Clamping Studs | McMaster-Carr

	System of Measurement System of Measurement

Inch

Metric

	Thread Size Thread Size

	Thread Pitch Thread Pitch

	Length Length

	Material Material

Steel

Stainless Steel

Aluminum

	Minimum Tensile Strength Minimum Tensile Strength

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

RoHS Compliant

RoHS Compliant with
Exemptions

	Minimum Hardness Minimum Hardness

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

REACH Compliant

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

DFARS Specialty Metals
COTS-Exempt

DFARS Specialty Metals
Compliant

	Thread Fit Thread Fit

Class 2A

Class 6g

	Specifications Met Specifications Met

DIN 939

DIN 938

DIN 6379

	Clamping Action Clamping Action

Push Only

Hold Down

Spread

	For Slot Width For Slot Width

	Head Material Head Material

Steel

Brass

Stainless Steel

	For Maximum ID For Maximum ID

	Size Size

	Thread Length Thread Length

	Maximum Clamping Force Maximum Clamping Force

	Screw Material Screw Material

Steel

Stainless Steel

	Head Height Head Height

	Head Width Head Width

	T-Slot Nut Base Width T-Slot Nut Base Width

851 Products

About Threaded Studs and Rods

Setup Studs

Secure setup clamps and fixtures to your machine table, or assemble heavy machines, such as engine mounts.

Vibration-Resistant Setup Studs

Also known as tap-end and fixture studs, these rods have friction-fit threads on one end to resist loosening and standard threads on the other side for attaching a nut.

T-Slot Nut and Setup Stud Kits

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

Fixture Clamps

Inside Diameter Fixture Clamps

Secure a workpiece from the inside, leaving the outside clear for machining.

Inside Diameter Fixture Clamps
for Castings and Rough Parts

These clamps wedge against the workpiece ID to grip cast, unfinished, or uneven parts, leaving the outside clear for machining.

Hold-Down Fixture Clamps

Tighten the spring-loaded socket head cap screw on these clamps to hold your workpiece from above.

Air-Powered Hold-Down Fixture Clamps

Mount using the holes in the base.

Threaded Air-Powered Hold-Down Fixture Clamps

Screw these clamps directly into a tapped hole in a fixture.

Low-Profile Fixture Clamps

Install these clamps into a slot in your fixture to grip at the bottom of a workpiece edge, giving the cutting tool maximum access.

Machinable Low-Profile Fixture Clamps

Machine these fixture clamps to match the contours of your workpiece for a stronger grip.

Machinable Fixture Clamps

Machine these clamps to match the contours of your workpiece and turn the screw to grip.

Dual-Clamping Fixture Clamps

Set one of these clamps between two workpieces in a fixture and tighten the screw to push the clamp's sides out for a secure hold.

Ball-Lock Quick-Change Fixture Clamps

Build these components into fixture plates, machine subplates, and tombstones for quick changes. The system clamps and locates at the same time for accurate positioning with repeatability of ±0.0005".

Machinable Dual-Clamping Fixture Clamps

Machine these fixture clamps to match the contours of your workpieces for a stronger grip. Place the clamp between the two workpieces in a fixture and tighten the screw to extend the sides of the clamp, creating a secure hold against both workpieces.

Fixture Clamps

Hold a workpiece securely from the side with minimal contact, leaving more of the workpiece free for machining.

Fixture Clamps for Castings and Rough Parts

Unlike the smooth and flat edges of standard fixture clamps, these clamps have ridges that bite into parts, making them good for gripping castings and rough-cut stock.