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Eaton Weatherhead Training
Hose & Thread Identification
Series
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Eaton Weatherhead Hydraulics Training Series
Module
1
Module
2
Module
3
Weatherhead Hose & Thread ID
How to Crimp Weatherhead Hoses & Fittings
Weatherhead Product & Applications
Welcome to the Eaton Weatherhead series of Hydraulic Product Training
focusing on key topics to assist you in servicing your hydraulics customer
base.
Eaton’s Hydraulic Group is a worldwide leader in the design, manufacture
and marketing of a comprehensive line of reliable, high-efficiency,
hydraulic systems and components.
Weatherhead has one of the industry’s broadest offerings of hose and
fittings that are widely used through out multiple market applications.
Click Next >> to continue.
Eaton Weatherhead Training Series
Hose & Thread
Identification
Hydraulic hose assemblies come in a wide variety of lengths, sizes, and end fitting
configurations.
In this module, you will learn why hose and fitting identification is so important
when building hydraulic hose assemblies. These assemblies often have high
pressure, high temperature fluids flowing through them. Attention to product
specifications is critical to everyone’s safety.
Accurate identification of ports and connectors in fluid systems is necessary
before the correct hose assembly can be selected. Be confident that the
replacement provided to your customer is the right one, the first time.
Click Next >> to continue.
Eaton Weatherhead Training Series
Hose & Thread
Identification
These training topics are designed to provide a meaningful
understanding of hose and fitting identification with a focus on the
most frequently seen assemblies in the marketplace.
•
•
•
•
•
•
•
Port and connector basics
Dimensions cross reference review
Common measurement tools
Hydraulic hose types
Common connector styles
Measuring threads for various connector styles
Using thread identification charts to lookup connector types
Eaton Weatherhead Training Series
Hose & Thread
Identification
The purpose of a hydraulic system is to transfer hydraulic pressure in order to
perform a mechanical operation like extending a cylinder. This training will focus
on the hose assembly. Typically the hose assembly is the most commonly
replaced item in the hydraulic system because of its constant flexing and exposure
to harsh environments.
PUMP
PORT
HOSE
ADAPTER
ASSEMBLY
HOSE END
COMPONENT
Eaton Weatherhead Training Series
Hose & Thread
Identification
Handy cross reference table
Size
Fraction
Decimal
-04
1/4”
.250
-05
5/16”
.312
-06
3/8”
.375
-08
1/2”
.500
-10
5/8”
.625
-12
3/4”
.750
-16
1”
1.000
-20
1-1/4”
1.250
-24
1-1/2”
1.500
-32
2”
2.000
Eaton Weatherhead Training Series
Hose & Thread
Identification
Having the proper tools on hand, is a key contributor to successful thread identification.
The FT1341 is a thread measuring tool kit, which also includes a booklet of charts
and information about numerous types of connections.
There are three measuring tools recommended to quickly
measure a connector in hand:
1. A thread pitch gauge
Thread pitch gauge
Reference
Guide
2. A seat angle gauge
3. An I.D/O.D caliper
2 in 1 seat angle/caliper tool
Use the reference guide to quickly convert
your measurements into a part number
Click Next >> to continue.
Eaton Weatherhead Training Series
Hose & Thread Identification
A thread pitch gauge is used to
measure two types of threads:
1) Non metric: Number of threads per
inch for non-metric connectors
2) Metric: Distance between threads
for metric connectors
Thread pitch gauge
A seat angle gauge is used to
measure the sealing surface of both
male and female connectors.
The caliper is used to measure the
thread diameter
2 in 1 seat angle & caliper tool
Higher res images here
Click Next >> to continue.
Eaton Weatherhead Training Series
Hose & Thread Identification
You will also use a series of reference charts to determine which connectors to
consider. These charts will be reviewed in more detail later in the course.
Reference charts used for connector selection focus on the following characteristics:
• Thread diameter
• Thread pitch
• Seating angle
Click Next >> to continue.
Eaton Weatherhead Training Series
Hose & Thread Identification
Question 1
A thread pitch gauge is used to measure
of threads:
which two types
Select the best answer, then click Submit.
 A. Number of threads per inch for non metric connectors
 B. Distance between threads for metric connectors
 C. All of the above
Submit
Eaton Weatherhead Training Series
Hose & Thread Identification
Hose failures are often due to age, improper use, poor assembly, or poor installation. Proper
hose identification is the first step in the replacement process.
Start by inspecting the hose for a layline. A layline may contain the following information:
- Manufacturer
- Hose name
- Part number
Manufacturer/
- Hose pressure rating
Brand
Hose Name
- Hose I.D. (inner diameter)
- Industry standard number
Part
Number
Hose
I.D
Industry
Standard
Number
Another key piece of information is the application, be sure to ask how or where
the hose assembly was used, and on what type of equipment it was used on.
Click Next >> to continue.
Eaton Weatherhead Training Series
Hose & Thread Identification
If a layline isn’t visible, an inspection of the hose construction may offer some clues.
Hoses may have a braided, or spiral construction with different exterior cover styles
depending on the application.
Braided hose can have 1 or 2 layers
- Braids can be fiber, steel or combination of both
Spiral hose can have 4 or 6 layers
- Spiral plies are usually steel
Rubber hose is typically a single fiber braid
Click Next >> to continue.
Eaton Weatherhead Training Series
Hose & Thread Identification
Question 2
Multiple Choice: Check the box if the identifier listed is on the layline example below:






Manufacturer/Brand
Hose name
Part number
Hose pressure rating
Hose I.D. (inner diameter)
Industry standard number
Click Next >> to continue.
Eaton Weatherhead Training Series
Hose & Thread Identification
Question 3
A customer brings in a broken hose assembly. What steps should you take to identify the
hose type?
Select the best answer, then click Submit.
 A. Inspect the hose for a layline identifier such as manufacturer, or hose specifications
 B. Ask the customer what application the hose assembly was used on
 C. Inspect a cross section of the hose for a spiral or braided pattern
 D. All of the above
Submit
Eaton Weatherhead Training Series
Hose & Thread Identification
Now that you’ve reviewed hose identification, let’s now learn how to determine
what connection to use on each end of the replacement assembly.
Selecting the right connector starts by knowing what types of connectors to look
for.
Here is a list of popular connector types: (click on each for more detail)
NPTF: National Pipe Tapered Fuel (LINK TO SLIDE 23)
JIC: SAE J514 37 Deg Flare (LINK TO SLIDE 20)
ORFS: O Ring Face Seal SAE J1453 (LINK TO SLIDE 21)
Flange:
BSP: British Standard Pipe (BSPP Parallel & BSPT Taper) (LINK TO SLIDE 19)
JIS:
Metric/Komatsu: DIN 3902 & Komatsu (LINK TO SLIDE 22)
Eaton Weatherhead Training Series
Hose & Thread Identification
British Standard Pipe Parallel
British Standard Pipe Tapered
•
• The BSPT male thread has tapered
threads and a 30° inverted seat. The seal
takes place by thread distortion.
•
Parallel (straight) thread with a
constant diameter
- The BSPP thread is parallel and the
male has a 30° flare seat which seals
with a BSPP female on its 30° cone
seat. The threads hold the connection
mechanically
The BSPP is similar to NPSM
connections with exception of the
thread pitch, which that is different in
most sizes.
• The BSPT male mates with a BSPT
Female usually found as a port connection.
• The BSPT is similar to but not
interchangeable with NPTF. The thread
pitch is different in most sizes and the
thread angle is 55° degrees.
Eaton Weatherhead Training Series
Hose & Thread Identification
JIC: SAE J514 37 Deg Flare
This connection is very common in fluid power systems. Both the male and
female connections have 37 degree seats. The seal takes place by establishing
a line of contact between the male flare and the female cone seat. The threads
hold the connection mechanically.
(Insert Image)
Eaton Weatherhead Training Series
Hose & Thread Identification
ORFS: O Ring Face Seal SAE J1453
This connection offers the very best leakage control available today. The seal
takes place by compressing the O-Ring onto the flat face of the female. The
threads hold the connection mechanically.
(Insert Image)
Eaton Weatherhead Training Series
Hose & Thread Identification
Metric: DIN 3902 Series
This connection style consists of a common male and three different female
halves.
The male has several features:
1) a straight metric thread
2) a 24 degree included angle
3) a recessed counterbore that matches the tube O.D.
The female has several configurations:
1) a tube, nut and ferrule
2) a tapered nose/globeseal
3) a tapered nose/globeseal with an o-ring
Eaton Weatherhead Training Series
Hose & Thread Identification
NPTF: National Pipe Tapered Fuel
This connection is a tapered thread connector. The seal takes place by
deformation of the threads. Thread crests are crushed into mating thread root
causing a full metal to metal contact.
While it is still used in fluid power, its not recommended as the best option.
Eaton Weatherhead Training Series
Hose & Thread Identification
A recommended part to use for this section to use as an example would be a straight adapter -06 Male
Pipe x -06 Male JIC.
-06 JIC
-06 Male Pipe
Step 1 Measure the thread pitch
• Holding the fitting straight, place the thread pitch gauge on the
threads until the fit is snug.
• Determine the number of threads per inch or the distance
between threads in metric connections.
Step 2 Measure the thread I.D or O.D
• Using the caliper, measure the O.D. of the male thread or the
I.D. of the female thread.
Step 3 Measure the angle of seal
• Using the tip of the caliper, or a seat angle, measure the
angle of the sealing surface (37° & 45° are most popular)
• If angle is a 12 or 24 degree sealing surface, an additional
measurement called the ‘r’ dimension is required *
Step 4
• Refer to the proper reference chart found in your Eaton
Weatherhead Master Catalog to look up the numbers
measured using steps 1 -3
-06 JIC should
read 18 threads
per inch
-06 JIC should
read 9/16” OD
-06 JIC should be the
37 degree angle
Click Next >> to continue.
Eaton Weatherhead Training Series
Hose & Thread Identification
Exercise: Component identification with measurement tools
Let’s work through an identification example:
Using a thread pitch gauge, let’s measure the threads per inch
Result: 20
Using the calipers, measure the outside diameter
Result: 7/16”
This fitting measures 7/16”- 20
Measure the angle of the sealing face
Result: 37° degree
Click Here for Reference Chart (LINK TO SLIDE 26)
Eaton Weatherhead Training Series
Hose & Thread Identification
Find the size for 7/16-20 37°on the chart below:
The fitting we measured together is a 37 degree flare requiring a ¼” tube O.D.
Click Next >> to continue.
Eaton Weatherhead Training Series
Hose & Thread Identification
Question 4
What are the three recommended tools used when identifying threads?
Select all that apply, then click Submit.
 A. Thread Gauge
 B. I.D/O.D Caliper Gauge
 C. Temperature Gauge
 D. Seat Angle Gauge
Submit
Eaton Weatherhead Training Series
Hose & Thread Identification
Question 5
You’ve just finished measuring the threads of a fitting found on a broken hose assembly
brought into your shop. What should you do next?
Select the best answer, then click Submit.
 A. Determine if the fitting is US or Metric
 B. Refer to the Eaton Weatherhead Hose Assembly Master Catalog for fitting reference
charts
 C. All of the above
Submit
Eaton Weatherhead Training Series
Hose & Thread Identification
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