Value Collection CNFI5112-015BX Castle Lock Nut 1-1/8-12

Product Description

The VALUE COLLECTION CNFI5112-015BX is a castle lock nut sized 1-1/8-12, manufactured from Grade 5 steel with a bright uncoated finish. Castle lock nuts feature slotted castellations at the top that accept a cotter pin or safety wire, mechanically preventing the nut from loosening under vibration or dynamic loading. This fastener uses a right-hand thread and conforms to ANSI B18.2.2 standards. It stands 1-5/32 inches high with a 1-11/16 inch width across flats. Mechanics, millwrights, and maintenance technicians install these in drivetrain assemblies, heavy equipment, agricultural machinery, and anywhere a positive locking fastener is required.

This castle lock nut is suited for inch-measurement fastening applications in industrial, commercial, and heavy equipment environments. The 1-1/8-12 thread designation indicates a 1-1/8 inch nominal diameter with 12 threads per inch, a fine-thread pitch that provides greater thread engagement and resistance to loosening compared to coarse-thread alternatives. Applications include axle and spindle retention, hydraulic cylinder rod ends, and structural fastening where vibration is a recurring service concern. This nut is sold and packaged individually.

Key Features

• Castellated top profile accepts cotter pin or safety wire for positive mechanical locking
• Grade 5 steel construction provides reliable tensile and proof-load strength for demanding applications
• Fine-thread 1-1/8-12 pitch improves thread engagement and torque retention
• Right-hand thread direction for standard installation with conventional tooling
• Bright uncoated finish — suitable for applications where additional coating is applied in the field or coating is not required
• Conforms to ANSI B18.2.2 fastener standard for dimensional consistency

Compatibility

Designed as an OEM-style replacement or service fastener for applications requiring a 1-1/8-12 inch-series castle lock nut meeting ANSI B18.2.2 dimensional requirements.

Installation Notes

Installation is performed by qualified mechanics or maintenance technicians using an appropriately sized open-end or box wrench matched to the 1-11/16 inch across-flats dimension. Always relieve load and de-energize or immobilize the assembly before removing or replacing fasteners in rotating or pressure-bearing systems. After torquing to the assembly specification, align the castellation slots with the cotter pin hole and insert a properly sized cotter pin or safety wire to complete the positive lock. Never reuse a cotter pin once it has been bent into service.