Part Number: NAS1351
Function: Socket Head Cap Screw
Manufacturer: Aerospace Industries Association
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Description
The NAS1351 is a high-strength socket head cap screw standardized by the Aerospace Industries Association, typically manufactured from alloy or corrosion-resistant steel for demanding mechanical applications. It features UNRF-3A threads and is designed to meet stringent aerospace fastener specifications, including optional self-locking elements with specific head markings. This fastener is widely used in aerospace structures, high-reliability assemblies, and precision mechanical systems.
Features
- Socket head cap screw design for high torque applications
- Manufactured according to aerospace NAS standards
- UNRF-3A thread form for high-strength fastening
- Optional self-locking element with six-dot head marking identification
- Available in alloy, corrosion-resistant, and heat-resistant steel
- Designed for high reliability and structural integrity
Design Notes
- Ensure correct torque specification based on material and thread size
- Self-locking versions require inspection of head marking (six dots)
- Material selection should match environmental and thermal requirements
- UNRF threads provide improved fatigue resistance in high-stress joints
- Proper lubrication or coating may be required to prevent galling
Typical Circuit Usage
- Mechanical fastening in aerospace assemblies
- High-strength structural joints
- Precision equipment mounting
- Vibration-resistant fastening with self-locking variants
- High-temperature mechanical assemblies
How to Choose This Part
- Select based on required strength and environmental conditions
- Choose appropriate material (alloy, stainless, heat-resistant)
- Verify thread compatibility (UNRF-3A) with mating components
- Determine if self-locking feature is necessary
- Consider corrosion resistance and temperature exposure
Applications
- Aerospace structural assemblies
- Aircraft engine components
- Defense and military equipment
- High-reliability industrial machinery
- Precision mechanical systems
Alternative / Equivalent Products
- NAS1352 socket head cap screw (fine thread variant)
- MS16995 aerospace socket head screw
- AN500 series machine screws
- ISO 4762 metric socket head cap screws
- ASTM A574 high-strength socket head screws
NAS1351 Datasheet PDF
