Iron Structural Tubing | McMaster-Carr

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	Material Material

Iron

	Slip-On Framing Component Slip-On Framing Component

	Connector
	Through-Hole Connector
	Rail End
	Through-Hole Rail Support
	Cap
	Add-On Through-Hole Connector
	Through-Hole Reducer
	Panel Hanger
	Stop Collar
	Replacement Set Screws

	System of Measurement System of Measurement

Inch

	Rail OD Rail OD

	Finish Finish

Galvanized

	Slip-On Framing Component Shape Slip-On Framing Component Shape

45° Wye

90° Elbow

Adjustable-Angle Cross

Adjustable-Angle Elbow

Adjustable-Angle Flange

Four-Way Adjustable-
Angle Elbow

	OD OD

	ID ID

	Shape Shape

	Round Tube

	Specifications Met Specifications Met

ASTM A47

ASTM A247

	DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense Acquisition Regulations Supplement)

DFARS Specialty Metals
COTS-Exempt

	Framing Type Framing Type

Slip On

	RoHS (Restriction of Hazardous Substances) RoHS (Restriction of Hazardous Substances)

RoHS Compliant

	REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) REACH (Registration, Evaluation, Authorization and Restriction of Chemicals)

REACH Compliant

	Overall Height Overall Height

	Length Length

	Flange Diameter Flange Diameter

	Flange Shape Flange Shape

	Wall Thickness Wall Thickness

1 1/2"

	Number of Mounting Holes Number of Mounting Holes

	Mounting Hole Diameter Mounting Hole Diameter

	Number of Through Holes Number of Through Holes

	Hardness Rating Hardness Rating

Hard

	Flange Width Flange Width

155 Products

About Carbon Steel, Alloy Steel, Spring Steel, and Cast Iron

Yield Strength: Not Rated
Hardness: Rockwell C20 (Hard)
Heat Treatable: Yes
Max. Hardness After Heat Treatment: Rockwell C50
Specifications Met: ASTM A247

Gray cast iron machines faster with less wear on cutting tools than most types of steel. It also absorbs vibration, so finished parts run quieter than those made of steel. It's often fabricated into gears, pulleys, rollers, and bushings.

For technical drawings and 3-D models, click on a part number.

Certificates with a traceable lot number are available for these products. Download certificates from ORDER HISTORY after your order ships.

				16" Lg.
OD	OD Tolerance	ID	ID Tolerance		Each
1" Wall Thick. (Oversized)
3 1/2"	0.087" to 0.163"	1 1/2"	-0.25" to 0"	0000000	0000000
4"	0.087" to 0.163"	2"	-0.25" to 0"	0000000	000000
4 1/2"	0.092" to 0.188"	2 1/2"	-0.25" to 0"	0000000	000000
5"	0.092" to 0.188"	3"	-0.25" to 0"	0000000	000000
5 1/2"	0.1" to 0.21"	3 1/2"	-0.25" to 0"	0000000	000000
6"	0.1" to 0.21"	4"	-0.25" to 0"	0000000	000000
6 1/2"	0.108" to 0.232"	4 1/2"	-0.25" to 0"	0000000	000000
8"	0.105" to 0.232"	6"	-0.25" to 0"	0000000	000000
9"	0.108" to 0.324"	7"	-0.25" to 0"	0000000	000000
1 1/2" Wall Thick. (Oversized)
6"	0.1" to 0.21"	3"	-0.25" to 0"	0000000	000000
7"	0.108" to 0.232"	4"	-0.25" to 0"	0000000	000000

Galvanized Iron and Steel Slip-On Framing and Fittings

To provide corrosion resistance in wet environments, this framing is galvanized. Slip the fittings over rails to construct custom railings, guard rails, storage racks, and shelving. Tighten the included set screws for a secure hold.

Galvanized iron fittings are malleable iron.

For technical drawings and 3-D models, click on a part number.

Connectors

90° Elbow

Adjustable-Angle Elbow

Straight

Tee

Three-Way 90° Elbow

Adjustable-angle fittings can be positioned at any angle. Tighten the set screw to secure.

90° Elbow
For Rail OD	Lg.	Material	Includes		Each
1"	__	Galvanized Iron	Set Screws	00000000	000000
1 3/8"	__	Galvanized Iron	Set Screws	0000000	00000
1 5/8"	__	Galvanized Iron	Set Screws	0000000	00000
1 7/8"	__	Galvanized Iron	Set Screws	0000000	00000
2 3/8"	__	Galvanized Iron	Set Screws	0000000	00000
Adjustable-Angle Elbow
1 7/8"	__	Galvanized Iron	Set Screws	00000000	00000
Straight
1"	3"	Galvanized Iron	Set Screws	00000000	00000
1 3/8"	3 1/2"	Galvanized Iron	Set Screws	0000000	00000
1 5/8"	4"	Galvanized Iron	Set Screws	0000000	00000
1 7/8"	4"	Galvanized Iron	Set Screws	0000000	00000
2 3/8"	4 7/8"	Galvanized Iron	Set Screws	0000000	00000
Tee
1"	__	Galvanized Iron	Set Screws	00000000	00000
1 3/8"	__	Galvanized Iron	Set Screws	0000000	00000
1 5/8"	__	Galvanized Iron	Set Screws	0000000	00000
1 7/8"	__	Galvanized Iron	Set Screws	0000000	00000
2 3/8"	__	Galvanized Iron	Set Screws	0000000	00000
Three-Way 90° Elbow
1"	__	Galvanized Iron	Set Screws	00000000	00000
1 3/8"	__	Galvanized Iron	Set Screws	0000000	00000
1 5/8"	__	Galvanized Iron	Set Screws	0000000	00000
1 7/8"	__	Galvanized Iron	Set Screws	0000000	00000
2 3/8"	__	Galvanized Iron	Set Screws	00000000	00000

Through-Hole Connectors

Four-Way 90° Elbow

Four-Way Adjustable-Angle Elbow

Tee

Swivel Tee

Cross

Adjustable-Angle Cross

Five-Way Cross

Six-Way Cross

Crossover with Two Through Holes

45° Wye

Adjustable-Angle Wye

Through-hole fittings allow rails to run all the way through.

Adjustable-angle fittings can be positioned at any angle. Tighten the set screw to secure.

Four-Way 90° Elbow
For Rail OD	No. of Through Holes	Material	Includes		Each
1"	1	Galvanized Iron	Set Screws	00000000	000000
1 3/8"	1	Galvanized Iron	Set Screws	0000000	00000
1 5/8"	1	Galvanized Iron	Set Screws	0000000	00000
1 7/8"	1	Galvanized Iron	Set Screws	0000000	00000
2 3/8"	1	Galvanized Iron	Set Screws	0000000	00000
Four-Way Adjustable-Angle Elbow
1"	1	Galvanized Iron	Set Screws	00000000	00000
1 3/8"	1	Galvanized Iron	Set Screws	0000000	00000
1 5/8"	1	Galvanized Iron	Set Screws	0000000	00000
1 7/8"	1	Galvanized Iron	Set Screws	00000000	00000
2 3/8"	1	Galvanized Iron	Set Screws	00000000	00000
Tee
1"	1	Galvanized Iron	Set Screws	00000000	00000
1 3/8"	1	Galvanized Iron	Set Screws	0000000	00000
1 5/8"	1	Galvanized Iron	Set Screws	0000000	00000
1 7/8"	1	Galvanized Iron	Set Screws	0000000	00000
2 3/8"	1	Galvanized Iron	Set Screws	0000000	00000
Swivel Tee
1 3/8"	1	Galvanized Iron	Set Screws	00000000	00000
1 5/8"	1	Galvanized Iron	Set Screws	00000000	00000
1 7/8"	1	Galvanized Iron	Set Screws	00000000	00000
Cross
1"	1	Galvanized Iron	Set Screws	00000000	00000
1 3/8"	1	Galvanized Iron	Set Screws	0000000	00000
1 5/8"	1	Galvanized Iron	Set Screws	0000000	00000
1 7/8"	1	Galvanized Iron	Set Screws	0000000	00000
2 3/8"	1	Galvanized Iron	Set Screws	0000000	00000
Adjustable-Angle Cross
1"	1	Galvanized Iron	Set Screws	00000000	00000
1 3/8"	1	Galvanized Iron	Set Screws	0000000	00000
1 5/8"	1	Galvanized Iron	Set Screws	0000000	00000
1 7/8"	1	Galvanized Iron	Set Screws	0000000	00000
2 3/8"	1	Galvanized Iron	Set Screws	00000000	000000
Five-Way Cross
1"	1	Galvanized Iron	Set Screws	00000000	00000
1 3/8"	1	Galvanized Iron	Set Screws	0000000	00000
1 5/8"	1	Galvanized Iron	Set Screws	0000000	00000
1 7/8"	1	Galvanized Iron	Set Screws	0000000	00000
2 3/8"	1	Galvanized Iron	Set Screws	0000000	00000
Six-Way Cross
1"	1	Galvanized Iron	Set Screws	00000000	00000
1 3/8"	1	Galvanized Iron	Set Screws	00000000	00000
1 5/8"	1	Galvanized Iron	Set Screws	00000000	00000
1 7/8"	1	Galvanized Iron	Set Screws	00000000	00000
2 3/8"	1	Galvanized Iron	Set Screws	00000000	00000
Crossover
1"	2	Galvanized Iron	Set Screws	00000000	00000
1 3/8"	2	Galvanized Iron	Set Screws	0000000	00000
1 5/8"	2	Galvanized Iron	Set Screws	00000000	00000
1 5/8"	2	Galvanized Iron	Set Screws	0000000	00000
1 7/8"	2	Galvanized Iron	Set Screws	0000000	00000
2 3/8"	2	Galvanized Iron	Set Screws	0000000	00000
45° Wye
1"	1	Galvanized Iron	Set Screws	00000000	00000
1 3/8"	1	Galvanized Iron	Set Screws	00000000	00000
1 5/8"	1	Galvanized Iron	Set Screws	00000000	00000
1 7/8"	1	Galvanized Iron	Set Screws	00000000	00000
Adjustable-Angle Wye
1"	1	Galvanized Iron	Set Screws	00000000	00000
1 3/8"	1	Galvanized Iron	Set Screws	0000000	00000
1 5/8"	1	Galvanized Iron	Set Screws	0000000	00000
1 7/8"	1	Galvanized Iron	Set Screws	0000000	00000
2 3/8"	1	Galvanized Iron	Set Screws	0000000	00000

Add-On Through-Hole Connectors

Hinged Crossover

Wraparound Crossover

Hinged Tee

Wraparound Tee

Add-on through-hole fittings can be added to existing structures without disassembling.

				Hinged		Wraparound
For Rail OD	No. of Through Holes	Material	Includes		Each		Each
Crossover
1"	2	Galvanized Iron	Set Screws	000000	00	00000000	000000
1 3/8"	2	Galvanized Iron	Set Screws	000000	00	0000000	00000
1 5/8"	2	Galvanized Iron	Set Screws	00000000	000000	0000000	00000
1 7/8"	2	Galvanized Iron	Set Screws	00000000	00000	0000000	00000
2 3/8"	2	Galvanized Iron	Set Screws	000000	00	0000000	00000
Tee
1"	1	Galvanized Iron	Set Screws	000000	00	00000000	00000
1 3/8"	1	Galvanized Iron	Set Screws	000000	00	0000000	00000
1 5/8"	1	Galvanized Iron	Set Screws	00000000	00000	0000000	00000
1 7/8"	1	Galvanized Iron	Set Screws	00000000	00000	0000000	00000
2 3/8"	1	Galvanized Iron	Set Screws	000000	00	0000000	00000

Through-Hole Reducers

Tee

Crossover

Through-hole fittings allow rails to run all the way through.

Reducers allow transitions from one rail size to another.

For Rail OD
(A)	(B)	No. of Through Holes	Material	Includes		Each
Tee
1 3/8"	1"	1	Galvanized Iron	Set Screws	00000000	000000
1 5/8"	1 3/8"	1	Galvanized Iron	Set Screws	00000000	00000
1 7/8"	1 5/8"	1	Galvanized Iron	Set Screws	00000000	00000
2 3/8"	1 7/8"	1	Galvanized Iron	Set Screws	00000000	00000
Crossover
1 3/8"	1"	2	Galvanized Iron	Set Screws	00000000	00000
1 5/8"	1 3/8"	2	Galvanized Iron	Set Screws	00000000	00000
1 7/8"	1 5/8"	2	Galvanized Iron	Set Screws	00000000	00000
2 3/8"	1 7/8"	2	Galvanized Iron	Set Screws	00000000	00000

Stop Collars

Stop collars keep objects from sliding on the rail.

Straight
For Rail OD	Material	Includes		Each
1"	Galvanized Iron	Set Screws	00000000	00000
1 3/8"	Galvanized Iron	Set Screws	00000000	0000
1 5/8"	Galvanized Iron	Set Screws	00000000	00000
1 7/8"	Galvanized Iron	Set Screws	00000000	00000

Panel Hangers

		Mounting Holes
For Rail OD	Material	No. of	Dia.	Mounting Fasteners Included	Includes		Each
Straight
1"	Galvanized Iron	1	3/8"	No	Set Screws	00000000	000000
1 3/8"	Galvanized Iron	1	3/8"	No	Set Screws	00000000	00000
1 5/8"	Galvanized Iron	1	3/8"	No	Set Screws	00000000	00000
1 7/8"	Galvanized Iron	1	3/8"	No	Set Screws	00000000	00000
2 3/8"	Galvanized Iron	1	3/8"	No	Set Screws	00000000	00000

Caps

Caps protect and cover the ends of rails.

	Galvanized Iron
For Rail OD		Each
1"	00000000	00000
1 3/8"	00000000	0000
1 5/8"	00000000	0000
1 7/8"	00000000	0000
2 3/8"	00000000	00000

Replacement Set Screws

Drive
Style	Size	Material	Pkg. Qty.		Pkg.
Hex	1/4"	Galvanized Iron	10	00000000	000000
Hex	5/16"	Galvanized Iron	10	00000000	00000

Rail Ends

Rectangular Adjustable-Angle

L-Shaped

Oval

Round

Flush

Offset

Rail ends attach to rails on one end and have a flange on the other end to attach to floors, walls, and ceilings.

	Flange					Mounting Holes
For Rail OD	Lg.	Wd.	Dia.	Overall Ht.	Material	No. of	Dia.	Mounting Fasteners Included	Includes		Each
Rectangular Adjustable-Angle
1"	4 3/8"	2"	__	3 3/4"	Galvanized Iron	__	__	__	Set Screws	00000000	000000
1 3/8"	4 3/8"	2"	__	3 3/4"	Galvanized Iron	__	__	__	Set Screws	0000000	00000
1 5/8"	4 3/8"	2"	__	4 1/8"	Galvanized Iron	__	__	__	Set Screws	0000000	00000
1 7/8"	4 3/8"	2"	__	4 3/8"	Galvanized Iron	__	__	__	Set Screws	0000000	00000
2 3/8"	4 3/8"	2"	__	4 5/8"	Galvanized Iron	__	__	__	Set Screws	00000000	00000
L-Shaped
1 3/8"	5 1/8"	3"	__	3 1/16"	Galvanized Iron	4	7/16"	No	Set Screws	00000000	00000
1 5/8"	5 3/4"	3 1/8"	__	3 9/16"	Galvanized Iron	4	7/16"	No	Set Screws	00000000	00000
1 7/8"	6 3/8"	3 5/8"	__	3 9/16"	Galvanized Iron	4	7/16"	No	Set Screws	00000000	00000
Oval
1"	4 9/16"	2 1/2"	__	3 1/8"	Galvanized Iron	2	7/16"	No	Set Screws	00000000	00000
1 3/8"	5 1/16"	3"	__	3 1/2"	Galvanized Iron	2	9/16"	No	Set Screws	0000000	00000
1 5/8"	5 1/2"	3"	__	3 1/2"	Galvanized Iron	2	9/16"	No	Set Screws	0000000	00000
1 7/8"	6 1/8"	3 3/8"	__	3 1/2"	Galvanized Iron	2	9/16"	No	Set Screws	0000000	00000
2 3/8"	6 1/2"	4"	__	5"	Galvanized Iron	2	11/16"	No	Set Screws	00000000	00000
Round
1"	__	__	3 1/8"	1 9/16"	Galvanized Iron	4	1/4"	No	Set Screws	00000000	00000
1"	__	__	5 1/8"	2 1/2"	Galvanized Iron	4	5/16"	No	Set Screws	00000000	00000
1 3/8"	__	__	3 9/16"	1 15/16"	Galvanized Iron	4	1/4"	No	Set Screws	0000000	00000
1 3/8"	__	__	5 1/2"	2 1/2"	Galvanized Iron	4	5/16"	No	Set Screws	00000000	00000
1 5/8"	__	__	4"	2"	Galvanized Iron	4	1/4"	No	Set Screws	0000000	00000
1 5/8"	__	__	5 7/8"	2 1/2"	Galvanized Iron	4	5/16"	No	Set Screws	00000000	00000
1 7/8"	__	__	4 1/2"	2 5/16"	Galvanized Iron	4	1/4"	No	Set Screws	0000000	00000
1 7/8"	__	__	6 1/8"	2 1/2"	Galvanized Iron	4	5/16"	No	Set Screws	00000000	00000
2 3/8"	__	__	5"	2 1/2"	Galvanized Iron	4	3/8"	No	Set Screws	00000000	00000
Flush
1 3/8"	3 3/4"	4 1/8"	__	2"	Galvanized Iron	3	7/16"	No	Set Screws	00000000	00000
1 5/8"	4 1/4"	4 1/4"	__	2 1/4"	Galvanized Iron	3	7/16"	No	Set Screws	00000000	00000
1 7/8"	4 3/8"	4 5/8"	__	2 1/2"	Galvanized Iron	3	7/16"	No	Set Screws	00000000	00000
Offset
1 3/8"	3 3/4"	1 3/4"	__	5 5/16"	Galvanized Iron	2	9/16"	No	Set Screws	0000000	00000
1 5/8"	4 1/4"	2"	__	5 7/16"	Galvanized Iron	2	9/16"	No	Set Screws	0000000	00000
1 7/8"	4 3/4"	2 1/4"	__	5 3/4"	Galvanized Iron	2	9/16"	No	Set Screws	0000000	00000

Through-Hole Rail Supports

Through-hole fittings allow rails to run all the way through.

Rail supports secure long runs of railing.

	Flange				Mounting Holes
For Rail OD	Lg.	Wd.	Overall Ht.	Material	No. of	Dia.	Mounting Fasteners Included	Includes		Each
Offset
1"	3"	1 7/8"	2 7/8"	Galvanized Iron	2	5/16"	No	Set Screws	00000000	000000
1 3/8"	3 7/16"	1 5/8"	3 1/4"	Galvanized Iron	2	5/16"	No	Set Screws	00000000	00000
1 5/8"	4"	1 3/4"	3 5/8"	Galvanized Iron	2	5/16"	No	Set Screws	00000000	00000
1 7/8"	4 1/4"	1 7/8"	4"	Galvanized Iron	2	5/16"	No	Set Screws	00000000	00000

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About Carbon Steel, Alloy Steel, Spring Steel, and Cast Iron

Easy-to-Machine Gray Cast Iron Tubes

Galvanized Iron and Steel Slip-On Framing and Fittings