MS21044N5 – Aerospace Self-Locking Hex Nut (5/16-24 UNJF-3B)
Overview
The MS21044N5 is a precision-engineered, self-locking hex nut designed for critical aerospace applications. Featuring a 5/16-24 UNJF-3B thread, this nut incorporates a non-metallic nylon insert to provide prevailing torque locking, ensuring secure fastening in high-vibration environments. Manufactured from cadmium-plated steel, it offers excellent corrosion resistance and is suitable for use in temperatures up to 250°F (121°C).
Technical Specifications
- Thread Size: 5/16-24 UNJF-3B
- Material: Cadmium-plated steel
- Locking Mechanism: Nylon insert (non-metallic)
- Temperature Rating: Up to 250°F (121°C)
- Height: 0.271 to 0.36 inches
- Width Across Flats: 0.492 to 0.502 inches
- Standards: Conforms to MS21044 series specifications
Key Features
- Secure Locking: The nylon insert provides a reliable self-locking feature, preventing loosening due to vibration or torque.
- Corrosion Resistance: Cadmium plating enhances durability and resistance to corrosion, extending the service life of the nut.
- Aerospace Grade: Meets stringent military and aerospace standards, ensuring reliability in critical applications.
- Versatile Application: Suitable for use in various aerospace assemblies, including airframes, engines, and control systems.
Applications
The MS21044N5 self-locking nut is commonly used in:
- Aircraft structural assemblies
- Engine components
- Control systems
- Landing gear mechanisms
- Other high-vibration aerospace applications
Order the MS21044N5 Today
Ensure the integrity of your aerospace assemblies with the MS21044N5 self-locking hex nut. Its reliable locking mechanism and corrosion-resistant construction make it an ideal choice for critical applications. Available now for immediate purchase.
Description: NUT, SELF-LOCKING NUT
Part number: MS21044N5
Alternate part number: AN365-524A, MS20365-524
NUT-LOCK SELF .31-24
Nut - 5/16-24 Thread, Self-Locking Nut, Regular Height, Cadmium Plated Steel, Nylon Insert, 250°,
MS21044N5 SPECIFICATIONS
| Parameter | Characteristics | |
| Thread Class | 3B | |
| Thread Direction | Right-hand | |
| Locking Feature | Prevailing torque with nonmetallic insert | |
| Lubrication | Soluble lubricant | |
| Nut Style | Hexagon | |
| Nut Height | 0.271 inches minimum and 0.360 inches maximum | |
| Width Across Flats | 0.492 inches minimum and 0.502 inches maximum | |
| Temp Rating | 250.0 deg fahrenheit nominal | |
| Thread Series | UNJF | |
| Thread Quantity per Inch | 24 | |
| Nominal Thread Size | 0.312 inches | |
| Countersink Angle | 88.0 degrees nominal nut | |
| Bearing Surface Type | Chamfered or washer faced | |
| Bearing Surface Finish | 125.0 microinches | |
| Material | Steel comp 1006 nut or steel comp 1008 nut or steel comp 1009 nut or steel comp 1010 nut or steel comp 1015 nut or steel comp 1018 nut or steel comp 1035 nut or steel comp 11L37 nut or steel comp 1213 nut or steel comp 12L14 nut | |
| Surface Treatment | Cadmium nut and chromate nut | |
| Surface Treatment Document and Classification | QQ-P-416, ty 2, cl 3 fed spec single treatment response overall except insert |
MS21044N5 Used on Aircraft Engines Oil Sump, Alternator/Generator, Accessory Case, Fuel Injection System, Exhaust/Turbo Charger.
Engine models:
Continental Motors
- •O200 (-A,-B,-D,-X)
- •O300 (-A,-C,-D)
- •O470M
- •IO240 (-A,-B)
- •IO360 (-A,-AB,-AF,-C,-CB,-D,-DB,-D,-DB,-ES,-G,-GB,-H,-HB,-J,-JB,-K,-KB)
- •IO470 (-D,-F,-U,-V,-VO)
- •IOF240B
- •LTSIO360 (-E,-EB,-KB,-RB)
- •TSIO360 (-A,-AB,-C,-CB,-D,-DB,-E,-EB,-F,-FB,-H,-HB,-JB,-KB,-LB,-MB,-RB,-SB)
- •TSIO520BE
- •TSIO550 (-A,-B,-C,-E,-G,-J)
- •TSIO550 (-K,-D,-J,-K)
This part is used on the following aircraft:
- •Dassault Falcon 7X
- Baron Series B55, E55, 58 or G58
- Bonanza 36
- Caravan or Grand Caravan EX
- Citation CJ1 or CJ1+
- Citation CJ2 or CJ2+
- Citation CJ3 or CJ3+
- Citation CJ4
- Citation III, VI or VII
- Citation M2
- Citation V, Ultra, Encore or Encore+
- Citation X
- Citation X+
- Citation XLS, XLS+ or XLS Gen2
- King Air 350 or 350C FM-1 to FM-35
- King Air 360, 350i or 350C FM-36 & on
- King Air B200, B200T, B200C or B200CT
- King Air C90, C90A, C90GT or E90
- King Air C90GTi Series
- Skylane