McMaster-Carr

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	System of Measurement System of Measurement

Inch

Metric

	Thread Size Thread Size

	Nut Style Nut Style


Single	Spring Loaded Ball

Spring Tab	Double

Self-Aligning	With Handle

Hammer	With Stud

Triple	Spring

Single with Threadlocker	Double Spring

Push In

	Rail Height Rail Height

	Mounting Fastener Thread Size Mounting Fastener Thread Size

	Rail Profile Rail Profile

	Double
	Quad
	Single
	Triple

	For Slot Width For Slot Width

	Material Material

	Base Width Base Width

	Mounting Fastener Installation Type Mounting Fastener Installation Type

End Feed

Drop In

	Threading Threading

Fully Threaded

Partially Threaded

	Fastener Type Fastener Type

Screw and Nut Set

Nut

Nut Plate

Button Head Cap Screw

	Base Height Base Height

	Fastener Head Style Fastener Head Style


Button	Flanged Button

Socket

	Mounting Fastener Thread Length Mounting Fastener Thread Length

	Overall Height Overall Height

	Color Color

	Silver
	Black
	White

	Finish Finish

Zinc Plated

Black Oxide

	Mounting Hole Location Mounting Hole Location

Offset

Center

	Mounting Fastener Drive Style Mounting Fastener Drive Style

Hex

External Hex

	Thread Fit Thread Fit

	Nut Type Nut Type


Hex	Locknut

Twist On	Round

	Height Height

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402 Products

Structural Framing

T-Slotted Framing Fasteners

Screws and nuts secure brackets and accessories to T-slotted rails.

Miniature T-Slotted
Framing and Fittings

Build test fixtures, prototypes, and other small structures with this miniature version of T-slotted framing and fittings.

Fabricating and Machining

T-Slot Nuts

Designed to slide into T-slot tracks on machine tool tables, use these nuts to secure clamps and workpieces.

Secure-Hold T-Slot Nuts

After sliding the nut into a T-slot, tighten the set screw to keep it in place.

Drop-In T-Slot Nuts

Install from the top of the T-slot track and secure with a quarter turn. Also known as quarter-turn T-slot nuts.

T-Slot Nut and Setup Stud Kits

For mounting items to your machine table, these kits contain the full system of necessary components.

Setup Clamp and T-Slot Fastener Kits

Get everything needed for basic workholding on a machine table.

Economy Setup Clamp
and T-Slot Fastener Kits

Good for occasional machining, economy kits contain lower-strength components than standard kits.

Lathe Chuck Jaw Nuts

Secure jaws to a CNC lathe chuck with industry standard 1.5 mm × 60° serrations.

Nuts

Low-Strength Steel Locknuts
for use with Cotter Pins

About half the strength of medium-strength steel locknuts, these are for light duty fastening applications, such as securing access panels.

Medium-Strength Steel Locknuts
for use with Cotter Pins—Grade 5

Also known as castle nuts, secure these nuts by inserting a cotter pin or safety wire through the slots and a drilled hole in your bolt for mild loosening resistance.

Metric Medium-Strength
Steel Locknuts for use
with Cotter Pins—Class 8

Secure these metric nuts by inserting a cotter pin or safety wire through the slots and a drilled hole in your bolt for mild loosening resistance. Often referred to as castle nuts.

Stainless Steel Locknuts
for use with Cotter Pins

Stainless steel locknuts have excellent corrosion resistance in most environments.

Steel Slip-On Twist-Close Nuts

Attach these slip-on nuts at any point on a threaded rod for quick installation.

Metric Steel Slip-On Twist-Close Nuts

Attach these metric slip-on nuts at any point on a threaded rod for quick installation.

Stainless Steel Slip-On
Twist-Close Nuts

Stainless steel nuts have excellent corrosion resistance in most environments.

Metric Slotted Round
Nuts for Tight Spaces

With a slim, round profile and a slotted drive, these metric nuts work in tight spots where there's no room for a wrench to turn. Instead, tighten them from the center of the nut with a slotted screwdriver.

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