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home
about us
company profile
factory tour
quality control
FAQ
products

Excavator Spare Parts

Excavator Coupling

Excavator Seal Kits

Excavator Hydraulic Parts

Rubber Engine Mounts

Excavator Electric Parts

Excavator Engine Parts

Cooling Fan Blade

Komatsu Excavator Parts

Kobelco Excavator Parts

Engine Turbocharger

Excavator Undercarriage Parts

Excavator Bearing

Hydraulic Breaker Parts

Excavator Accessories

Grease Guns

Excavator Final Drive

Excavator Hose
solutions
blog
contact us
quote
good price online

products details

Created with Pixso. Home Created with Pixso. Products Created with Pixso.
Excavator Coupling
Created with Pixso. YNF17708 12mm Spline Bolt M12-40(51.5) Hex Socket Bolt
YNF17708 12mm Spline Bolt M12-40(51.5) Hex Socket Bolt
  • name
  • name
  • name
  • name

YNF17708 12mm Spline Bolt M12-40(51.5) Hex Socket Bolt

Brand Name: YNF
Model Number: M12-40(51.5)
MOQ: 1 SET
Price: ask our sales
Delivery Time: within 5 days
Payment Terms: T/T,PAYPAL,WESTERN UNION
Detail Information
Product Description
Detail Information
Place of Origin:
China
Certification:
CE
Brand:
OEM
MOQ:
1 Piece
OEM/ODM:
Acceptable
Delivery Time:
7-15 Working Days
Shipment:
DHL FEDEX TNT EMS UPS
Packaging Details:
Neutural Packing
Application:
Excavator
Product Name:
Bolt
Packaging Details:
neutral packing
Supply Ability:
5000 sets per week
Highlight:

12mm spline bolt excavator coupling

,

M12-40 hex socket bolt

,

spline bolt with hex socket

Product Description

YNF17708 12mm Spline Bolt M12-40(51.5) Hex Socket Bolt

Product Overview

The YNF17708 12mm Spline Bolt is a precision-engineered fastener designed for construction machinery, excavators, and industrial equipment. With a 12mm spline head, M12 thread, and internal hex drive, this bolt provides secure fastening, high torque transmission, and long-lasting durability under heavy-duty working conditions.

Key Features

  • 12mm spline head with internal hex (Allen / Hex Socket) for stable tightening

  • Thread specification: M12 × standard pitch

  • Available lengths: 40mm / 51.5mm

  • Manufactured from high-strength alloy steel

  • Resistant to shear, vibration, and mechanical stress

  • Precision-machined for accurate fit and leak-free fastening

  • Suitable for hydraulic components, machinery joints, and structural assemblies

  • Direct OEM-equivalent replacement bolt

Technical Specifications
Parameters Details
OEM/ODM Acceptable
MOQ 1 Piece
Brand OEM
Product Name Bolt
Packaging Details Neutural Packing
Shipment DHL FEDEX TNT EMS UPS
Availablity In stock
Color Customized
Application Excavator
Packaging Plastic bag
Applications

  • Excavators and construction machinery

  • Hydraulic cylinder mounting points and structural assemblies

  • Industrial machinery requiring high-torque fasteners

  • Maintenance, repair, and machinery assembly operations

Support and Services

  • Thread and size verification before shipment

  • OEM matching based on old sample or part number

  • Long-term supply for repair shops and distributors

  • Technical guidance for installation

Packing and Shipping

  • Individually packed in anti-rust, moisture-proof bags

  • Export-standard cartons for safe transport

  • Optional neutral or YNF-branded packaging

  • Supports mixed shipments with other parts

Frequently Asked Questions

Q1: Can this bolt replace the OEM part directly?
A: Yes, it is produced to OEM-equivalent standards.

Q2: Is the bolt heat-treated?
A: Yes, all spline bolts are heat-treated for strength and durability.

Q3: Can I order mixed lengths in one shipment?
A: Yes, mixed lengths (40mm & 51.5mm) are supported.



YNF17708 12mm Spline Bolt M12-40(51.5) Hex Socket Bolt 0YNF17708 12mm Spline Bolt M12-40(51.5) Hex Socket Bolt 1

Tags: 

flexible couplings  

rubber couplings  

shaft coupling

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YNF03804 14mm Spline Bolt M14-40(54) Hex Socket Bolt

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Products Details

Created with Pixso. Home Created with Pixso. Products Created with Pixso.
Excavator Coupling
Created with Pixso. YNF17708 12mm Spline Bolt M12-40(51.5) Hex Socket Bolt
All Category

Excavator Spare Parts

Excavator Coupling

Excavator Seal Kits

Excavator Hydraulic Parts

Rubber Engine Mounts

Excavator Electric Parts

Excavator Engine Parts

Cooling Fan Blade

Komatsu Excavator Parts

Kobelco Excavator Parts

Engine Turbocharger

Excavator Undercarriage Parts

Excavator Bearing

Hydraulic Breaker Parts

Excavator Accessories

Grease Guns

Excavator Final Drive

Excavator Hose
YNF17708 12mm Spline Bolt M12-40(51.5) Hex Socket Bolt
  • name
  • name
  • name
  • name

YNF17708 12mm Spline Bolt M12-40(51.5) Hex Socket Bolt

Brand Name: YNF
Model Number: M12-40(51.5)
MOQ: 1 SET
Price: ask our sales
Packaging Details: neutral packing
Payment Terms: T/T,PAYPAL,WESTERN UNION
Detail Information
Product Description
Detail Information
Place of Origin:
China
Brand Name:
YNF
Certification:
CE
Model Number:
M12-40(51.5)
Brand:
OEM
MOQ:
1 Piece
OEM/ODM:
Acceptable
Delivery Time:
7-15 Working Days
Shipment:
DHL FEDEX TNT EMS UPS
Packaging Details:
Neutural Packing
Application:
Excavator
Product Name:
Bolt
Minimum Order Quantity:
1 SET
Price:
ask our sales
Packaging Details:
neutral packing
Delivery Time:
within 5 days
Payment Terms:
T/T,PAYPAL,WESTERN UNION
Supply Ability:
5000 sets per week
Highlight:

12mm spline bolt excavator coupling

,

M12-40 hex socket bolt

,

spline bolt with hex socket

Product Description

YNF17708 12mm Spline Bolt M12-40(51.5) Hex Socket Bolt

Product Overview

The YNF17708 12mm Spline Bolt is a precision-engineered fastener designed for construction machinery, excavators, and industrial equipment. With a 12mm spline head, M12 thread, and internal hex drive, this bolt provides secure fastening, high torque transmission, and long-lasting durability under heavy-duty working conditions.

Key Features

  • 12mm spline head with internal hex (Allen / Hex Socket) for stable tightening

  • Thread specification: M12 × standard pitch

  • Available lengths: 40mm / 51.5mm

  • Manufactured from high-strength alloy steel

  • Resistant to shear, vibration, and mechanical stress

  • Precision-machined for accurate fit and leak-free fastening

  • Suitable for hydraulic components, machinery joints, and structural assemblies

  • Direct OEM-equivalent replacement bolt

Technical Specifications
Parameters Details
OEM/ODM Acceptable
MOQ 1 Piece
Brand OEM
Product Name Bolt
Packaging Details Neutural Packing
Shipment DHL FEDEX TNT EMS UPS
Availablity In stock
Color Customized
Application Excavator
Packaging Plastic bag
Applications

  • Excavators and construction machinery

  • Hydraulic cylinder mounting points and structural assemblies

  • Industrial machinery requiring high-torque fasteners

  • Maintenance, repair, and machinery assembly operations

Support and Services

  • Thread and size verification before shipment

  • OEM matching based on old sample or part number

  • Long-term supply for repair shops and distributors

  • Technical guidance for installation

Packing and Shipping

  • Individually packed in anti-rust, moisture-proof bags

  • Export-standard cartons for safe transport

  • Optional neutral or YNF-branded packaging

  • Supports mixed shipments with other parts

Frequently Asked Questions

Q1: Can this bolt replace the OEM part directly?
A: Yes, it is produced to OEM-equivalent standards.

Q2: Is the bolt heat-treated?
A: Yes, all spline bolts are heat-treated for strength and durability.

Q3: Can I order mixed lengths in one shipment?
A: Yes, mixed lengths (40mm & 51.5mm) are supported.



YNF17708 12mm Spline Bolt M12-40(51.5) Hex Socket Bolt 0YNF17708 12mm Spline Bolt M12-40(51.5) Hex Socket Bolt 1

Tags: 

flexible couplings

rubber couplings

shaft coupling

Related Products
314x46T Coupling For Excavator Replacement Parts with Plastic/Iron Bottom flexible rubber coupling flexible pump coupli

314x46T Coupling For Excavator Replacement Parts with Plastic/Iron Bottom flexible rubber coupling flexible pump coupli

Get Best Price
YNF03804 14mm Spline Bolt M14-40(54) Hex Socket Bolt

YNF03804 14mm Spline Bolt M14-40(54) Hex Socket Bolt

Get Best Price
YNF02122 12mm Spline Bolt M12-34(46) Internal Hex Screw

YNF02122 12mm Spline Bolt M12-34(46) Internal Hex Screw

Get Best Price
YNF01429 18mm Spline Bolt M18-49(68) Internal Hex Screw

YNF01429 18mm Spline Bolt M18-49(68) Internal Hex Screw

Get Best Price
YNF01428 16mm Spline Bolt M16-50(65) 2.0 Internal Hex

YNF01428 16mm Spline Bolt M16-50(65) 2.0 Internal Hex

Get Best Price