Approved Vendor

Mil. Spec. Internal-Tooth Lock Washer

Manufacturer part: 96551A120

These washers are manufactured and tested to strict U.S. military standards for material and construction. They resist vibration better 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.Wear-Resistant 410 Stainless Steel—These grip hard material better than other types of stainless steel. They are not as corrosion resistant as 18-8 and 316 stainless steel, so they are best for environments that experience occasional moisture.

✓ Normalized specifications✓ Supplier verified
Availability
In stock
Lead time
Contact supplier
Sold by
Approved Vendor

Technical data

Specifications

Normalized product attributes for faster comparison and sourcing.

ID
0.332"
OD
0.610"
ECCN
EAR99
Hardness
Rockwell C40 to Rockwell C50
Material
410 Stainless Steel
Thickness
0.028" to 0.034"
Performance
Corrosion Resistant, Wear Resistant
Washer Type
Tooth
Certification
Mil. Spec.
For Screw Size
5/16,"
Tooth Location
Internal
RoHS Compliance
RoHS 3 (2015/863/EU) Compliant
DFARS Compliance
Not Specialty Metals Compliant
REACH Compliance
REACH (EC 1907/2006) (06/14/2023, 235 SVHC) Compliant
USMCA Qualifying
No
Country of Origin
Taiwan
Schedule B Number
731821.0000
Specifications Met
ASME B18.21.1, NASM35333
System of Measurement
Inch
Military Specification
MS35333-75

Supplier coverage

Compare available offers

Review pricing, availability, and fulfillment details from verified distributors.

SupplierSupplier SKUPriceStockLead timeType
Approved Vendor96551A120$8.26 USDContact supplierContact supplierAuthorized · US distributor

Prices and availability are provided by suppliers and may change.