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Tillotson 196-212-225 Stock M8-1.25 x 60 Head Bolt
Standard Cylinder Head Bolt for 196, 212, 225 Clone Engines - Profile
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Tillotson 196-212-225 Stock M8-1.25 x 60 Head Bolt

Part Number: 138190021
Online Price: $1.25
M8 x 60mm Head Bolts – GX200, Clone & Predator Engines
Availability: In Stock.

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Description

Stock Head Bolts – M8 x 60mm for Honda GX200, Clone, Predator & Tillotson Engines


These M8 x 60mm head bolts are direct OEM-style replacements for many Honda GX200 and clone engines. Manufactured to a structural-grade 8.8 tensile strength (150,000 PSI), these bolts offer reliable performance for box stock and mildly modified small-block engines.


They’re the ideal solution for engine builders looking to maintain OEM specs or improve clamping force in performance applications without stepping up to a full stud kit.


Key Features:

  • Bolt Size: M8 x 1.25 x 60mm
  • Tensile Strength: Grade 8 Equivalent (150,000 PSI)
  • Material Grade: 8.8 structural steel
  • Torque Spec: 26 ft-lbs


Recommended Use:

Ideal for box stock engines and mild performance builds running gasoline. For heavily modified or high-compression setups, especially in stock-appearing classes, we recommend upgrading to a stud kit or using hardened Grade 8 fasteners to ensure head seal integrity.


Compatibility:

  • Honda GX200 / 196cc Clone Engines
  • Tillotson Engines: 196cc – 268cc
  • Wildcat: 223 / 240
  • Ducar Engines: 196 / 212 / 224
  • Harbor Freight Predator 212 (Hemi & Non-Hemi)
  • Predator 224 Non-Hemi
  • Ghost 212

Note: Tillotson R-Series blocks have a shorter cylinder head bolt thread depth compared to other clones. These engines may require shorter bolts or use of an EC Stud Kit for proper fit and reliable head sealing.

FAQ

Q1: What engines are these head bolts compatible with?
A1: These M8 x 60mm head bolts fit a wide range of small block engines, including:

  • Honda GX200 / 196cc clones
  • Predator 212 & 224 Non-Hemi
  • Tillotson 196cc–268cc
  • Wildcat 223/240
  • Ducar 196/212/224
  • Ghost 212


Q2: What material and grade are these bolts?
A2: These bolts are made from Grade 8.8 structural steel (equivalent to SAE Grade 8), offering high tensile strength (150,000?psi) suitable for maintaining head clamp under pressure.


Q3: Can I use these for racing or high-performance builds?
A3: These are ideal for box stock and mild performance builds. For high-compression, turbo, or heavily modified engines, we recommend upgrading to a stud kit or hardened Grade 8 fasteners for maximum reliability.


Q4: What torque spec should I use when installing these bolt?
A4: Torque these bolts to 26?ft-lbs for proper head gasket compression. Overtightening can cause thread damage, so a torque wrench is recommended.


Q5: Will these fit Tillotson R-Series blocks?
A5: Tillotson R-Series blocks have shorter bolt thread depth. These standard 60mm bolts may bottom out—use shorter bolts or consider our EC Stud Kit for proper head sealing in those engines.

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