting.
Male ORB Measurements
To ensure the correct identification/measurement for male ORB threads, ensure that you are measuring the outer diameter (O.D.) of the fitting.
Female NPSM Measurements
To ensure the correct identification/measurement for female NPSM threads, ensure that you are measuring the inner diameter (I.D.) of the fitting.
Thread Guide
SAE Straight Thread O-Ring (ORB)
SAE J1926-1 and ISO 11296-1
Conforms to MS16142, UN/UNF Threads
This port connection (sometimes called O-Ring Boss) is recommended for optimum leakage control in medium and high pressure hydraulic systems. The male connector has a straight thread and an O-ring. The female port has a straight thread, a machined surface (minimal spotface) and a chamfer to accept the O-ring. The seal takes place by compressing the O-ring into the chamfer. The threads hold the connection mechanically.
National Pipe Straight Mechanical (NPSM)
The female half has a straight thread and an inverted 30° seat. The male half has a straight thread and a 30° internal chamfer. The 30° seat of the female seals against the chamfer on the male. The threads hold the connection mechanically. A properly chamfered NPTF male will also seal with a NPSM female.

We've Got You Covered.
DiscountHydraulicHose has been providing fittings and adapters for over 50 years. From humble beginnings, we have worked hard to gain the trust and confidence of our customers. Whether you're a weekend warrior, contractor, or shop owner, we'll help you tackle your job with the utmost professionalism and service. Today, we stock tens of thousands of parts ready to ship. We are your go-to source for fittings, adapters, hydraulic hoses, tools, and other accessories.
$9.30 $9.30
$ 4 .99 $4.99
$12.65 $12.65
$ 6 .99 $6.99
$11.96 $11.96
$ 5 .99 $5.99
$69.95 $69.95
$ 33 .99 $33.99
$9.26 $9.26
$ 4 .99 $4.99
$3.78 $3.78
$ 1 .99 $1.99
$12.74 $12.74
$ 6 .99 $6.99