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DIN 603 Mushroom Head Bolts Wholesale

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DIN 603 Mushroom Head Bolts Manufacturers

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Introduction

DIN 603 Mushroom Head Bolts, also known as Cup Head or Carriage Bolts, are distinguished by their smooth, shallow, round head and the square neck immediately beneath it. The smooth, wide head provides an aesthetically pleasing finish and prevents the bolt from being removed from the exterior (tamper resistance). The square neck locks into wood or soft material, allowing the nut to be tightened from the back with a single wrench, making them perfect for furniture, playground equipment, and public fixtures.

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Specification

Head Style

Mushroom (Cup) Head
Locking Method

Square Neck (Anti-Rotation)
Standard

DIN 603 / ISO 8677 Equivalent
Material Options

Carbon Steel (Class 4.6), Stainless Steel (A2, A4)
Key Feature

Security and Aesthetic Finish

Applications

  • Furniture and Joinery: Securing wooden frames and components for both strength and aesthetics.

  • Public Parks and Playgrounds: Used on wooden structures where a smooth head prevents injury or snagging.

  • Paneling and Cladding: Securing thin layers of material to a frame.

  • Marine Construction: Used in docks and piers where smooth surfaces are required (SS or HDG).

Advantages

  • Security/Tamper Resistant: Cannot be driven from the head side once installed.

  • Smooth Finish: The large, rounded head provides an attractive, safe finish.

  • Easy Installation: The square neck eliminates the need to hold the head while tightening the nut.

  • Load Distribution: The wide head distributes the clamping load over a larger area of the wood or soft material.

Payment & Shipping

We support volume orders and offer flexible payment terms like TT 45 Days for established distributors. Bolts are packed in robust, labeled boxes, with care taken to protect the finishes of the stainless steel and galvanized versions.

FAQ

  • Q: What is the main difference between DIN 603 and a standard Hex Bolt?
  • A: DIN 603 has a round, smooth head and a square neck for anti-rotation. A standard hex bolt has a hexagonal head, which allows for tightening from the head side but provides no anti-rotation feature and is not tamper-resistant.
  • Q: Can DIN 603 bolts be used in metal-to-metal connections?
  • A: Yes, provided the receiving metal component has a square hole punched into it. The softness of the metal must be sufficient for the square neck to engage without damage, though they are most commonly used in wood.

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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 DIN 603 Mushroom Head Bolts Manufacturers and DIN 603 Mushroom Head Bolts 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.

About Us Steady-Ind
Recommended LINS: DIN 912 Socket Head Cap Screws M6 Metric Flange Head Bolts Tension Control Shear Bolts ASTM A307 Grade A Hex Bolts