#4 Medium Split Lock Washers / Low Carbon Steel / Black Oxide
- Steel
- Black Oxide
- ASME B18.21.1
$296.10
$0.099 / pc
Package of 3000
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Product Description
#4 Medium Split Lock Washers / Low Carbon Steel / Black Oxide
RoHS Compliant
Frequently Asked Questions
Are lock washers effective at preventing loosening?
Modern engineering testing shows split lock washers can actually reduce clamp load under vibration. For critical applications, use nylon insert lock nuts or thread locker (Loctite). Tooth lock washers (internal/external star) typically perform better than split washers in vibration-prone applications.
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.
$296.10
$0.099/pc
Medium Split Lock Washers / Steel / Black Oxide
Family: WSB
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Technical Specifications
Thread Size
#4
Material
Steel
Finish
Black Oxide
Thread Direction
Unthreaded
Standard
ASME B18.21.1
Country of Origin
Import
Washer Type
Medium
Inside Diameter
0.115"
Outer Diameter
.209"
Thickness
.025"
RoHS Compliance
RoHS Compliant
Measurement System
Inch
SKU
04WSB-3000