MS17825-3 - Textron Aviation OEM Castle Nut

MS17825‑3 – Textron Aviation OEM Castle-Style Self-Locking Nut, 10‑32 UNF

Available now on Airparts.aero Marketplace

Overview

The MS17825‑3 nut is a high-performance, castle-style, self-locking nut often used in precision applications across Beechcraft, Cessna, and other certified aircraft. Constructed from steel with a nylon insert and cadmium plating, it's designed to provide reliable locking under vibration and high-load conditions while allowing cotter-pin retention for fail-safe operation.

Technical Specifications

• Part Number: MS17825‑3
• Type: Hexagon self-locking “castle” nut with nylon insert
• Thread Size: 10‑32 UNJF‑3A (fine pitch threaded)
• Thread Quantity: 32 threads per inch
• Material: Steel body, nylon locking insert
• Finish: Cadmium- or chromate-plated per MIL‑QQ‑P‑416 spec
• Nut Height: 0.235″–0.265″
• Width Across Flats: 0.367″–0.376″
• Temperature Rating: Up to 250 °F typical (insert limit)
• Locking Feature: Prevailing torque from insert + castellated top for cotter pin
• Weight: Approx. 0.003 lb each

Aircraft Compatibility

This nut is the OEM standard in many Textron platforms, including:

• Beechcraft King Air 90/100/200/300
• Cessna Citation I/II/III/V/Ultra/XLS series
• Piper PA‑28 variants
• Machined per length and diameter guidance in Illustrated Parts Catalogs for structural and control system use

Check your aircraft’s IPC or SRM to confirm location and torque specs on part installation.

Applications & Benefits

• Structural Fastening: Secures landing gear, control linkages, and strut brackets
• Redundancy-Enhanced Locking: Nylon insert resists vibration; castle design supports cotter pin for backup
• OEM Fit: Installs without modification, preserving factory torque and thread engagement
• Durability: Cadmium plating protects against corrosion and enhances lifespan
• Certification: FAA traceable documentation; produced under military standard spec – ensures airworthiness compliance

Maintenance & Installation Notes

• Torque Specification: Use aircraft-specific torque (usually 35–40 in‑lb for 10‑32 steel nuts with matching bolt)
• Cotter Pin Usage: Align nut slots after torqueing; install correct diameter cotter pin for fail-safe locking
• Insert Monitoring: Replace if nylon insert shows wear or thermal stress; nylon may degrade at >250 °F
• Inspection Practice: Regularly inspect for corrosion, torque retention, and clearance per maintenance manual

Order Your MS17825‑3 Nut Today

Protect your aircraft systems with this certified castle-style locking nut. Order the MS17825‑3 now from Airparts.aero—always in stock, ready to ship, and backed by professional aviation support.