Square Head Fitted Bolt — M12 × 45 — product-type studio view

Square Head Fitted Bolt — M12 × 45 — additional product view

Square Head Fitted Bolt — M12 × 45 — source reference photograph

White-background product-type view first. Final dimensions and configuration follow the confirmed drawing.

Critical Rail Fasteners

Square Head Fitted Bolt.

Non-standard · 8.8 or 10.9 · M12 × 45

Square Head Fitted Bolt for subways, light rail, emus and locomotives. Review the product reference, recorded specifications and drawing requirements to identify the configuration needed for your assembly.

Catalogue reference: CF-RT-007

Send Inquiry Full Parameters

Grade / hardness8.8 or 10.9

Size / designationM12 × 45

Surface treatmentSee parameters

Standard / drawingNon-standard

Request a quote

Parameters

Technical parameters.

Product technical parameters
Product	Square Head Fitted Bolt
Standard / drawing	Non-standard
Grade / hardness	8.8 or 10.9
Size / designation	M12 × 45
Surface treatment	Black oxide, grinding and rust-preventive oil
Friction coefficient (µ total)	0.11–0.18
Application	Subways, light rail, EMUs and locomotives
Application record	Recorded since 2016

Confirm the final specification against the order drawing. A recorded application year is not a service-life or warranty statement.

The white-background cover shows the visually matched product type. Exact dimensions, grade and finish are defined by the parameters and confirmed drawing, not by the photograph.

Product details

Product description.

Rail vehicle fastening.

The product record identifies use across subways, light rail, EMUs and locomotives. Use the named component and its individual specification to locate the part within your vehicle assembly; a shared application category does not make different fasteners interchangeable.

SubwaysLight railEMUsLocomotives

Design basis

This is a drawing-defined or non-standard configuration. Start with the product name and catalogue reference, then provide the current drawing revision and the exact version required. The parameter table records the supplied specification; dimensions, material designation and acceptance requirements that are not stated there should be confirmed before quotation.

Drawing and part reference

Head, shank & thread

Identify the head form, thread designation, overall or under-head length and any fitted-shank or shoulder details from the drawing. Where the product name specifies a flange, drilled hole, special drive or cone neck, include that feature in the part reference. A similar photograph is not enough to establish the same specification.

Configuration to confirm

Finish & assembly conditions

The listed treatment is Black oxide, grinding and rust-preventive oil. Specify which listed option is required, together with any drawing-defined preparation or inspection requirements. The recorded friction requirement should remain linked to that specification; it is not an installation-torque value. Tightening instructions and acceptance conditions need confirmation for the actual assembly.

Project-specific requirements

Selection guide.

A clear drawing and complete inquiry help distinguish the exact part from another fastener in the same application group.

Part reference
Send the drawing number and revision, or identify the existing component.
Dimensions
Thread, pitch, length and mating dimensions. Mark any special geometry on the drawing.
Grade / hardness
Identify the required listed option and retain its original grade or hardness notation.
Surface requirements
State the required finish and any project-specific friction or inspection requirements.
Order scope
Specify quantity, additional components and your requested delivery date.

Quote catalogue reference CF-RT-007 when contacting us. Related products below are separate catalogue entries, not a pre-approved assembly kit. Please confirm mating parts and final requirements against the assembly drawing.

Discuss your drawing

Square Head Fitted Bolt.

Technical parameters.