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Description
4237 716 0400 STIHL Spline Screw IS-M5x25 – Genuine OEM Cutter Bar Fastener Part
The STIHL Spline Screw IS-M5x25 (4237 716 0400) is a genuine OEM fastening component designed for secure assembly and proper torque retention in STIHL hedge trimmer cutter bars, gear heads, and adjustable angle drive systems. This precision spline screw is used in critical mounting locations where reliable fastening strength and correct alignment are essential for safe operation.
Over time, fasteners may become stripped, corroded, stretched, or damaged due to vibration, repeated servicing, or improper torque application. A worn spline screw can lead to loose cutter bar components, misalignment, or unsafe blade operation. Replacing it with the correct OEM part restores proper assembly integrity without compromising factory specifications.
Manufactured to STIHL factory specifications, this genuine spline screw ensures correct thread fit, strength, and long-term durability under professional operating conditions.
Product Details
OEM Part Number: 4237 716 0400
Brand: STIHL (Genuine OEM)
Part Type: Spline Screw
Specification: IS-M5x25
Application: Cutter bar, gear head, and angle drive fastening system
Condition: New Genuine OEM Part
Function
This STIHL spline screw is designed to:
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Secure cutter bar and gearbox components in place
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Maintain correct torque and assembly alignment
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Prevent loosening from vibration during operation
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Replace stripped, corroded, or damaged fasteners
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Support safe and reliable hedge trimmer performance
⚠️ A damaged or missing fastener can cause component loosening, blade misalignment, or unsafe operation.
Verify Fitment (Recommended)
Before ordering, confirm:
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OEM part number 4237 716 0400
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Screw specification IS-M5x25 matches your application
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Your unit model matches those listed below
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Application matches your STIHL illustrated parts diagram
⚠️ Fasteners are application-specific — always verify by OEM part number and assembly location.
Compatibility
This OEM spline screw fits many STIHL hedge trimmers, Kombi attachments, and battery hedge trimmers used in cutter bar, gear head, and angle drive assemblies, including:
Battery Hedge Trimmers
HSA 94 T / HSA 94 R (Cutter bar 600 mm / 24")
HSA 130.0 T / HSA 130.0 R (Cutter bar 600 mm / 24")
HSA 140.0 T / HSA 140.0 R (Cutter bar 600 mm / 24")
HSA 150.0 T / HSA 150.0 R (Cutter bar 750 mm / 30")
Gas Hedge Trimmers
HS 81 R / HS 81 T / HS 81 TC-E (Cutter bar assemblies)
HS 82 R / HS 82 T (Cutter bar and tightening torques)
HS 86 R / HS 86 T (Cutter bar HS 86)
HS 87 R / HS 87 T (Tightening torques)
Kombi / Long-Reach Hedge Trimmers & Angle Drive Units
HL / HL 0° / HL 145° / HL 94 / HL 94 K / HL 94 KC-E / HL 91 K
HL-KM (Gear head 0° 600 mm)
HL-KM 0° (Gear head 0° 500 mm)
HL-KM 145° (Angle drive adjustable thru 145°)
FH-KM 145° (Tightening torques)
FH 145° (Angle drive adjustable thru 145°)
HLA 135 / HLA 135 K (Angle drive adjustable thru 145°)
HLA 150.0 (Angle drive adjustable thru 145°)
(Exact fitment depends on assembly location and production version — always verify using OEM parts diagram.)
Installation Notes
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Disconnect spark plug or remove battery before service
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Locate spline screw position in cutter bar or gear head assembly
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Remove damaged fastener carefully using correct tool
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Install new spline screw and tighten to STIHL torque specification
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Inspect surrounding components for wear or looseness
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Test blade operation and alignment after installation
⚠️ Always follow STIHL tightening torque specifications to prevent damage or unsafe operation.
Maintenance Tips
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Check fasteners regularly for tightness during service
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Replace stripped or corroded screws promptly
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Avoid over-tightening to prevent thread damage
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Keep cutter bar and gear head assemblies clean and lubricated
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Always use genuine STIHL OEM fasteners for correct strength and fit
