MS21059L4 Cadmium-Plated Steel Self-Locking Nut, 1⁄4-28 Thread Size

The MS21059L4 is a two lug floating anchor nut designed for high-performance applications. Made from heat-treated, cadmium-plated steel with a dry film lubricant, it features a high-temperature counterbore that prevents shimming and bottoming on imperfect threads. This innovative design allows for effective engagement of threads, even in cases of bolt hole misalignments, ensuring reliable fastening in critical environments.

Features
• Heat-treated, cadmium-plated steel construction
• High-temperature counterbore to eliminate shimming
• Designed for bolt hole misalignment engagement

Benefits
• Enhanced durability and corrosion resistance
• Improved installation efficiency and reliability
• Versatile application in various high-stress environments

Specifications
• Dash Number: L4
• Width: 0.35 to 0.516 in
• Finish: Cadmium-Plated
• Material: Steel
• Lubrication: Dry Film
• Mounting Hole Center-to-Center: 0.998 to 1.002 in
• Mounting Hole Diameter: 0.098 to 0.103 in
• Mounting Type: Straight Hole
• Number of Holes: 2
• Nut Dimensions: 1.292 in L x 0.281 in H
• Temperature Rating: 450 deg F
• Thickness: 0.032 in
• Thread Class: 3B
• Thread Direction: Right Hand
• Thread Per Inch: 28
• Thread Size: 1/4 in
• Thread Type: UNJF
• Domestic/Import: Import

Technical Information
• FAA-STD Approved
• QQ-P-416 Type 2 Class 2