#4-40 x 3" Socket Head Cap Screws, Full Thread / Alloy Steel / Thermal Black Oxide / Made in USA / DFAR Compliant
- Steel
- Thermal Black Oxide
- 40 TPI · Coarse
- ASME B18.3, ASTM F835
$1,970.08
$19.70 / pc
Package of 100
Volume pricing: the bulk box price per piece is shown above. Need more? Request a quote →
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Product Description
#4-40 x 3" Socket Head Cap Screws, Full Thread / Alloy Steel / Thermal Black Oxide / Made in USA / DFAR Compliant
RoHS Compliant🇺🇸 Made in USA
Frequently Asked Questions
What hex key size do I need for this socket head cap screw?
Hex socket size depends on the screw thread size. Common sizes: #6 uses 7/64", #8 uses 9/64", #10 uses 5/32", 1/4" uses 3/16", 5/16" uses 1/4", 3/8" uses 5/16". For metric: M3 uses 2.5mm, M5 uses 4mm, M6 uses 5mm, M8 uses 6mm, M10 uses 8mm.
Does Black Oxide finish provide corrosion protection?
Black Oxide provides mild corrosion resistance through a controlled oxidation process. It is dimensionally stable (no plating buildup), will not chip or flake, and is suitable for indoor use. For outdoor or wet environments, additional oil coating or a different finish (zinc, stainless) is recommended.
$1,970.08
$19.70/pc
Socket Head Cap Screw, Full Thread (Usa) / Alloy Steel / Black Oxide
Family: 430
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Technical Specifications
Thread Size
#4-40
Length
3"
Thread Type
Coarse
Material
Steel
Finish
Thermal Black Oxide
Drive
Hex Socket (Allen)
Head Style
Socket Head
Standard
ASME B18.3, ASTM F835
Country of Origin
USA
Thread Pitch
40 TPI
Thread Class
Coarse
Tensile Strength
180000
Hardness
C37 - C45
RoHS Compliance
RoHS Compliant
Measurement System
Inch
SKU
430126-100
Compliance & Certifications
DFARS Compliant
Defense Acquisition Regulations
Need documentation? Request compliance certificates