Clamp Bolt M22×75

In modern railroad infrastructure, the Clamp Bolt M22×75 (also known as a terminal bolt or KPO rail clamp bolt) is an essential ground-level track fastener. Its primary function is to lock the steel rail base securely to the tie lining (baseplate) and wood or concrete sleepers. Used alongside terminal clips, this heavy-duty bolt creates a highly elastic, rigid connection that prevents rail shifting caused by dynamic train vibrations.

Technical Specifications: Clamp Bolt M22×75

Manufactured to survive severe outdoor weathering and massive vertical load thresholds, our M22×75 clamp bolts conform to precise metric parameters:

· Product Type: Railway Baseplate Terminal / Clamp Bolt

· Material Matrix: High-Strength Carbon Structural Steel (Grade 35, 45, or equivalent)

· Thread Profile: M22 outer thread body

· Total Shank Length: 75 mm

· Thread Pitch: 2.5 mm metric coarse thread

· Unit Weight: Approx. 0.23 kg per bolt (approx. 0.47 kg for complete assembly)

· System Compatibility: KPO Track Systems, KB50 / KB65 Assemblies, Crane Rails, and Industrial Tracks

Core Engineering & Application Details

1. Terminal Clamp Assembly Kit

The M22×75 clamp bolt operates as part of a specialized 4-part fastening assembly consisting of the T-head/square-head bolt, a matching PK / KPO rail terminal clamp clip, an M25 double-coil spring washer, and a heavy M22 hex nut.

2. High-Torque Anti-Rotation Base

The unique rectangular T-head or square base inserts vertically into tie-lining channels. This shape locks the bolt firmly into the baseplate slots, allowing maintenance crews to apply high torque from the top hex nut without underneath spinning.

3. Vibration & Metallurgical Strength

Passing trains exert continuous high-frequency vibrations. Forged from premium carbon structural steel and treated via a precise ** quenching and tempering cycle**, our clamp bolts achieve exceptional tensile limits to prevent fatigue-induced snapping and vertical rail displacement.

4. Global Regulatory Compliance

Our production lines match strict international track benchmarks, including GOST 16016-79 / 16016-2014 / 16016-2017, alongside equivalent European UIC 864-2 infrastructure rules. Surface anti-rust treatments are available in Hot-Dip Galvanized (HDG), Plain/Oiled, or Zinc-Phosphate.

Custom Rail Bolt Manufacturing: Custom Specifications & Client Drawings

Every transit network features unique engineering demands. As a premier railway fasteners factory, Signum Rail Fasteners China specializes in custom manufacturing to fit your precise layout constraints. We can fully customize rail bolts according to clients' unique requirements and engineering drawings.

Whether your project requires variations in thread length, non-standard shank diameters, specialized high-tensile material matrix configurations, or custom head shapes (T-head, square head, or oval neck), our facility handles complete product tailoring with elite precision.

Frequently Asked Questions (FAQ)

Q: What is the main difference between a rail joint bolt and a rail clamp bolt?
A: A joint bolt (e.g., M24×150) runs horizontally through rail web holes to lock fishplates face-to-face. A clamp bolt (M22×75) is shorter, locking down vertically into the sleeper baseplate to pull the rail edge tight against the tie block.

Q: Which surface coatings are recommended for ground-level track fasteners?
A: Because they sit at ground level where rainwater collects, Hot-Dip Galvanizing (HDG) or Zinc-Phosphate coatings are strongly recommended to stop rust degradation and maintain track alignment.

Why Source from Signum Rail Fasteners China?

Choosing Signum Rail Fasteners China ensures you are partnering directly with a world-class manufacturing facility focused on premium B2B execution:

· 2-Shift Workforce: Our manufacturing facility operates round-the-clock production shifts to handle high-volume industrial or mainline transit demands with minimized lead times.

· Strict Quality Control (QC): A high-efficiency QC inspection team monitors every batch—from raw steel billet processing and custom thread forging to ultrasonic flaw testing—guaranteeing elite structural reliability.

Request a Technical B2B Quote

Looking for a reliable track hardware supplier or need a custom solution built to your engineering diagrams? Contact Signum Rail Fasteners today to get a rapid, competitive quotation on standard and custom-manufactured M22×75 clamp bolts.