UNF Weld Bungs | McMaster-Carr

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	System of Measurement System of Measurement

Inch

	Thread Size Thread Size

	Thread Type Thread Type	Show

UNF

	Thread Type Thread Type	Hide

	For Tube OD For Tube OD

	For Tube Wall Thickness For Tube Wall Thickness

	Thread Direction Thread Direction


Right Hand	Left Hand

	Nut Type Nut Type


Tube End	Weld

Flange	Hex

Square

	Material Material

Steel

Stainless Steel

	Height Height

	Threading Threading

	Fully Threaded
	Partially Threaded

	Thread Length Thread Length

	Thread Spacing Thread Spacing

Fine

	Thread Fit Thread Fit

Class 1B

Class 2B

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

REACH Compliant

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

RoHS Compliant

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

DFARS Specialty Metals
COTS-Exempt

DFARS Specialty Metals
Compliant

	Weld Nut Shape Weld Nut Shape

	Round
	Hex
	Rectangular
	Square
	Rectangular with Floating Nut

	Barrel Profile Barrel Profile

	Standard
	Low

	Width Width

	Specifications Met Specifications Met

ASME

	Base Width Base Width

	Barrel Height Barrel Height

	Barrel Diameter Barrel Diameter

173 Products

About Nuts, Materials, and Finishes

Tube-End Weld Nuts

About half the strength of medium-strength steel coupling nuts, these metric nuts are for light duty fastening applications.

Left-Hand Threaded Tube-End Weld Nuts

Use these tube-end weld nuts with left-hand threaded fasteners.

Weld Nuts

Steel Hex Weld Nuts

Weld these nuts to flat and uneven uncoated steel surfaces for a strong permanent hold.

Stainless Steel Hex Weld Nuts

You can weld these nuts to flat and uneven uncoated stainless steel surfaces for a strong permanent hold.

Square Weld Nuts

Square weld nuts have more weld points than hex weld nuts for a stronger hold. Use them on flat surfaces.

Steel Round-Base Weld Nuts

A smooth base provides more contact with the mating surface than weld nuts with projections.

Stainless Steel Round-Base Weld Nuts

Weld these nuts to stainless steel surfaces.

Round-Base Weld Nuts with Projections

Projections on the base concentrate the weld and provide room for heat to dissipate.

Steel Narrow-Base Weld Nuts

These nuts can be used in channels and tight spaces where round-base weld nuts won't fit.

Stainless Steel Narrow-Base Weld Nuts

Weld these nuts to stainless steel surfaces.

Low-Profile Narrow-Base Weld Nuts

A smooth base provides more contact with the mating surface than weld nuts with projections.

Low-Profile Narrow-Base Weld Nuts with Projections

Projections on the base concentrate the weld and provide room for heat to dissipate.

Stainless Steel Offset-Barrel Narrow-Base Weld Nuts

Weld these nuts to stainless steel surfaces.

Steel Offset-Barrel Narrow-Base Weld Nuts

Weld these nuts to uncoated steel surfaces.

Aligning Weld Nuts

Threads float inside the retainer so you can install a bolt at a slight angle to align with off center parts.