Block Nuts | McMaster-Carr

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System of Measurement

Thread Size

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

Base Width

Locking Type

Slot Width

Thread Pitch

T-Slotted Framing Rail Profile

Thread Type

Hex Nut Profile

Length

Weld Nut Shape

Rectangular with Floating Nut

Square

Mounting Fastener Thread Size

Thread Direction

Strut Channel Type

RoHS

Compliant with Exemptions

Not Compliant

DFARS Specialty Metals

Compliant

Exempt

Not Compliant

Export Control Classification Number (ECCN)

EAR99

Fastener Strength Grade/Class

REACH

1,708 Products

Fastening and Joining

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

100 products

Flange Nuts

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

193 products

Square Nuts

Flat sides won’t spin in channels and square holes

160 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

10 products

Building and Machinery Hardware

Strut Channel Framing and Fittings

Secure fittings in the U-shaped channel to route conduit and pipe or build other structures

220 products

Locking-Slotted Framing Nuts

Secure brackets and other accessories to locking-slotted rails

3 products

T-Slotted Framing Fasteners

Secure brackets and other accessories to T-slotted rails

261 products

Power Transmission

Lead Screw Nuts

Mate with lead screws to move components in a straight line

28 products

Fabricating and Machining

T-Slot Nuts

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

290 products