Block Nuts | McMaster-Carr

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System of Measurement

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Material

Nut Type

Finish

Hot-Dipped Galvanized

Zinc Yellow-Chromate Plated

Height

Width

T-Slotted Framing Nut Type

Double

Double Spring

Easy-Slide Spring Tab

Self-Aligning Spring Tab

Self-Aligning Spring-Loaded Ball

Self-Aligning with Handle

Set Screw

Set Screw and Spring-Loaded Ball

Single

Single with Threadlocker

Rail Height

Locking Type

Base Width

Thread Pitch

Slot Width

T-Slotted Framing Rail Profile

Thread Type

Mounting Fastener Thread Size

Hex Nut Profile

Thread Direction

Weld Nut Shape

Rectangular with Floating Nut

Strut Channel Type

Length

Fastener Strength Grade/Class

DFARS Specialty Metals

RoHS

Compliant with Exemptions

Not Compliant

REACH

Compliant

Not Compliant

Export Control Classification Number (ECCN)

EAR99

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1,594 Products

Fastening and Joining

Square Nuts

Flat sides won’t spin in channels and square holes

160 products

Flange Nuts

The flange distributes pressure, so you don't need a washer

193 products

Locknuts

Hold fasteners in place to prevent loosening from vibration

194 products

Tamper-Resistant Nuts

Hard to detach without special tools to prevent unwanted removal

9 products

Weld Nuts

Weld to metal surfaces to add permanent threads

267 products

Snap-In Nuts

Push into square holes in thin materials to add bolts for aligning off-center parts

98 products

Power Transmission

Lead Screw Nuts

Mate with lead screws to move components in a straight line

28 products

Building and Machinery Hardware

Strut Channel Nuts

Fasten on threaded rod to connect components to strut channel

217 products

T-Slotted Framing Fasteners

Secure brackets and other accessories to T-slotted rails

261 products

Locking-Slotted Framing Nuts

Secure brackets and other accessories to locking-slotted rails

3 products

Fabricating and Machining

T-Slot Nuts

Combine with setup studs or bolts to mount fixtures to machine tables

181 products