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Zinc-Plated Steel Internal-Tooth Lock Washer

Manufacturer part: 91150A114

Grip tighter than split lock washers to prevent nuts and screws from loosening in applications with constant movement, such as conveyors. Tooth lock washers typically can't be reused because the teeth often get bent when tightened.Internal Tooth—Internal teeth dig into the nut or screw to prevent it from backing out. Unlike external-tooth lock washers, these have a smooth outside edge, so they are less likely to mar your material or snag on objects. However, they don’t grip quite as well. Pair them with fasteners that have small diameters, such as fillister and cheese head screws.Zinc-Plated Steel—A common choice for areas with occasional exposure to moisture.

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Technical data

Specifications

Normalized product attributes for faster comparison and sourcing.

ID
0.384"
OD
0.747"
ECCN
EAR99
Finish
Zinc Plated
Hardness
Rockwell C44
Material
Steel
Thickness
0.040" to 0.050"
Performance
High Strength
Washer Type
Tooth
For Screw Size
3/8,"
Tooth Location
Internal
RoHS Compliance
RoHS 3 (2015/863/EU) Compliant
DFARS Compliance
Specialty Metals COTS-Exempt
REACH Compliance
REACH (EC 1907/2006) (06/27/2024, 241 SVHC) Compliant
USMCA Qualifying
No
Country of Origin
United States
Schedule B Number
731821.0000
Specifications Met
ASME B18.21.1
System of Measurement
Inch
Fastener Strength Rating
High
Fastener Strength Grade/Class
SAE Grade 8
For Fastener Strength Grade/Class
SAE Grade 8

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