Attributes

Brand	-
Category	Standard Parts, Components & Industrial Consumables / Washers
Origin	-
Material	304 Stainless Steel
Surface Finish	Iron Black Coating
Standard	GB858
Design Type	Six-Prong Crab Locking Plate
Function	Anti-Rotation for Round Nuts
Compatibility	Round Slotted Nuts
Corrosion Resistance	High (Suitable for Outdoor Use)
Hardness	Enhanced Durability
Application	Machinery, Automotive, and Industrial Equipment
Package Content	10 Pieces per Pack

6 reviews

Anonymous

Mar 28, 2026

Rating: 5/5

Perfect fit for my lathe project

These washers fit the round nuts on my lathe spindle perfectly. The black finish looks professional and the six prongs provide excellent locking power.

Anonymous

Mar 26, 2026

Rating: 5/5

Exactly as described

Matches the GB858 standard precisely. The prongs bend easily enough to secure the nut but are strong enough to hold it tight.

Anonymous

Mar 26, 2026

Rating: 4/5

Great value for money

Bought these for a custom bike build. They work great and the price was much better than local hardware stores. Shipping was fast too.

Anonymous

Mar 25, 2026

Rating: 5/5

Reliable locking mechanism

Very satisfied with the purchase. The crab design allows for multiple locking angles which made alignment much easier during assembly.

Anonymous

Mar 11, 2026

Rating: 4/5

Good quality steel

The 304 stainless steel feels very sturdy. I deducted one star only because the black coating scratched slightly during installation, but it doesn't affect performance.

Anonymous

Mar 09, 2026

Rating: 5/5

Excellent anti-rotation capability

I use these on a vibrating motor assembly. They have not loosened once since installation. Highly recommended for high-vibration environments.

5 FAQ

Q: Can I reuse these washers after removing them?

A: While the stainless steel is durable, the prongs are designed to be bent to lock the nut. Reusing them may result in reduced locking tension. We recommend using new washers for critical safety applications.

Q: What tools are needed to install these?

A: You typically need a flat-head screwdriver or a small punch tool to bend the six prongs into the slots of the round nut after tightening.

Q: What size round nuts are these compatible with?

A: These washers are designed according to the GB858 standard. Please check the specific inner diameter measurement in the size chart to match your round nut dimensions.

Q: Do these come with the round nuts or just the washers?

A: This product listing is for the anti-rotation tab washers only. Round slotted nuts must be purchased separately.

Q: Is the black coating durable against rust?

A: Yes, the base material is 304 Stainless Steel which is naturally rust-resistant. The iron black coating adds an extra layer of protection and aesthetic appeal, making it suitable for most indoor and outdoor applications.

Explore your interests

Honeywell Fresh Air Filter - ERF150/ERF250/ERF350C0N/ERF150D/250D/350D Replacement Filters

$54.00

Chint Claw Hammer, One-Piece Formed Iron Hammer, Tool Nail Hammer, Mini Household Small Hammer Specialized for Woodworking

$5.00

Aluminum Alloy Diaphragm Coupling High Rigidity High Torque SCPS DBJ SCPW Servo Screw Motor Coupling

$28.80

Mold Support Pins SKD61; Three-stage Support Rods; Two-stage Mold Ejector Pins; Heat-resistant Stepped Push Rods with Head; Secondary Support Pins

$5.80

Iron Galvanized Spring Washer Split Spring Washer Metal Elastic Shim M3 M4 M5 M6 M8 M10 M12 M14 M16 M20

$3.60

Bronze Rings Bronze Bushings Bronze Washers and Gaskets Bronze Sleeves Lathe Machined 2.5/3/4/5/6/8/10/12 Customizable

$1.50

Beech Wood Two-Piece Cleaver Handle Accessories, Household Fixed Guard, Handmade Knife Rivet Handle Replacement, Solid Wood Handle

$3.51

Xingchen Oil-Water Separator Filter AC2010-02D, Automatic Drain Two-Component Unit AC3010-03/AC4010

$8.00

Universal Joint Cross Bearing - Sizes 20x45, 22x55, 20x55

$19.00

Figure-8 Coupling GB Encoder Shaft Connector Polyurethane TPU Flexible Plastic Elastic Shaft Sleeve

$13.00

Heavy-Duty Double Steel Wire Tiger Clamp Galvanized Strong Hose Clamp for Pipes Hoses Water Oil Tubes Stainless Steel Band Clamp

$2.60

European Standard Aluminum Profile T-Slot Nuts, Carbon Steel Square Nuts for Types 20, 30, 40, 45 (M3/M4/M5)

$0.55

Custom Non-standard Parts

$650.00

GA/GB Precision Guide Bushing Inner Small Guide Post Stamping Hardware Mold Wear-Resistant 8 10 12 14 16 18 20 25

$3.20

Aotian Extreme 24-25 BURTON STEP ON GENESIS Men's Dual Highback Step-On Snowboard Bindings

$2,288.50

Cungang Micro Ball Guide Pillar and Sleeve, Precision Micro Ball Bushing Guide Assembly, Bronze Bushing, FA Automation Bearing

$60.00

Jinchao Grade 12.9 Socket Set Screws Pointed Machine Screws Headless Grub Screws M3 M4 M5 M6-M16

$0.92

CNC Lathe 0640 Chuck Saw 4-Cut Non-Quenched Round Through Hole 3-46 Internal Thread M48x1.5 Spindle

$20.00

304 Stainless Steel Extension Spring with S-Hook, Strong Curved Hook, Various Sizes and Lengths, Customizable for Oven Door Pull Springs

$1.00

Micro HK Needle Roller Bearing Assortment, Inner Diameters 3, 4, 5, 6, 7, 8, 9, 10, 12, 14, 15, 16, 17-40mm

$0.58

In Stock Kaisite Solenoid Valve DG4V-5-2C-FW-H-60H 0C 6C 33C 8C 7C

$820.00

Sliding Bar Socket Extension Bar Power Bar Sliding Bar Large 1/2 Medium 3/8 Small 1/4 Fly Rail Tube Wrench Extension Bar Sliding Rod Tool

$3.25

Rotary Worktable Vertical and Horizontal Dual-Use Indexing Plate High-Precision CNC Milling Machine Rotary Table Indexing Head TS TSL

$2,155.00

Flat Pressure Thrust Ball Bearings 51200 51201 51202 51203 51204 51205 51206

$4.60

M20 National Standard Turnbuckle, Malleable Iron Screw Rigging, Spiral Buckle, Galvanized Flower Lantern Bolt, Utility Pole Wire Rope Tensioner

$10.80

M6 M8 M10 M12 M14 M16 Stainless Steel 304 Round Head Rivets GB867 Knock-in Mushroom Head Solid Sign Rivets

$2.43

Hammer Drill Adapter Chuck: Universal Connector for Rotary Hammers and Hand Drills, Compatible with Round Shank (Two Grooves) and Square Shank (Four Grooves)

$5.04

Precision Ball Guide Pillar and Bushing, Rolling Types 20 22 25 28 32 38 SRP TRP SGP Mold Accessories

$28.00

Wear-Resistant Double-Sided Dustproof Wire Grommet Round Cable Bushing Ring for Chassis Rubber Seal

$20.80

400kg 600kg 800kg High-Power Electric Vacuum Suction Cup, Construction Site Building Glass Handling Vacuum Lifting Machine

$5,664.00

TWSNS Taizhuan Shannais Oil-Water Separator Filter Self-Adjusting Pressure Valve Air Source Treatment Two-Piece Unit Pressure Reducing Valve

$11.00

Heavy-Duty Universal Caster Wheels, Silent Load-Bearing Rollers with Brakes, Directional Swivel Wheels for Trolleys, Furniture Moving Base

$2.13

Heavy-Duty Swivel Caster Polyurethane 4568 Inch Push Cart Plate Cart Cargo Wheel Wear-Resistant Steering Wheel Brake Wheel

$4.27

Galvanized Iron Thickened Split Lock Washer with Wide Flat Washer, Elastic Metal Shim M5 M6 M8 M10 M20

$1.47

Sliding Bar 1 Inch Heavy Duty 1/2 Sliding Bar Socket Extension Bar 1/4 3/8 4 Extended Bar Long Adapter Connector

$9.95

Air Source Processor Two-Piece Unit (BFR2000, BFC2000/3000/4000), Pressure Regulating Oil-Water Separator

$45.00

304 Stainless Steel Cross Countersunk Head Screws, Flat Head Machine Bolts, Assorted Electronic Small Screws M2/M3/M4/M5/M6

$1.10

Composite Washer External Hex Drill Tail Self-Tapping Screws for Color Steel Roofing Tiles, National Standard with Washer

$24.00

Custom Helical Gears for Reducers - Non-Standard Cylindrical Spiral Gears with Left/Right Hand Rotation, Module 1-20, 45-Degree Helix Angle

$10.00

Hammer Nut Hammer Head Cap Furniture Two-in-One Connector Cylinder Hammer Embedded Hex Socket Screw Cap M6 M8

$3.00