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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.

Screws that meet ASME B18.3, ASME B18.3M, ISO 21269, and ISO 4762 (formerly DIN 912) comply with specifications for dimensional standards.

Threaded Size

Length

Threading

Min.
Thread Lg.

Threaded
Spacing

Head Dia.

Head Ht.

Drive
Size

Tensile
Strength,psi

Specifications Met

Material

6-32

9/16"

Fully Threaded

__

Coarse

0.226"

0.138"

7/64"

170,000

ASTM A574

Black-Oxide Alloy Steel

6-32

5/8"

Fully Threaded

__

Coarse

0.226"

0.138"

7/64"

170,000

ASTM A574

Black-Oxide Alloy Steel

6-32

3/4"

Fully Threaded

__

Coarse

0.226"

0.138"

7/64"

170,000

ASTM A574

Black-Oxide Alloy Steel

6-32

7/8"

Fully Threaded

__

Coarse

0.226"

0.138"

7/64"

170,000

ASTM A574

Black-Oxide Alloy Steel

6-32

1"

Fully Threaded

__

Coarse

0.226"

0.138"

7/64"

170,000

ASTM A574

Black-Oxide Alloy Steel

6-32

1 1/8"

Fully Threaded

__

Coarse

0.226"

0.138"

7/64"

170,000

ASTM A574

Black-Oxide Alloy Steel

6-32

1 1/4"

Fully Threaded

__

Coarse

0.226"

0.138"

7/64"

170,000

ASTM A574

Black-Oxide Alloy Steel

6-32

1 1/4"

Partially Threaded

3/4"

Coarse

0.226"

0.138"

7/64"

170,000

ASTM A574

Black-Oxide Alloy Steel

6-32

1 3/8"

Partially Threaded

3/4"

Coarse

0.226"

0.138"

7/64"

170,000

ASTM A574

Black-Oxide Alloy Steel

6-32

1 1/2"

Partially Threaded

3/4"

Coarse

0.226"

0.138"

7/64"

170,000

ASTM A574

Black-Oxide Alloy Steel

6-32

1 5/8"

Partially Threaded

3/4"

Coarse

0.226"

0.138"

7/64"

170,000

ASTM A574

Black-Oxide Alloy Steel

6-32

1 3/4"

Partially Threaded

3/4"

Coarse

0.226"

0.138"

7/64"

170,000

ASTM A574

Black-Oxide Alloy Steel

6-32

1 7/8"

Partially Threaded

3/4"

Coarse

0.226"

0.138"

7/64"

170,000

ASTM A574

Black-Oxide Alloy Steel

6-32

2"

Partially Threaded

3/4"

Coarse

0.226"

0.138"

7/64"

170,000

ASTM A574

Black-Oxide Alloy Steel

6-32

2 1/4"

Partially Threaded

3/4"

Coarse

0.226"

0.138"

7/64"

170,000

ASTM A574

Black-Oxide Alloy Steel

6-32

2 1/2"

Partially Threaded

3/4"

Coarse

0.226"

0.138"

7/64"

170,000

ASTM A574

Black-Oxide Alloy Steel

6-32

2 3/4"

Partially Threaded

3/4"

Coarse

0.226"

0.138"

7/64"

170,000

ASTM A574

Black-Oxide Alloy Steel

6-32

3"

Partially Threaded

3/4"

Coarse

0.226"

0.138"

7/64"

170,000

ASTM A574

Black-Oxide Alloy Steel

6-32

3 1/2"

Partially Threaded

3/4"

Coarse

0.226"

0.138"

7/64"

170,000

ASTM A574

Black-Oxide Alloy Steel

6-32

4"

Partially Threaded

3/4"

Coarse

0.226"

0.138"

7/64"

170,000

ASTM A574

Black-Oxide Alloy Steel

6-32

1/8"

Fully Threaded

__

Coarse

0.226"

0.138"

7/64"

170,000

ASTM A574

Zinc-Plated Alloy Steel

6-32

3/16"

Fully Threaded

__

Coarse

0.226"

0.138"

7/64"

170,000

ASTM A574

Zinc-Plated Alloy Steel

6-32

1/4"

Fully Threaded

__

Coarse

0.226"

0.138"

7/64"

170,000

ASTM A574

Zinc-Plated Alloy Steel

6-32

5/16"

Fully Threaded

__

Coarse

0.226"

0.138"

7/64"

170,000

ASTM A574

Zinc-Plated Alloy Steel

6-32

3/8"

Fully Threaded

__

Coarse

0.226"

0.138"

7/64"

170,000

ASTM A574

Zinc-Plated Alloy Steel

6-32

7/16"

Fully Threaded

__

Coarse

0.226"

0.138"

7/64"

170,000

ASME B18.3, ASTM A574

Zinc-Plated Alloy Steel

6-32

1/2"

Fully Threaded

__

Coarse

0.226"

0.138"

7/64"

170,000

ASTM A574

Zinc-Plated Alloy Steel

6-32

5/8"

Fully Threaded

__

Coarse

0.226"

0.138"

7/64"

170,000

ASTM A574

Zinc-Plated Alloy Steel

6-32

3/4"

Fully Threaded

__

Coarse

0.226"

0.138"

7/64"

170,000

ASTM A574

Zinc-Plated Alloy Steel

6-32

7/8"

Fully Threaded

__

Coarse

0.226"

0.138"

7/64"

170,000

ASTM A574

Zinc-Plated Alloy Steel