The MS27039-4-31 is a military standard flush head machine screw designed for aerospace fastening applications requiring high strength, precision, and long-term reliability. Manufactured in accordance with the MS27039 specification, this fastener is commonly used throughout commercial, military, and general aviation aircraft for securing structural panels, fairings, avionics equipment, access covers, and other critical assemblies.

Featuring a 100° flush countersunk head, the screw sits flush with the mounting surface when installed in a compatible countersunk hole, helping maintain aerodynamic surfaces and preventing interference with adjacent components. Its precision-machined threads provide secure engagement and consistent clamping force, ensuring dependable fastening performance in environments subjected to vibration and cyclic loading.

Manufactured from high-strength aerospace-grade material with a corrosion-resistant finish, the MS27039-4-31 is engineered to withstand demanding operating conditions while providing excellent durability and service life. It is suitable for repeated installation and removal during scheduled maintenance and inspection procedures without compromising fastening integrity when used in accordance with approved maintenance practices.

This product is supplied in a 25-piece pack, making it a convenient solution for aircraft maintenance, repair, and overhaul (MRO) operations requiring multiple OEM-standard fasteners.

Key Features

- Part Number: MS27039-4-31
- Manufacturer: Military Standard (MS)
- Component: Flush Head Machine Screw
- Specification: MS27039 Military Standard
- Head Style: 100° Flush Countersunk
- Construction: Precision-machined aerospace fastener
- Material: High-strength corrosion-resistant aerospace alloy
- Package Quantity: 25 Pieces
- Application: Aircraft structural, avionics, fairing, panel, and general aerospace fastening applications
- Features: Flush installation, high strength, vibration resistance, and OEM-quality performance