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Elevator Bolts are specialized flat head fasteners designed for secure, flush mounting in high-wear environments such as conveyor belts and bucket elevators. Their large, low-profile head and square neck design ensure firm grip and prevent rotation during installation, making them essential in bulk material handling systems. These bolts are commonly manufactured in stainless steel (SS 304/316), carbon steel, and alloy steel, and conform to standards such as DIN 15237 and ISO specifications.
| Parameter | Specification |
|---|---|
| Material | Stainless Steel (SS 304, SS 316), Carbon Steel (Grade 4.6, 8.8), Alloy Steel |
| Grades | A2-70, A4-80, ASTM A307, ASTM A193 |
| Size Range | M6 to M24 / 1/4" to 1" |
| Thread Type | Metric, UNC, UNF |
| Standards | DIN 15237, ISO 8677, ASTM F593 |
| Head Type | Flat Head with Square Neck |
| Surface Finish | Zinc Plated, Hot Dip Galvanized, Plain, PTFE Coated |
| Tensile Strength | 400 – 800 MPa (depending on grade) |
| Elevator Bolts: Dimensions (ANSI/ASME B18.5) | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
|
Nominal Size |
Body Diameter (E) | Head Diameter (A) | Head Height (H) | Square Width (O) | Square Depth (P) | ||||||
| Max | Min | Max. Edge Sharp | Min. Edge Sharp | Min. Edge Flat | Max | Min | Max | Min | Max | Min | |
| 1/4 | .260 | .237 | 1.008 | .969 | .938 | .098 | .078 | .280 | .245 | .219 | .188 |
| 5/16 | .324 | .298 | 1.227 | 1.188 | 1.157 | .114 | .094 | .342 | .307 | .250 | .219 |
| 3/8 | .388 | .360 | 1.352 | 1.312 | 1.272 | .145 | .125 | .405 | .368 | .250 | .219 |
Elevator bolts are primarily used in conveyor and bucket elevator systems where flush, secure fastening is required to handle bulk materials under continuous motion.
Elevator bolts are typically produced through cold forging or hot forging processes, followed by precision machining and thread rolling to achieve accurate dimensions and consistent strength. Surface treatments such as galvanizing or coating are applied based on application requirements.
Quality assurance involves dimensional inspection, tensile strength testing, hardness verification, and coating thickness checks. Each batch undergoes strict inspection protocols to ensure compliance with DIN and ASTM standards.
At KK Fasteners, production follows ISO 9001-certified quality systems, with full lot traceability and documentation provided for every shipment. This ensures consistent performance across global supply chains and critical industrial applications.
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Elevator bolts are flat head fasteners with a square neck, specifically designed for use in conveyor belts and bucket elevators. Their wide, low-profile head ensures flush installation and distributes load evenly, preventing damage to belt materials while maintaining secure fastening under continuous motion
The choice of material depends on the application environment. Carbon steel is suitable for general industrial use, while stainless steel 304 offers moderate corrosion resistance. For highly corrosive or moisture-rich environments, stainless steel 316 is preferred due to its enhanced resistance to chemicals and oxidation.
Elevator bolts are typically manufactured according to DIN 15237 standards. They may also comply with ISO and ASTM specifications such as ASTM A307 or ASTM F593, which define dimensions, threading, and mechanical properties to ensure consistent quality and interchangeability.
Selecting the right elevator bolt depends on factors such as load capacity, operating environment, belt thickness, and exposure to corrosion. Buyers should consider material grade, bolt size, thread type, and coating to ensure long-term performance and minimal maintenance.
A reliable supplier should offer ISO-certified manufacturing, strict quality control, and full material traceability. It’s also important to check compliance with DIN/ASTM standards and export experience. KK Fasteners supplies elevator bolts globally with documented quality assurance and consistent batch performance.
Reliable fastening in conveyor and bulk handling systems depends on precision, durability, and material integrity. Elevator bolts supplied with strict dimensional control and traceability help reduce downtime and maintenance costs.
For project-specific requirements or bulk orders, connect with KK Fasteners to request a quotation or technical consultation tailored to your application.
