MS21042L4 - Extended Self-Locking Washer Nut

MS21042L4 – Military Standard Extended Self-Locking Washer Nut
High-Strength, Vibration-Resistant Fastener for Aerospace Applications

Available now at Airparts.aero.

Product Overview

The MS21042L4 Extended Self-Locking Washer Nut is a top-tier fastener engineered for demanding aerospace environments. Featuring an integrated extended washer, this nut ensures even load distribution while its self-locking design prevents loosening caused by vibration or thermal expansion. Built to meet stringent Military Standard (MS) specifications, the MS21042L4 provides secure and reliable fastening in critical applications such as airframes, engines, and avionics.

Key Features and Benefits

• Self-Locking Mechanism:
  Prevents fastener loosening due to vibrations, ensuring safety and stability in critical assemblies.
• Integrated Extended Washer:
  Distributes load evenly across a larger surface area, minimizing stress on components and protecting surfaces from damage.
• Aerospace-Grade Durability:
  Made from high-strength alloy steel with a cadmium-plated finish for maximum corrosion resistance.
• Lightweight Design:
  Reduces overall weight without compromising strength, ideal for weight-sensitive aerospace applications.
• Certified Quality:
  Manufactured to MS21042 standards, ensuring compliance with aviation and military specifications.

Technical Specifications

• Part Number: MS21042L4
• Thread Size: 1/4-28 UNF
• Material: High-strength alloy steel
• Finish: Cadmium plated per QQ-P-416, Type II, Class 3
• Temperature Range: -65°F to 450°F (-54°C to 232°C)
• Self-Locking Type: Non-reusable after installation
• Standards Compliance: MS21042, MIL-N-25027

Applications

The MS21042L4 Self-Locking Washer Nut is ideal for:

• Airframe Structures: Ensures secure fastening in fuselage, wing assemblies, and landing gear.
• Engine Components: Provides reliable fastening under high temperatures and extreme vibration.
• Avionics and Electronic Systems: Safeguards sensitive components from loosening and damage.
• Landing Gear and Control Systems: Ensures stability and performance in critical systems subjected to stress and movement.

How the MS21042L4 Enhances Aircraft Safety

The self-locking feature of this washer nut eliminates the risk of fastener loosening, even under extreme vibration or mechanical stress. The extended washer protects components by distributing loads evenly, reducing the potential for surface deformation and extending the lifespan of surrounding parts.

Why Choose the MS21042L4 Self-Locking Washer Nut?

• Unmatched Reliability: Provides secure, vibration-resistant fastening in the most demanding applications.
• Extended Service Life: High-quality materials and a corrosion-resistant finish ensure long-lasting performance.
• Certified for Aerospace Use: Complies with military and aviation standards for safety and quality assurance.

Order Your MS21042L4 Washer Nut Today

Secure your aircraft’s critical assemblies with the MS21042L4 Extended Self-Locking Washer Nut. Visit Airparts.aero now to place your order and benefit from competitive pricing, fast shipping, and expert customer support.

Note: Verify compatibility with your aircraft’s maintenance manual and consult with a certified aviation technician for proper installation.

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• Meta Title: MS21042L4 Extended Self-Locking Washer Nut – Military Standard Fastener | Airparts.aero
• Meta Description: Buy the MS21042L4 Extended Self-Locking Washer Nut for aerospace applications. High-strength, vibration-resistant, and Military Standard compliant. Available now at Airparts.aero.

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Description: Extended Self-Locking Washer Nut
Part Number: MS21042L4
Alternate Part Numbers: 10121716, 333-1422-100, 5310008071475, 5310PL0141536, 5310PL1389146, 875442-00, 959.30.02.023, 984018, FN12M-048, MBEU64041 ITEM 31, P26042, PN-A-25-27-00-050-941A-A ITEM002, RM52LH3324-048, T98S428, Z00.N5415371302

Product Overview

A nut having 6 flat sides and an integral washer that extends beyond the flats or periphery. An integral feature is incorporated for locking on the threads of a mating member.

Item Specification

 DESCRIPTION

Military Standard Locking Extended Washer Nut Self

• Self-locking, hexagon style
• Dry film lubricant
• Material: Steel
• Finish: Cadmium overall and chromate overall

Applicable Textron Aircraft

• 1900 Airliner
• 1900C Airliner
• 1900D Airliner
• Baron Series B55, E55, 58 or G58
• Beechjet 400/400A
• 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.