Grade C Locknuts

Grade C locknuts, also known as Stover or Top-Lock nuts, are one-piece, all-metal locknuts. They feature a conical crown with slightly distorted elliptical threads that create a tight mechanical grip when torqued. The result is a vibration-resistant connection that holds under heavy loads. These Grade C locknuts are finished with a Clear Cr3 Zinc and Wax coating for improved corrosion resistance.
At Empire Bolt & Screw, we are a trusted national supplier of Grade C locknuts. We stock a wide range of sizes and materials to meet the needs of OEMs, MRO operations, and industrial distributors. Whatever your application, you can count on us to deliver superior-quality Grade C locknuts with fast turnaround and competitive prices.

Order Grade C Locknuts in Bulk or Custom Quantities Today

Browse the options below to order the Grade C Locknuts in the sizes and quantities you need. Questions? Contact us, and our team will assist you in finding the right fasteners for your application.

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Model	Product	Size	Plate
825180	7/16"-20 ALL METAL HEX LOCKNUTS GRADE C MED. CARBON ZINC & WAX CR+3	7/16"-20	ZINC CR+3 & WAX	Add to Quote
825190	1/2"-13 ALL METAL HEX LOCKNUTS GRADE C MED. CARBON ZINC & WAX CR+3	1/2"-13	ZINC CR+3 & WAX	Add to Quote
825200	1/2"-20 ALL METAL HEX LOCKNUTS GRADE C MED. CARBON ZINC & WAX CR+3	1/2"-20	ZINC CR+3 & WAX	Add to Quote
825210	9/16"-12 ALL METAL HEX LOCKNUTS GRADE C MED. CARBON ZINC & WAX CR+3	9/16"-12	ZINC CR+3 & WAX	Add to Quote
825220	9/16"-18 ALL METAL HEX LOCKNUTS GRADE C MED. CARBON ZINC & WAX CR+3	9/16"-18	ZINC CR+3 & WAX	Add to Quote
825230	5/8"-11 ALL METAL HEX LOCKNUTS GRADE C MED. CARBON ZINC & WAX CR+3	5/8"-11	ZINC CR+3 & WAX	Add to Quote
825240	5/8"-18 ALL METAL HEX LOCKNUTS GRADE C MED. CARBON ZINC & WAX CR+3	5/8"-18	ZINC CR+3 & WAX	Add to Quote
825250	3/4"-10 ALL METAL HEX LOCKNUTS GRADE C MED. CARBON ZINC & WAX CR+3	3/4"-10	ZINC CR+3 & WAX	Add to Quote
825260	3/4"-16 ALL METAL HEX LOCKNUTS GRADE C MED. CARBON ZINC & WAX CR+3	3/4"-16	ZINC CR+3 & WAX	Add to Quote
825270	7/8"-9 ALL METAL HEX LOCKNUTS GRADE C MED. CARBON ZINC & WAX CR+3	7/8"-9	ZINC CR+3 & WAX	Add to Quote
825280	7/8"-14 ALL METAL HEX LOCKNUTS GRADE C MED. CARBON ZINC & WAX CR+3	7/8"-14	ZINC CR+3 & WAX	Add to Quote
825290	1"-8 ALL METAL HEX LOCKNUTS GRADE C MED. CARBON ZINC & WAX CR+3	1"-8	ZINC CR+3 & WAX	Add to Quote
825300	1"-14 ALL METAL HEX LOCKNUTS GRADE C MED. CARBON ZINC & WAX CR+3	1"-14	ZINC CR+3 & WAX	Add to Quote
825314	7/16"-14 ALL METAL HEX LOCKNUTS GR.C ZINC & WAX CR+3	7/16"-14	ZINC CR+3 & WAX	Add to Quote
826110	M6-1.00 HEX CONE LOCKNUT CLASS 10 MED. CARBON ZINC & WAX CR+3 DIN 980V	M6-1.00	ZINC CR+3 & WAX	Add to Quote
826130	M8-1.25 HEX CONE LOCKNUT CLASS 10 MED. CARBON ZINC & WAX CR+3 DIN 980V	M8-1.25	ZINC CR+3 & WAX	Add to Quote
826150	M10-1.50 HEX CONE LOCKNUT CLASS 10 MED. CARBON ZINC & WAX CR+3 DIN 980V	M10-1.50	ZINC CR+3 & WAX	Add to Quote
826170	M12-1.75 HEX CONE LOCKNUT CLASS 10 MED. CARBON ZINC & WAX CR+3 DIN 980V	M12-1.75	ZINC CR+3 & WAX	Add to Quote
826190	M14-2.00 HEX CONE LOCKNUT CLASS 10 MED. CARBON ZINC & WAX CR+3 DIN 980V	M14-2.00	ZINC CR+3 & WAX	Add to Quote
826210	M16-2.00 HEX CONE LOCKNUT CLASS 10 MED. CARBON ZINC & WAX CR+3 DIN 980V	M16-2.00	ZINC CR+3 & WAX	Add to Quote
826230	M20-2.50 HEX CONE LOCKNUT CLASS 10 MED. CARBON ZINC & WAX CR+3 DIN 980V	M20-2.50	ZINC CR+3 & WAX	Add to Quote
826250	M24-3.00 HEX CONE LOCKNUT CLASS 10 MED. CARBON ZINC & WAX CR+3 DIN 980V	M24-3.00	ZINC CR+3 & WAX	Add to Quote
826290	M30-3.50 HEX CONE LOCKNUT CLASS 10 MED. CARBON ZINC & WAX CR+3 DIN 980V	M30-3.50	ZINC CR+3 & WAX	Add to Quote
826360	M36-4.00 HEX CONE LOCKNUT CLASS 10 MED. CARBON ZINC & WAX CR+3 DIN 980V	M36-4.00	ZINC CR+3 & WAX	Add to Quote

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Key Benefits of Grade C Locknuts

Features a distorted thread form that resists vibration and loosening
The one-piece, all-metal construction handles heavy loads for long-lasting strength
Maintains clamp load under high stress
Can be reused in certain non-critical applications
Available in a full range of sizing options

Industrial Applications and Industries That Use Grade C Locknuts

Grade C locknuts are used in a wide range of industrial applications that require vibration-resistant fastening. The strength provided by their all-metal construction makes them more durable than other locknut options. Common applications for Grade C locknuts include:

Heavy equipment and industrial machinery
Construction and infrastructure projects
Agricultural equipment
Material handling equipment
Automotive and truck components
Power generation systems

Your Source for Grade C Locknuts and Industrial Fastening Solutions

At Empire Bolt & Screw, we are dedicated to providing industrial professionals nationwide with top-quality fastening solutions. We offer engineering support, quality control, and supply chain expertise to meet your industrial fastening requirements. With custom Vendor Managed Inventory, Kanban, and Just-In-Time programs, we can help you minimize downtime by streamlining your fastener inventory supply processes, keeping you fully stocked with products like Grade C locknuts.

Contact Us Today to Get Grade C Locknuts at Great Prices

Request a quote today or contact our office to discuss your Grade C locknut requirements. Looking for other locknuts? Check out our inventory of nylon insert locknuts, slotted and castle nuts, and custom options. Empire Bolt & Screw is your one-stop supplier for Grade C locknuts.

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Please look around our pages, send us a Request For Quote, or give us a call to discuss how Empire Bolt & Screw can help your company with their fastening needs today!

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