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Tube Fittings Specifications

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Fitting Type




   Fitting Type       
   Your choices are...
 
      
 
   Adapter

Adapter C x F - wrot
Courtesy of NIBCO Inc.

 
     A fitting designed to connect different types of hose, tubing, or pipe together.
 
   Bulkhead Fitting

Bulkhead Fitting C x C - cast
Courtesy of NIBCO Inc.

 
     Fitting designed to be mounted in a wall or bulkhead and to allow tube connection on either side of barrier.
 
   Cap

Tube Cap C - cast
Courtesy of NIBCO Inc.

 
     Designed to attach on over the outside of a tube end to dead-end the flow.  Attachment techniques include welding, push-fit, brazing, adhesives, and threads, depending on application and material.
 
   Compression Fitting
 
     A compression fitting tightens down a sleeve or ferrule over a joint to prevent leakage.
 
   Coupling / Connector / Hose Mender

Coupling Pex x Pex - wrot
Courtesy of NIBCO Inc.
Coupling with Rolled Tube Stop - wrot
Courtesy of NIBCO Inc.

 
     Fitting designed to join two pieces of tubing or hose.
 
   Coupling - Flexible
 
     Coupling with some amount of flexibility; does not include true expansion fittings.
 
   Cross / 4-Way

Cross C x C x C x C - cast
Courtesy of NIBCO Inc.

 
     Fitting with four connection ports, typically in the shape of a cross.
 
   Crimp Socket
 
     Sleeve or socket to be crimped over a hose end to attach it to a fitting.
 
   Elbow - 90°

90 degree Elbow - Close Rough C x C - wrot
Courtesy of NIBCO Inc.

 
     Allows for a 90° change in direction, frequently includes a curve or radius.  Elbows are also called "Ells".
 
   Elbow - 45°

45 degree Elbow C x C - wrot
Courtesy of NIBCO Inc.

 
     Elbow configured for a 45° change in direction.
 
   Elbow - Other Angle

DWV 60 degree Elbow C x C - cast
Courtesy of NIBCO Inc.

 
     Any other angle elbow, such as 30° or 60°.
 
   Elbow - Reducing

90 degree Fitting Elbow - Close Rough Ftg x C - wrot
Courtesy of NIBCO Inc.

 
     Joins two pieces of pipe (usually 90°) of different sizes.
 
   Expansion Joint / Coupling
 
     Expansion joints and couplings connect sections of tube and provide allowance for movement due to service load, shock, or thermal cycles.
 
   Ferrule

Ferrule (diagram)
Courtesy of Waukesha Cherry-Burrell

 
     Sleeve-type fitting that slips over two ends to join them; ferrules can be compressible and used as the sealing component of a compression fitting.  They are also used as weldable connection fittings.
 
   Gland
 
     The male component of a tube connection, typically mating with a socket to seal or connect tubing.
 
   Nipple
 
     Common description of a short, straight connector fitting, typically with male threaded ends.
 
   Offset

DWV Offset Closet Fitting Ftg x C - cast
Courtesy of NIBCO Inc.

 
     Fitting between runs of tube that are parallel but not aligned.
 
   Plug

DWV Plug M - cast
Courtesy of NIBCO Inc.

 
     Designed to insert into the end of hose or tubing to dead-end the flow.
 
   Reducer - Concentric

Reducing Coupling C x C - wrot
Courtesy of NIBCO Inc.

 
     Fitting with different size ends to mate hose or tubing of different diameter; concentric reducers join tube sections on the same axis.
 
   Reducer - Eccentric

Eccentric Coupling C x C - cast
Courtesy of NIBCO Inc.
Fitting Tee C x Ftg - wrot
Courtesy of NIBCO Inc.

 
     Fitting with different size ends to mate hose or tubing of different diameter; eccentric reducers join tube sections that are parallel but not aligned.
 
   Return / Trap

DWV P-Trap w/Union Joint and Cleanout C x SJ x Cleanout w_/Plug - cast
Courtesy of NIBCO Inc.
DWV Return Bend C x C - cast
Courtesy of NIBCO Inc.

 
     Most commonly in a 180° "U" shape.  These fittings can be used to reverse tube flow direction or combined as a trap for gas or odors.
 
   Side Outlet - Elbow

DWV 90 degree Elbow w/Side Inlet C x C x C - cast
Courtesy of NIBCO Inc.

 
     Elbow with an additional outlet at the corner perpendicular to the plane of the elbow; total of three outlets.
 
   Side Outlet - Tee
 
     Tee with an additional outlet at the junction perpendicular to the plane of the tee; total of four outlets.
 
   Tee - Equal

Flared Tee Fl x Fl x Fl - cast
Courtesy of NIBCO Inc.
Tee C x C x C - wrot
Courtesy of NIBCO Inc.

 
     Three-port fitting in the shape of a "T".  Standard configuration ("Equal") indicates that the straight-through path (typically called the "run") and the perpendicular section ("branch") all have the same size ports.
 
   Tee - Reducing

Drain Coupling C x C - cast
Courtesy of NIBCO Inc.

 
     Typically, this describes a tee fitting in which the branch port is smaller than the ports of the run; it may also include size reduction from one of the run ports to the other.
 
   Tee - Bullhead
 
     Tee fitting in which the branch port is larger than the run ports.
 
   Union

Union C x C - wrot
Courtesy of NIBCO Inc.

 
     Three-part fitting that connects two pieces of tube and allows for disconnection without cutting.
 
   Wye - Equal

45 degree Y C x C x C - cast
Courtesy of NIBCO Inc.
90 degree Y C x C x C - cast
Courtesy of NIBCO Inc.

 
     Three-port fitting in the general shape of the letter "Y" or in which a branch departs the run at an angle other than 90°.  The designation "Equal" refers to the three outlets being the same size.
 
   Wye - Reducing
 
     Wye for which the branch outlet is smaller than the run outlets.
 
   Other
 
     Any unlisted fitting.
 
   Search Logic:      All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.
   Swivel?
 
     Feature allowing one or more fitting ends to rotate or swivel.
 
   Search Logic:      "Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice.
Fitting Ports




   Configuration:       
   Your choices are...
 
      
 
   All Ports Same Type
 
     All fitting ports are of the same style.

Note: this includes reducers that change in size but have consistent port type, e.g. 1/4" x 1/4" x 3/8" Male NPT Tee.
 
   Multiple Port Type / Adapter

90 degree Union Elbow C x M - cast
Courtesy of NIBCO Inc.

 
     Fitting has ports of different styles, as in male and female threads, different thread types, push-on-to-barb adapter, etc.
 
   Search Logic:      All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.
   Tube Port Type Selection:      Select all required port types - multiple selection returns adapters between selected styles.
   Your choices are...
 
      
 
   NPT Male

DWV Trap Adapter O.D. Tube x M - cast
Courtesy of NIBCO Inc.

 
     One or more male NPT thread ports.
 
   NPT Female

Adapter C x F - cast
Courtesy of NIBCO Inc.

 
     One or more female NPT thread ports.
 
   BSP Male
 
     One or more male BSP thread ports; includes both tapered (BSPT) and straight (BSPP) thread styles.
 
   BSP Female
 
     One or more female BSP thread ports; includes both tapered (BSPT) and straight (BSPP) thread styles.
 
   English Straight Thread Male
 
     One or more male straight threads, such as UNC, UNF or other English thread series.
 
   English Straight Thread Female
 
     One or more female straight threads, such as UNC, UNF or other English thread series.
 
   Metric Thread Male
 
     One or more male straight threads; includes pipe and straight threads.
 
   Metric Thread Female
 
     One or more female straight threads; includes pipe and straight threads.
 
   Barb / Rib

Barb
Courtesy of NIBCO Inc.

 
     Fitting end has barbs or ridges; includes both single and multiple barb types.  Some configurations may be for manually pushing on over the barb, or sometimes for use with a clamp over the tube or hose end.
 
   Compression Fitting
 
     Connects to mating tubing or hose with a compression fitting, typically involving a compression nut and ferrule.
 
   Face Seal
 
     Face seals typically incorporate o-rings that mate against the face of the opposite connector to form a seal.  Depending on the standard, the o-ring may be on the nose of the male threaded connector, or behind the male thread on the face of the backing nut.
 
   Flange

Companion Flange C - cast
Courtesy of NIBCO Inc.

 
     One or more flange-mount ports.
 
   Flare
 
     Flares are typically designed to mate with a connection nut or ferrule with complementary geometry.
 
   Push-to-Connect
 
     Fitting end designed to accept the tubing by pushing it into the end; typically disconnects via some type of collar retraction.
 
   Weld / Braze
 
     For rigid metallic connections; tubing or pipe mates with fitting end and is welded or brazed to secure.
 
   Other
 
     Any unlisted fitting connection.
 
   Search Logic:      All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.
Tube Size




   Fitting Size Specification:       
   Your choices are...
 
      
 
   Inside Diameter
 
     Fitting size is specified to match inside diameter of connecting line.
 
   Outside Diameter
 
     Fitting size is specified to match outside diameter of connecting line.
 
   Search Logic:      All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.
   English / Fractional Size Selection:       
   Your choices are...
 
      
 
   All English Sizes
 
     Units are inches or fractions of an inch.
 
   1/16"
 
      
 
   3/32"
 
      
 
   1/8"
 
      
 
   3/16"
 
      
 
   1/4"
 
      
 
   5/16"
 
      
 
   3/8"
 
      
 
   1/2"
 
      
 
   5/8"
 
      
 
   3/4"
 
      
 
   7/8"
 
      
 
   1"
 
      
 
   1 1/4"
 
      
 
   1 1/2"
 
      
 
   2"
 
      
 
   2 1/2"
 
      
 
   3"
 
      
 
   3 1/2"
 
      
 
   4"
 
      
 
   5"
 
      
 
   6"
 
      
 
   8"
 
      
 
   10"
 
      
 
   12"
 
      
 
   Other Size <12"
 
      
 
   Other Size >12"
 
      
 
   Search Logic:      Products with the selected attribute will be returned as matches. Leaving or selecting "No Preference" will not limit the search criteria for this question; products with all attribute options will be returned as matches.
   Metric Size Selection:       
   Your choices are...
 
      
 
   All Metric Sizes
 
     Units such as millimeters or centimeters.
 
   1 mm
 
      
 
   2 mm
 
      
 
   3 mm
 
      
 
   4 mm
 
      
 
   5 mm
 
      
 
   6 mm
 
      
 
   8 mm
 
      
 
   10 mm
 
      
 
   12 mm
 
      
 
   14 mm
 
      
 
   15 mm
 
      
 
   16 mm
 
      
 
   18 mm
 
      
 
   20 mm
 
      
 
   22 mm
 
      
 
   25 mm
 
      
 
   28 mm
 
      
 
   30 mm
 
      
 
   32 mm
 
      
 
   35 mm
 
      
 
   38 mm
 
      
 
   42 mm
 
      
 
   Other Size <42 mm
 
      
 
   Other Size >42 mm
 
      
 
   Search Logic:      Products with the selected attribute will be returned as matches. Leaving or selecting "No Preference" will not limit the search criteria for this question; products with all attribute options will be returned as matches.
Material




   Material       
   Your choices are...
 
      
 
   Aluminum
 
     A bluish silver-white malleable ductile light trivalent metallic element that has good electrical and thermal conductivity, high reflectivity, and resistance to oxidation.
 
   Brass
 
     Brass is an alloy of copper and zinc often with additional elements such as lead or tin; it is characterized by good strength, excellent high temperature ductility and reasonable cold ductility, good conductivity, excellent corrosion resistance, good bearing properties and low magnetic permeability.
 
   Bronze
 
     Bronze is an alloy of copper with other elements such as aluminum, silicon or tin (aluminum bronze, silicon bronze, tin bronze, etc.)
 
   Copper
 
     A common reddish metallic element that is ductile and malleable and is one of the best conductors of heat and electricity; copper tube and fittings are frequently used in plumbing applications.
 
   Steel - Carbon & Alloy
 
     Generic classification for general purpose carbon steel, mild steel or steel alloys containing additions of chrome, nickel, molybdenum, vanadium or other elements to alter hardenability characteristics, toughness, hardness, corrosion resistance, and/or strength. "Black pipe" is typically made of carbon steel.
 
   Steel - Stainless
 
     Stainless steel is chemical and corrosion resistant and can have relatively high pressure ratings; this selection includes all grades of stainless steel.
 
   Thermoplastic
 
     Includes all grades of thermoplastic materials, such as ABS, nylon, fluoropolymers, etc.
 
   Other
 
     Any unlisted, proprietary or specialized material.
 
   Search Logic:      All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.
Options & Features




   Specialty Fittings:       
   Your choices are...
 
      
 
   Chromatography Fitting
 
     Designed and rated for use with High Performance Liquid Chromatography (HPLC) or Gas Chromatography (GC) systems.
 
   Snubber Fitting
 
     Tube fitting with some provision for pressure shock absorption or dampening; these are used in applications such as connection gauges or other instrumentation to pressure or process lines.
 
   Vacuum Fitting
 
     Designed and rated for use in vacuum service.
 
   Biomedical / Pharmaceutical Fitting
 
     Specifically designed for used with drugs and/or medical fluids.
 
   Gas Fitting
 
     Specifically designed for lines of gas such as propane.
 
   Refrigerant Fitting
 
     Designed for use in refrigeration lines and systems.
 
   Pneumatic Fitting
 
     Fitting specifically designed for use in compressed air lines.
 
   Hydraulic Fitting
 
     Fitting designed and rated specifically for hydraulic lines; typical considerations include high pressure ratings.
 
   Air Brake Fitting
 
     Fittings designed for the pneumatic cycling of truck and heavy transportation air brakes.
 
   Search Logic:      All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.
   Sanitary / Food Grade Rated?
 
     Designed and constructed for use with food and beverage applications.
 
   Search Logic:      "Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice.
   Plated?

heavy duty, hinged clamps with electropolished finish
Courtesy of Waukesha Cherry-Burrell

 
     Platings such as nickel and chrome are sometimes used on fittings for appearance or corrosion resistance.
 
   Search Logic:      "Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice.
   Insulated?
 
     Pre-insulated fitting; includes a variety of insulating materials and jacket construction.
 
   Search Logic:      "Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice.
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