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McMaster 91257A640 Zinc Yellow-Chromate Plated Hex Head Screw, Grade 8 Steel, 3/8"-16 Thread, 4" Long, Partially Threaded, Pack of 10
McMaster 91257A640 Zinc Yellow-Chromate Plated Hex Head Screw, Grade 8 Steel, 3/8"-16 Thread, 4" Long, Partially Threaded, Pack of 10
McMaster 91257A640 Zinc Yellow-Chromate Plated Hex Head Screw, Grade 8 Steel, 3/8"-16 Thread, 4" Long, Partially Threaded, Pack of 10
McMaster 91257A640 Zinc Yellow-Chromate Plated Hex Head Screw, Grade 8 Steel, 3/8"-16 Thread, 4" Long, Partially Threaded, Pack of 10
McMaster 91257A640 Zinc Yellow-Chromate Plated Hex Head Screw, Grade 8 Steel, 3/8"-16 Thread, 4" Long, Partially Threaded, Pack of 10
McMaster 91257A640 Zinc Yellow-Chromate Plated Hex Head Screw, Grade 8 Steel, 3/8"-16 Thread, 4" Long, Partially Threaded, Pack of 10
McMaster 91257A640 Zinc Yellow-Chromate Plated Hex Head Screw, Grade 8 Steel, 3/8"-16 Thread, 4" Long, Partially Threaded, Pack of 10
McMaster 91257A640 Zinc Yellow-Chromate Plated Hex Head Screw, Grade 8 Steel, 3/8"-16 Thread, 4" Long, Partially Threaded, Pack of 10
McMaster 91257A640 Zinc Yellow-Chromate Plated Hex Head Screw, Grade 8 Steel, 3/8"-16 Thread, 4" Long, Partially Threaded, Pack of 10
McMaster 91257A640 Zinc Yellow-Chromate Plated Hex Head Screw, Grade 8 Steel, 3/8"-16 Thread, 4" Long, Partially Threaded, Pack of 10
McMaster 91257A640 Zinc Yellow-Chromate Plated Hex Head Screw, Grade 8 Steel, 3/8"-16 Thread, 4" Long, Partially Threaded, Pack of 10
McMaster 91257A640 Zinc Yellow-Chromate Plated Hex Head Screw, Grade 8 Steel, 3/8"-16 Thread, 4" Long, Partially Threaded, Pack of 10
McMaster 91257A640 Zinc Yellow-Chromate Plated Hex Head Screw, Grade 8 Steel, 3/8"-16 Thread, 4" Long, Partially Threaded, Pack of 10
McMaster 91257A640 Zinc Yellow-Chromate Plated Hex Head Screw, Grade 8 Steel, 3/8"-16 Thread, 4" Long, Partially Threaded, Pack of 10
McMaster 91257A640 Zinc Yellow-Chromate Plated Hex Head Screw, Grade 8 Steel, 3/8"-16 Thread, 4" Long, Partially Threaded, Pack of 10
McMaster 91257A640 Zinc Yellow-Chromate Plated Hex Head Screw, Grade 8 Steel, 3/8"-16 Thread, 4" Long, Partially Threaded, Pack of 10
McMaster 91257A640 Zinc Yellow-Chromate Plated Hex Head Screw, Grade 8 Steel, 3/8"-16 Thread, 4" Long, Partially Threaded, Pack of 10
McMaster 91257A640 Zinc Yellow-Chromate Plated Hex Head Screw, Grade 8 Steel, 3/8"-16 Thread, 4" Long, Partially Threaded, Pack of 10
McMaster 91257A640 Zinc Yellow-Chromate Plated Hex Head Screw, Grade 8 Steel, 3/8"-16 Thread, 4" Long, Partially Threaded, Pack of 10
McMaster 91257A640 Zinc Yellow-Chromate Plated Hex Head Screw, Grade 8 Steel, 3/8"-16 Thread, 4" Long, Partially Threaded, Pack of 10
McMaster 91257A640 Zinc Yellow-Chromate Plated Hex Head Screw, Grade 8 Steel, 3/8"-16 Thread, 4" Long, Partially Threaded, Pack of 10
McMaster 91257A640 Zinc Yellow-Chromate Plated Hex Head Screw, Grade 8 Steel, 3/8"-16 Thread, 4" Long, Partially Threaded, Pack of 10

McMaster 91257A640 Zinc Yellow-Chromate Plated Hex Head Screw, Grade 8 Steel, 3/8"-16 Thread, 4" Long, Partially Threaded, Pack of 10

UPC: | Harmonization / Schedule B : 7318.15.9000

Country of Origin: Canada | Shipping Weight: 1.34 lbs

$63.02 - $63.02
$63.02
$63.02 - $63.02
$63.02

Our most popular hex head screws. These have a head with six flat sides to keep wrenches and sockets from slipping and rounding off the drive.

High-Strength Fastener—Commonly used to fasten components in valves, pumps, motors, and other high-stress applications. These screws have a tensile strength of 125,000 to 160,000 psi.

Zinc-Yellow-Chromate-Plated Steel—With slightly better corrosion resistance than zinc-plated steel screws, these stand up to more frequent exposure to moisture.

Thread Direction Right Hand
Hex Head Profile Standard
Fastener Head Type Hex
Drive Style External Hex
Fastener Strength Rating High
Material Zinc-Yellow-Chromate-Plated Steel
Thread Size 3/8"-16
Length 4"
Width 9/16"
Height 15/64"
Threading Partially Threaded
Thread Spacing Coarse
Fastener Strength Grade/Class SAE Grade 8
Tensile Strength 150,000 psi
Hardness Rockwell C33
Minimum Thread Length 1"
Performance High Strength
Screw Size Decimal Equivalent 0.375"
Specifications Met ASME B18.2.1
SAE J429
System of Measurement Inch
Thread Fit Unified Standard Class 2A
Thread Type UNC
Tip Type Flat
Country of Origin Canada
DFARS Compliance Specialty Metals Compliant (252.225-7009)
Export Control Classification Number (ECCN) EAR99
REACH Compliance REACH (EC 1907/2006) (01/21/2025, 247 SVHC) Compliant
RoHS Compliance RoHS 3 (2015/863/EU) Compliant
Schedule B Number 731815.9000
U.S.–Mexico–Canada Agreement (USMCA) Qualifying Yes