Grade 8 Steel Screws | McMaster-Carr

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Corrosion-Resistant Coated

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70,000 psi to 79,999 psi

80,000 psi to 89,999 psi

90,000 psi to 99,999 psi

100,000 psi or greater

Not Rated

DFARS Specialty Metals

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Compliant with Exemptions

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U.S.–Mexico–Canada Agreement (USMCA) Qualifying

Yes

Export Control Classification Number (ECCN)

EAR99

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15,026 Products

Fastening and Joining

Socket Head Screws

With a deeper drive than flat and rounded head screws, these withstand more torque for a tighter hold

4,324 products

Hex Head Screws

Used with nuts to create a stronger joint than flat and rounded screws

3,375 products

Flat Head Screws

Fit in countersunk holes for a flush finish that won't snag on surrounding parts

1,905 products

Rounded Head Screws

Sit just above the surface for a low-profile finish and hold tighter than flat head screws

1,214 products

Shoulder Screws

Rotate parts around the cylinder under the head to guide and align them during installation

2,532 products

Tapping Screws

Fasten a range of materials together without needing to tap the hole first

514 products

Thumb Screws

Tighten and loosen by hand without the need for tools

291 products

Fastener Assortments

Keep a variety of common screws, nuts, and washers on hand

2 products

Carriage Bolts

A smooth head provides a finished look while a square neck keeps the bolt in place when using a nut

57 products

Set Screws

Exert pressure at the tip to hold parts in place, unlike screws that hold material together with threads

35 products

Captive Panel Screws

Secure panels and enclosures while still having access to them

77 products

Wood Screws

Fasten material to wood or pieces of wood to each other

75 products

Hex Nuts

Handle most general fastening needs

157 products

Screwdrivers

Tighten and loosen screws

23 products

L-Keys

Turn fasteners from either end and reach into tight spots

38 products

Screwdriver Bits

Pair with drivers to turn screws

26 products

T-Handle Keys

To turn fasteners in hard-to-reach spots, there's a long shaft and a grip for your whole hand

48 products

Speeder Handles

Crank the handle to fasten nuts and bolts quickly

1 product

Nutdrivers

Tighten and loosen nuts and bolts

7 products

Fabricating and Machining

T-Slot Covers

Snap into T-slots to block chips, debris, and small parts from falling in

6 products

T-Slot Bolts

Secure clamps and workpieces to machine tables with quicker setup than a T-slot nut and stud

262 products

T-Slot Cleaners

Scrape debris out of machine table T-slots

2 products

Fixture Kits

Everything needed to mount workpieces of different sizes to your machine table

50 products

Building and Machinery Hardware

Clamp-On Framing Fasteners

Tighten to hold clamp-on framing in place

1 product