Military Standard MS21086L4 Steel Dry Filmed Nut, Self-Locking, Plate

The MS21086L4 is as the name states: a self-locking nut plate made of steel. Note: this item, like others in the series, is superseded by NASM21086. More details can be viewed below.

*Unless otherwise noted, values are in inches

• Thread Class: 3B
• Thread Direction: Right-hand
• Locking Feature: Prevailing torque
• Minimum Counterbore Diameter: .254
• Lubrication: Dry film lubricant
• Mounting Hole Diameter: .098 to .103
• Nut Style: Plate
• Maximum Nut Length: .591
• Maximum Nut Height: .281
• Maximum Plate Thickness: .055
• Plate Width Range: .380 to .414
• Minimum Nut Counterbore Depth: .062
• Nut Mounting Provision: Straight holes
• Mounting Hole Arrangement Style: 2 holes
• Distance from Aperture Center to Mounting Hole Center Range: .276 to .286
• Center to Center Distance Between Mounting Holes Along Width Range: .217 to .221
• Nominal Temperature Rating (°F): 450
• Thread Series: UNJF
• Maximum Hardness Rating (Rockwell): 49
• Nominal Thread Size: .250
• Material: Steel
• Surface Treatment Document and Classification: QQ-P-416, Type 1, Class 3