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Alloy Steel Socket Head Screws

Category: Fastener
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With a tensile strength of 170,000 psi, these alloy steel screws are stronger than Grade 8 steel screws. Length is measured from under the head.
Black-oxide steel screws are mildly corrosion resistant in dry environments. Zinc-plated steel screws resist corrosion in wet environments.

The screws with a blue-dyed finish are easy to distinguish. Zinc-flake-coated steel screws are 20 times as corrosion resistant as zinc-plated screws and

comparable to Dacromet-coated screws. Zinc-aluminum-coated steel screws are 40 times as corrosion resistant as zinc-plated screws and comparable to Magni-coated screws.

They withstand 1,000 hours of salt spray per ASTM B117.
Coarse threads are the industry standard; choose these screws if you don’t know the pitch or threads per inch.

Fine and extra-fine threads are closely spaced to prevent loosening from vibration; the finer the thread, the better the resistance.

They are not compatible with coarse threads.
Screws that meet ASTM A574, ASTM A574M, and ISO 898-1 comply with specifications and testing requirements for material quality.

Threaded Size

Length

Threading

Min.
Thread Lg.

Threaded
Spacing

Head Dia.

Head Ht.

Drive
Size

Tensile
Strength,psi

Specifications Met

Material

10-24

1 1/4"

Partially Threaded

3/4"

Coarse

5/16"

0.19"

5/32"

170,000

ASTM A574

Zinc-Plated Alloy Steel

10-24

1 1/2"

Partially Threaded

1"

Coarse

5/16"

0.19"

5/32"

170,000

ASTM A574

Zinc-Plated Alloy Steel

10-24

1 3/4"

Partially Threaded

3/4"

Coarse

5/16"

0.19"

5/32"

170,000

ASTM A574

Zinc-Plated Alloy Steel

10-24

2"

Partially Threaded

1"

Coarse

5/16"

0.19"

5/32"

170,000

ASTM A574

Zinc-Plated Alloy Steel

10-24

2 1/4"

Partially Threaded

3/4"

Coarse

5/16"

0.19"

5/32"

170,000

ASTM A574

Zinc-Plated Alloy Steel

10-24

2 1/2"

Partially Threaded

1"

Coarse

5/16"

0.19"

5/32"

170,000

ASTM A574

Zinc-Plated Alloy Steel

10-24

2 3/4"

Partially Threaded

3/4"

Coarse

5/16"

0.19"

5/32"

170,000

ASTM A574

Zinc-Plated Alloy Steel

10-24

3"

Partially Threaded

1"

Coarse

5/16"

0.19"

5/32"

170,000

ASTM A574

Zinc-Plated Alloy Steel

10-24

3 1/2"

Partially Threaded

1"

Coarse

5/16"

0.19"

5/32"

170,000

ASTM A574

Zinc-Plated Alloy Steel

10-24

1/4"

Fully Threaded

__

Coarse

5/16"

0.19"

5/32"

170,000

ASME B18.3, ASTM A574, ASTM B117

Zinc-Aluminum Coated Alloy Steel

10-24

3/8"

Fully Threaded

__

Coarse

5/16"

0.19"

5/32"

170,000

ASME B18.3, ASTM A574, ASTM B117

Zinc-Aluminum Coated Alloy Steel

10-24

1/2"

Fully Threaded

__

Coarse

5/16"

0.19"

5/32"

170,000

ASME B18.3, ASTM A574, ASTM B117

Zinc-Aluminum Coated Alloy Steel

10-24

5/8"

Fully Threaded

__

Coarse

5/16"

0.19"

5/32"

170,000

ASME B18.3, ASTM A574, ASTM B117

Zinc-Aluminum Coated Alloy Steel

10-24

3/4"

Fully Threaded

__

Coarse

5/16"

0.19"

5/32"

170,000

ASME B18.3, ASTM A574, ASTM B117

Zinc-Aluminum Coated Alloy Steel

10-24

7/8"

Fully Threaded

__

Coarse

5/16"

0.19"

5/32"

170,000

ASME B18.3, ASTM A574, ASTM B117

Zinc-Aluminum Coated Alloy Steel

10-24

1"

Fully Threaded

__

Coarse

5/16"

0.19"

5/32"

170,000

ASME B18.3, ASTM A574, ASTM B117

Zinc-Aluminum Coated Alloy Steel

10-24

1 1/4"

Partially Threaded

7/8"

Coarse

5/16"

0.19"

5/32"

170,000

ASME B18.3, ASTM A574, ASTM B117

Zinc-Aluminum Coated Alloy Steel

10-24

1 1/2"

Partially Threaded

7/8"

Coarse

5/16"

0.19"

5/32"

170,000

ASME B18.3, ASTM A574, ASTM B117

Zinc-Aluminum Coated Alloy Steel

10-24

1 3/4"

Partially Threaded

7/8"

Coarse

5/16"

0.19"

5/32"

170,000

ASME B18.3, ASTM A574, ASTM B117

Zinc-Aluminum Coated Alloy Steel

10-24

2"

Partially Threaded

7/8"

Coarse

5/16"

0.19"

5/32"

170,000

ASME B18.3, ASTM A574, ASTM B117

Zinc-Aluminum Coated Alloy Steel

10-24

2 1/4"

Partially Threaded

7/8"

Coarse

5/16"

0.19"

5/32"

170,000

ASME B18.3, ASTM A574, ASTM B117

Zinc-Aluminum Coated Alloy Steel

10-24

2 1/2"

Partially Threaded

7/8"

Coarse

5/16"

0.19"

5/32"

170,000

ASME B18.3, ASTM A574, ASTM B117

Zinc-Aluminum Coated Alloy Steel

10-32

5/32"

Fully Threaded

__

Fine

5/16"

0.19"

5/32"

170,000

ASTM A574

Black-Oxide Alloy Steel

10-32

3/16"

Fully Threaded

__

Fine

5/16"

0.19"

5/32"

170,000

ASTM A574

Black-Oxide Alloy Steel

10-32

1/4"

Fully Threaded

__

Fine

5/16"

0.19"

5/32"

170,000

ASTM A574

Black-Oxide Alloy Steel

10-32

5/16"

Fully Threaded

__

Fine

5/16"

0.19"

5/32"

170,000

ASTM A574

Black-Oxide Alloy Steel

10-32

3/8"

Fully Threaded

__

Fine

5/16"

0.19"

5/32"

170,000

ASTM A574

Black-Oxide Alloy Steel

10-32

7/16"

Fully Threaded

__

Fine

5/16"

0.19"

5/32"

170,000

ASTM A574

Black-Oxide Alloy Steel

10-32

1/2"

Fully Threaded

__

Fine

5/16"

0.19"

5/32"

170,000

ASTM A574

Black-Oxide Alloy Steel

10-32

9/16"

Fully Threaded

__

Fine

5/16"

0.19"

5/32"

170,000

ASTM A574

Black-Oxide Alloy Steel

10-32

5/8"

Fully Threaded

__

Fine

5/16"

0.19"

5/32"

170,000

ASTM A574

Black-Oxide Alloy Steel