The Gripco® Grade A Crownlock Nuts are manufactured from low carbon steel to meet Grade 2 performance specifications. These prevailing torque nuts are designed for use with Grade 2 bolts.

• No markings are required for a Grade A prevailing torque nut.
• Parts are furnished with a cadmium and wax finish or as requested.
• Gripco® Crownlock Nuts meet or exceed all current I.F.I. specifications.
• Prices and samples are available upon request.

The Gripco® Grade B Crownlock Nuts are manufactured from low carbon steel and processed to meet Grade 5 performance specifications. These prevailing torque nuts are designed for use with Grade 5 bolts.

• Three dots at 120 degree intervals on the crown of the nut identify this product as a Grade B prevailing torque nut.
• Parts are furnished with a cadmium and wax finish or as requested.
• Gripco® Crownlock Nuts meet or exceed all current I.F.I. specifications.
• Prices and samples are available upon request.

The Gripco® Grade C Crownlock Nuts are manufactured from medium carbon steel and heat treated to meet Grade 8 performance specifications. These prevailing torque nuts are designed for high strength applications for use with Grade 8 bolts.

• Six dots at 60 degree intervals on the crown of the nut identify this product as a Grade C prevailing torque nut.
• Parts are furnished with a cadmium and wax finish or as requested.
• Gripco® Crownlock Nuts meet or exceed all current I.F.I. specifications.
• Prices and samples are available upon request.

The Gripco® Grade G Crownlock Flange Nuts are manufactured from medium carbon steel and heat treated to meet Grade G performance specifications. Greater height and the added hoop strength of the flange provide 30% more strength than a standard nut, These prevailing torque nuts are designed for high strength applications for use with Grade 8 bolts.

Six dots at 60 degree intervals on the top of the flange identify this product as a Grade G prevailing torque flange nut.

• Parts are furnished with a cadmium and wax finish or as requested.
• Gripco® Crownlock Flange Nuts meet or exceed all current I.F.I. specifications.
• Prices and samples are available upon request.

Metric Crownlock Nuts

The Gripco® Class 9 Metric Crownlock Nuts are manufactured from low carbon steel to meet Class 9 performance specifications. These prevailing torque nuts are designed for use with Class 9.8 bolts.

The Gripco® Metric Crownlock Flange Nuts are manufactured from low carbon steel to meet Class 9 performance specifications. Greater height and the added hoop strength of the flange provide 30% more strength than a standard nut. These prevailing torque nuts are designed for use with Class 9.8 bolts.

• The numeral 9 on the crown of the nut identifies this part as a Class 9 nut.
• Parts are furnished with a cadmium and wax finish or as requested.
• Gripco® Metric Crownlock Nuts meet or exceed all current A.N.S.I. specifications.
• Prices and samples are available upon request.

The Gripco® Class 10 Metric Crownlock Nuts are manufactured from medium carbon steel and heat treated to meet Class 10 performance specifications. These prevailing torque nuts are designed for use with Class 10.9 bolts, The numeral 10 on the crown of the nut identifies this part as a Class 10 nut.

The Gripco® Metric Crownlock Flange Nuts are manufactured from medium carbon steel and heat-treated to meet Class 10 performance specifications. Greater height and the added hoop strength of the flange provide 30% more strength than a standard nut. These prevailing torque nuts are designed for use with Class 10.9 bolts.

• Parts are furnished with a cadmium and wax finish or as requested.
• Gripco® Metric Crownlock Nuts meet or exceed all current A.N.S.I. specifications.
• Prices and samples are available upon request.