MS21042L3 – Military Standard Self-Locking Extended Washer Nut
High-Strength Fastener for Demanding Aerospace Applications
Available now at Airparts.aero.
Product Overview
The MS21042L3 Self-Locking Extended Washer Nut is a high-performance aerospace fastener designed to provide secure and reliable connections in critical aircraft applications. This nut combines a self-locking mechanism with an integrated extended washer, offering enhanced resistance to vibration and loosening during flight. Manufactured to meet rigorous Military Standard (MS) specifications, it is ideal for use in high-stress and high-temperature environments.
Key Features and Benefits
- Self-Locking Mechanism:
Prevents unintentional loosening due to vibration, ensuring secure connections in critical applications. - Integrated Extended Washer:
Provides a larger contact area to evenly distribute load and protect underlying components from damage. - High-Temperature and Stress Resistance:
Engineered to perform reliably under extreme operational conditions. - Lightweight and Durable Construction:
Made from aerospace-grade steel with a protective finish for maximum strength and corrosion resistance without adding unnecessary weight. - Meets Military Standards:
Manufactured in compliance with MS21042 specifications for quality, safety, and performance.
Technical Specifications
- Part Number: MS21042L3
- Thread Size: 10-32 UNF
- Material: Alloy steel, cadmium plated per QQ-P-416, Type II, Class 3
- Washer Diameter: Extended for increased load distribution
- Self-Locking Type: Non-reusable after installation
- Temperature Rating: -65°F to 450°F
- Standards Compliance: MS21042, MIL-N-25027
Applications
The MS21042L3 Self-Locking Extended Washer Nut is ideal for:
- Aircraft Structural Assemblies: Provides secure fastening in airframe and wing structures.
- Engine Components: Ensures reliable connections in high-temperature engine environments.
- Landing Gear Systems: Withstands high stress and vibration during takeoff and landing.
- Avionics and Electronics: Secures sensitive systems without risk of loosening due to vibration.
How the MS21042L3 Enhances Aircraft Performance
This self-locking nut offers superior vibration resistance and load distribution, ensuring that critical components remain securely fastened during operation. Its high strength and lightweight design contribute to improved aircraft performance and reduced maintenance requirements.
Why Choose the MS21042L3 Self-Locking Nut?
- Enhanced Safety and Reliability: Protects against fastener failure, even in high-vibration environments.
- Proven Durability: Withstands extreme operational conditions, reducing the need for frequent replacements.
- Certified Quality: Meets or exceeds Military Standard specifications, ensuring airworthiness and compliance.
Order Your MS21042L3 Nut Today
Ensure your aircraft’s critical connections remain secure with the MS21042L3 Self-Locking Extended Washer Nut. Visit Airparts.aero now to place your order and enjoy competitive pricing, fast shipping, and expert support
Description: Nut, Self-Locking, Extended Washer, thread: 10-32, self locking, reduced hexagon, reduced height, cad plated steel, dry film lubricated, MS21042 series nut
Part Number: MS21042L3
Product Overview:
A nut having 6 flat sides and an integral washer which extends beyond the flats or periphery. An integral feature is incorporated for locking on the threads of a mating member.
MS21042L3 Part Specifications:
| Thread Class | : | 3b | |
| Thread Direction | : | Right-hand | |
| Locking Feature | : | Prevailing Torque All Metal Design | |
| Washer Outside Diameter | : | 0.330" Inches Maximum | |
| Lubrication | : | Dry Film Lubricant | |
| Overall Height | : | 0.154" Inches Minimum And 0.188" Inches Maximum | |
| Nut Style | : | Hexagon | |
| Washer Thickness | : | 0.015" Inches Minimum | |
| Width Across Flats | : | 0.243" Inches Minimum And 0.252" Inches Maximum | |
| Temp Rating | : | 450.0 Deg Fahrenheit Nominal | |
| Thread Series | : | Unjf | |
| Thread Quantity Per Inch | : | 32 | |
| Hardness Rating | : | 49.0 Rockwell C Maximum | |
| Nominal Thread Size | : | 0.190" Inches | |
| Criticality Code Justification | : | Feat | |
| Special Features | : | The Item Is A Flight Safety Critical Aircraft Part (fscap) | |
| Material | : | Steel Overall | |
| Surface Treatment | : | Cadmium Overall And Chromate Overall | |
| Surface Treatment Document And Classification | : | Qq-p-416,ty 2,cl 3 Fed Spec Single Treatment Response Overall |
DESCRIPTION
Military Standard Self-Locking Extended Washer Nut
- Material: Steel, dry film coated
- Surface Treatment: Cadmium and chromate
- Diameter: 0.33 in.
- Height: 0.154 in.
- Thickness: 0.015 in.
NOTES
SUBSTITUTION WITH MS20365-1032 APPLICABLE FOR BEECH 95-B55, E55, 58, 58TC AND G58 ONLY.
Applicable Textron Aircraft
- 1900 Airliner
- 1900C Airliner
- 1900D Airliner
- Baron Series B55, E55, 58 or G58
- Beechjet 400/400A
- Bonanza 36
- Bonanza F33, G33, F33A or F33C
- 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 Latitude
- Citation Longitude
- Citation M2
- Citation Mustang
- Citation Sovereign or Sovereign+
- Citation V, Ultra, Encore or Encore+
- Citation X
- Citation X+
- Citation XLS, XLS+ or XLS Gen2
- King Air 100
- 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 B200GT or B200CGT
- King Air C90, C90A, C90GT or E90
- King Air C90GTi Series
- Premier Model 390
- SkyCourier
- Skyhawk
- Skylane
- Stationair
List not comprehensive, may be applicable on other models.
Between AirParts' branded hardware products, and our Seller's hardware offerings, we have hundreds of thousands of hardware parts in stock.
Note: Verify compatibility with your aircraft’s maintenance manual and consult with a certified aviation technician for proper installation
| Dimensions | |
|---|---|
| Dimensions (W x H x D) | 0.175" x 0.175" x 0.330" Inch |
| Length | 0.330" Inch |
| Weight | 0.002 lb |
| Specifications | |
|---|---|
| ATA Chapter | 51 ATA Standard Practices and Structures |
| Available Conditions | NE/NS |
| Cage Code | 96906 |
| Country of origin | United States of America |
| ECCN / USML | Ear99 |
| Hazmat Code | Not applicable |
| Hazmat(Y/N) | N |
| Material | Steel |
| NSN | 5310-00-807-1474 |
| Schedule B | 7318.16.0085 |
| Total Shelf Life (days) | Not applicable |
| Type | Nut |
| Units of Measure (UoM) | Each |
| Brand | Military Standards |
| Color | Gray |
| Condition status | Depreciated |