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Slotted Castle Nuts Manufacturers

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Introduction

Slotted Castle Nuts (often simply "Castle Nuts") are specialized locking devices featuring slots cut into one end, giving them a castle-like appearance. They are used in conjunction with a drilled bolt (or stud) and a cotter pin or safety wire. Once the nut is tightened to the desired tension, the cotter pin is inserted through the slots and the bolt hole, locking the nut securely in place. This mechanism is crucial for joints where positive locking is mandatory and is commonly seen in automotive, railway, and heavy equipment assemblies.

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Specification

Locking Method

Positive Lock (Requires Cotter Pin)
Standard

ASME B18.2.2, DIN 935
Material Options

Low Carbon Steel, Alloy Steel, Stainless Steel
Key Use

Preventing Loosening, Safety Critical
Required Item

Matching Drilled Bolt + Cotter Pin

Applications

  • Automotive Steering/Suspension: Securing wheel bearings, tie rods, and critical steering components.

  • Railway Rolling Stock: Locking fasteners on axles and bogies that experience extreme vibration.

  • Heavy Equipment: Used on pivot points, hydraulic cylinders, and articulated joints.

  • Aerospace (Safety Wiring): Used with safety wire to prevent movement on critical engine or airframe fasteners.

Advantages

  • Positive Locking: The cotter pin provides an absolute, infallible mechanical lock against rotation.

  • Reusable: The nut itself is fully reusable, only the cotter pin needs replacement.

  • Visual Security: The presence and condition of the cotter pin provide instant visual confirmation of joint security.

  • Adjustable Tension: Allows the nut to be torqued to a specific tension and then rotated slightly to align the pin slot.

Payment & Shipping

We offer complete sets (nut and cotter pin) for convenience. Payment via TT is accepted. Nuts are precision packed to prevent thread damage. Large volume orders are palletized for easy handling in manufacturing plants.

FAQ

  • Q: What is the main safety advantage over a Nyloc nut?
  • A: While Nyloc nuts use friction (prevailing torque) to resist loosening, the castle nut uses a cotter pin to provide a positive mechanical stop. If the Nyloc nut loses tension (due to heat or excessive vibration), it can still back off; the castle nut cannot rotate past the cotter pin, offering a more robust safety assurance.
  • Q: Does the cotter pin weaken the bolt?
  • A: The bolt is drilled at a specific location, which slightly reduces the bolt's cross-sectional area. However, the design accounts for this. Using a castle nut and cotter pin ensures the entire assembly (bolt and nut) is utilized effectively in safety-critical, vibration-prone environments.

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Steady-Ind

Steady-Ind - Pursue quality and cast high-quality goods.

STEADY manufactures over a thousands different types of blind rivet nut in steel,aluminium and stainless steel,thread size from M3-M16 in metric and UNC #6-32 to UNC 1/2-13 in inch. High advantage in stainless steel blind rivets both for open and sealed type, mutigrip,monobolt and other structural rivets. As China Slotted Castle Nuts Manufacturers and Slotted Castle Nuts Factory, we focus on "one stop shopping" and with advantage of large production capacity , consistent quality, competitive prices, punctual delivery and goods serverices before and after sales, STEADY has become one of the leading blind fasteners manufacuture & supplier in Asia.

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Recommended LINS: Slotted Machine Screws Hexagon Thin Nuts DIN 439 ASTM A194 Grade 8 Heavy Hex Nuts Dacromet Automotive Wheel Nuts