Machine Bolts | McMaster-Carr

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Material

Aluminum Oxide Ceramic

Stainless Steel

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Partially Threaded

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Black Zinc Plated

Corrosion-Resistant Coated

Hot-Dipped Galvanized

Phosphate Coated

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Fastener Strength Grade/Class

ASTM Grade A325

ASTM Grade A490

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Specifications Met

Federal Specification

Screw Size

Drive Size

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Tensile Strength

Less than 20,000 psi

20,000 psi to 39,999 psi

40,000 psi to 59,999 psi

60,000 psi to 99,999 psi

100,000 psi or greater

DFARS Specialty Metals

RoHS

Compliant with Exemptions

REACH

Export Control Classification Number (ECCN)

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36,524 Products

Fastening and Joining

Hex Head Screws

Hex Head Screws

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

Flat Head Screws

Flat Head Screws

Fit in countersunk holes for a flush finish

Socket Head Screws

Socket Head Screws

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

Rounded Head Screws

Rounded Head Screws

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

10,403 products

Square Head Screws

Square Head Screws

Turn the large flat sides with a wrench into square holes that stop further rotation

Tapping Screws

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

12-Point Screws

12-Point Screws

12 contact points handle more torque than a hex head while a flange eliminates the need for a washer

Fastener Assortments

Fastener Assortments

Stay prepared by keeping fasteners in common sizes and materials on hand

Pentagon Head Screws

Pentagon Head Screws

Create a tamper-resistant joint with a head than can only be removed with a 5-point socket

Fabricating and Machining

T-Tracks

Add fixturing to flat surfaces on machines such as table saws, CNC routers, and drill presses

The quick brown fox jumped over the lazy dog. Pedestal (35" Ht. x 4" Wd. x 4" Dp.)