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A105 Threaded Hex Union

The A105 Threaded Hex Union is a critical component in piping systems, designed to facilitate the connection of two pipes while allowing for easy disassembly. Constructed from carbon steel, this union can effectively withstand temperature fluctuations and is corrosion resistant. Its hexagonal shape provides a secure grip for installation and maintenance.

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Governing Standards
Chemical Properties
Mechanical Properties
Dimensional Specifications

ASTM A105	Covers forged carbon steel piping components for ambient- and higher-temperature service in pressure systems. Included are flanges, fittings, Valves, and similar parts ordered either to dimensions specified by the purchaser or to dimensional standards.
ASME B16.11	Covers ratings, dimensions, tolerances, marking and material requirements for socket-welding and threaded forged fittings. These fittings are designated as Class 2000, 3000, and 6000 for threaded end fittings and Class 3000, 6000, and 9000 for socket-weld end fittings.

Dimensional Specifications

Dimensional SpecificationsA105 Threaded 90 Degree Elbow

A105 Threaded 45 Degree Elbow dimensions

	Sizes	1/8	1/4	3/8	1/2	3/4	1	1 1/4	1 1/2	2	2 1/2	3
3000	A	1.703125	1.718750	1.875000	2.000000	2.281250	2.500000	2.875000	3.031250	3.500000	4.046875	4.296875
	B	1.37500	1.37500	1.56250	1.81250	2.17188	2.56250	3.12500	3.50000	4.25000	4.87500	5.75000
	C	0.875000	0.875000	1.031250	1.234375	1.484375	1.812500	2.234375	2.484375	3.031250	3.656250	4.406250
6000	A		1.875000	1.984375	2.296875	2.500000	2.875000	3.015625	3.531250	4.265625
	B		1.57813	1.81250	2.20313	2.57813	3.10938	3.42188	4.09375	4.87500
	C		1.031250	1.234375	1.468750	1.796875	2.171875	2.468750	3.031250	3.656250

Dimensions in Millimeters
Dimension B is minimum length of perfect thread. The length of useful thread (B plus threads with fully formed roots and flat crests) shall not be less than L2. (Effective length of external thread) required by American National Standard for Pipe Threads (ANSI / ASME B1.20.1)

A105 Threaded Hex Union

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Item # Pipe Diameter Pressure Class

PUN3MTHC1.25 A105 Threaded Hex Union Pipe Diameter 1 1/4 Quantity Discounts A105 Threaded Hex Union Pressure Class 3M Quantity Discounts Items

1 1/4'' 3M A105 Threaded Hex Union

Pipe Diameter	1 1/4
Pressure Class	3M

Origin: Urestricted Origin
Item# PUN3MTHC1.25-I

Origin: Non China/Non India
Item# PUN3MTHC1.25-R

Origin: Approved
Item# PUN3MTHC1.25-X

Origin: North America
Item# PUN3MTHC1.25-U

PUN3MTHC.125 A105 Threaded Hex Union Pipe Diameter 1/8 Quantity Discounts A105 Threaded Hex Union Pressure Class 3M Quantity Discounts Items

1/8'' 3M A105 Threaded Hex Union

Pipe Diameter	1/8
Pressure Class	3M

Origin: Urestricted Origin
Item# PUN3MTHC.125-I

Origin: Approved
Item# PUN3MTHC.125-X

PUN6MTHC2 A105 Threaded Hex Union Pipe Diameter 2 Quantity Discounts A105 Threaded Hex Union Pressure Class 6M Quantity Discounts Items

2'' 6M A105 Threaded Hex Union

Pipe Diameter	2
Pressure Class	6M

Origin: North America
Item# PUN6MTHC2-U

PUN3MTHC1 A105 Threaded Hex Union Pipe Diameter 1 Quantity Discounts A105 Threaded Hex Union Pressure Class 3M Quantity Discounts Items

1'' 3M A105 Threaded Hex Union

Pipe Diameter	1
Pressure Class	3M

Origin: Non China/Non India
Item# PUN3MTHC1-R

Origin: Approved
Item# PUN3MTHC1-X

Origin: North America
Item# PUN3MTHC1-U

Origin: Urestricted Origin
Item# PUN3MTHC1-I

PUN6MTHC1 A105 Threaded Hex Union Pipe Diameter 1 Quantity Discounts A105 Threaded Hex Union Pressure Class 6M Quantity Discounts Items

1'' 6M A105 Threaded Hex Union

Pipe Diameter	1
Pressure Class	6M

Origin: North America
Item# PUN6MTHC1-U

PUN3MTHC.50 A105 Threaded Hex Union Pipe Diameter 1/2 Quantity Discounts A105 Threaded Hex Union Pressure Class 3M Quantity Discounts Items

1/2'' 3M A105 Threaded Hex Union

Pipe Diameter	1/2
Pressure Class	3M

Origin: Approved
Item# PUN3MTHC.50-X

Origin: Urestricted Origin
Item# PUN3MTHC.50-I

Origin: Non China/Non India
Item# PUN3MTHC.50-R

Origin: North America
Item# PUN3MTHC.50-U

PUN3MTHC1.5 A105 Threaded Hex Union Pipe Diameter 1 1/2 Quantity Discounts A105 Threaded Hex Union Pressure Class 3M Quantity Discounts Items

1 1/2'' 3M A105 Threaded Hex Union

Pipe Diameter	1 1/2
Pressure Class	3M

Origin: Non China/Non India
Item# PUN3MTHC1.5-R

Origin: Approved
Item# PUN3MTHC1.5-X

Origin: North America
Item# PUN3MTHC1.5-U

Origin: Urestricted Origin
Item# PUN3MTHC1.5-I

PUN6MTHC.75 A105 Threaded Hex Union Pipe Diameter 3/4 Quantity Discounts A105 Threaded Hex Union Pressure Class 6M Quantity Discounts Items

3/4'' 6M A105 Threaded Hex Union

Pipe Diameter	3/4
Pressure Class	6M

Origin: North America
Item# PUN6MTHC.75-U

Origin: Urestricted Origin
Item# PUN6MTHC.75-I

Origin: Non China/Non India
Item# PUN6MTHC.75-R

Origin: Approved
Item# PUN6MTHC.75-X

PUN6MTHC.50 A105 Threaded Hex Union Pipe Diameter 1/2 Quantity Discounts A105 Threaded Hex Union Pressure Class 6M Quantity Discounts Items

1/2'' 6M A105 Threaded Hex Union

Pipe Diameter	1/2
Pressure Class	6M

Origin: North America
Item# PUN6MTHC.50-U

Origin: Non China/Non India
Item# PUN6MTHC.50-R

Origin: Urestricted Origin
Item# PUN6MTHC.50-I

Origin: Approved
Item# PUN6MTHC.50-X

PUN3MTHC.75 A105 Threaded Hex Union Pipe Diameter 3/4 Quantity Discounts A105 Threaded Hex Union Pressure Class 3M Quantity Discounts Items

3/4'' 3M A105 Threaded Hex Union

Pipe Diameter	3/4
Pressure Class	3M

Origin: Approved
Item# PUN3MTHC.75-X

Origin: North America
Item# PUN3MTHC.75-U

Origin: Urestricted Origin
Item# PUN3MTHC.75-I

Origin: Non China/Non India
Item# PUN3MTHC.75-R

PUN3MTHC2 A105 Threaded Hex Union Pipe Diameter 2 Quantity Discounts A105 Threaded Hex Union Pressure Class 3M Quantity Discounts Items

2'' 3M A105 Threaded Hex Union

Pipe Diameter	2
Pressure Class	3M

Origin: North America
Item# PUN3MTHC2-U

Origin: Urestricted Origin
Item# PUN3MTHC2-I

Origin: Approved
Item# PUN3MTHC2-X

Origin: Non China/Non India
Item# PUN3MTHC2-R

PUN3MTHC.25 A105 Threaded Hex Union Pipe Diameter 1/4 Quantity Discounts A105 Threaded Hex Union Pressure Class 3M Quantity Discounts Items

1/4'' 3M A105 Threaded Hex Union

Pipe Diameter	1/4
Pressure Class	3M

Origin: North America
Item# PUN3MTHC.25-U

Origin: Urestricted Origin
Item# PUN3MTHC.25-I

Origin: Approved
Item# PUN3MTHC.25-X

PUN6MTHC.375 A105 Threaded Hex Union Pipe Diameter 3/8 Quantity Discounts A105 Threaded Hex Union Pressure Class 6M Quantity Discounts Items

3/8'' 6M A105 Threaded Hex Union

Pipe Diameter	3/8
Pressure Class	6M

Origin: Non China/Non India
Item# PUN6MTHC.375-R

Origin: North America
Item# PUN6MTHC.375-U

Origin: Approved
Item# PUN6MTHC.375-X

Origin: Urestricted Origin
Item# PUN6MTHC.375-I

PUN3MTHC.375 A105 Threaded Hex Union Pipe Diameter 3/8 Quantity Discounts A105 Threaded Hex Union Pressure Class 3M Quantity Discounts Items

3/8'' 3M A105 Threaded Hex Union

Pipe Diameter	3/8
Pressure Class	3M

Element	Carbon	Manganese	Phosphorus	Sulfur	Silicon	Copper	Nickel	Chromium	Molybdenum	Vanadium

Composition, %	0.35 max	0.60-1.05	0.035 max	0.040 max	0.10-0.35	0.40 max (1)	0.40 max (1)	0.30 max (1-2)	0.12 max (1-2)	0.08 max

Per ASTM A105-A105M - 24
Grade A105	Tensile Strength	Yield Strength	Elongation in 4D	Reduction in Area	Hardness
Grade A105	Min ksi [MPa]	Min ksi [Mpa]	Min %	Min %	Max
	70 [485]	36 [250]	22	30	197