STIHL Genuine Metal Washer for Hedge Trimmers and Long-Reach Cutters - 4237 958 0500

The STIHL Genuine Metal Washer (Part 4237 958 0500) is an original OEM component for UK arborists, landscapers, grounds maintenance teams and domestic users repairing or servicing compatible STIHL hedge trimmers and long-reach hedge cutters. Sitting beneath a bolt or nut, this flat washer distributes clamping force evenly across the mating surface, protects component housings from damage and maintains correct assembly alignment under the sustained vibration of regular hedge trimming and cutting tasks. This part is also referenced as 4237-958-0500 and 42379580500 across STIHL service documentation and ordering systems.

Compatible with a wide range of petrol, corded and battery STIHL models — including the HS 45, HS 82, HSA 94, HSE 42 and HSE 52 — this washer is the correct OEM replacement for routine servicing, scheduled strip-downs and repair work at fastener points including handles, guards and drive-related mountings. Straightforward to fit with basic hand tools. Always confirm your machine's model and serial number against the compatibility list below before ordering — contact Gustharts if you need confirmation. Available from Gustharts, an authorised STIHL dealer with UK stock ready to ship.

Key Features

• Genuine STIHL OEM part — assured compatibility, correct tolerances and reliable performance in specified assemblies
• Part number 4237 958 0500 — also referenced as 4237-958-0500 and 42379580500 for identification and ordering
• Durable metal construction — built for long service life under regular outdoor and professional use
• Distributes fastener load — protects housings, guards and component mating surfaces from damage
• Vibration resistance — helps keep assemblies secure under the sustained vibration of hedge trimmer operation
• Precision fit — maintains correct stacking order and alignment at specified fastener points
• Straightforward installation — fittable with basic hand tools during routine servicing or strip-down
• Wide model compatibility — suitable for petrol, corded and battery STIHL hedge trimmers and long-reach cutters

Technical Specification

Fits Models

• STIHL FH-KM 145
• STIHL FH-KM 145°
• STIHL HL 56 K
• STIHL HL 91 K
• STIHL HL 91 KC
• STIHL HL 92 C
• STIHL HL 92 KC
• STIHL HL 94
• STIHL HL 94 C
• STIHL HL 94 K
• STIHL HL 94 KC
• STIHL HL-KM 0
• STIHL HL-KM 0°
• STIHL HL-KM 0-145
• STIHL HLA 65
• STIHL HLA 66
• STIHL HLA 85
• STIHL HLA 85 Hedge
• STIHL HLA 86
• STIHL HLA 135
• STIHL HLA 135 K
• STIHL HS 45
• STIHL HS 46
• STIHL HS 46 C
• STIHL HS 52
• STIHL HS 56
• STIHL HS 56 C
• STIHL HS 81
• STIHL HS 81 R
• STIHL HS 81 RC
• STIHL HS 81 T
• STIHL HS 81 TC
• STIHL HS 82
• STIHL HS 86
• STIHL HS 86 R
• STIHL HS 86 T
• STIHL HS 87
• STIHL HSA 60
• STIHL HSA 66
• STIHL HSA 86
• STIHL HSA 94
• STIHL HSA 100
• STIHL HSA 130 R
• STIHL HSA 130 T
• STIHL HSE 42
• STIHL HSE 52

Also Known As

This component is also referred to as a flat washer, plain washer, fastener washer, load-spreading washer or spacer washer in STIHL service documentation and general maintenance literature. When sourcing this part, always use STIHL part number 4237 958 0500 — or the equivalent formats 4237-958-0500 and 42379580500 — to confirm you are receiving the correct OEM specification part for your machine.

Why Fit a Genuine STIHL Washer Rather Than an Aftermarket Alternative?

STIHL — the world's leading handheld power tool manufacturer — engineers its OEM components to exact tolerances matched to the specific fastener stacks and assembly loads of each model. For fastener hardware such as washers, the precision of material hardness, dimensional tolerance and surface finish directly affects how assemblies perform over time under vibration and clamping load.

Aftermarket alternatives may appear dimensionally similar but can vary in material specification, thickness and finish — differences that compound under the sustained vibration generated during hedge trimming and cutting work. A correctly specified OEM washer maintains the designed clamping stack, reduces the risk of progressive loosening and helps protect component housings from wear at fastener points. Fitting the right OEM part the first time reduces repeat servicing time and keeps your machine running as designed.

Often Replaced Alongside

When servicing fastener assemblies or completing a strip-down, it is worth inspecting and replacing related hardware at the same time:

• STIHL bolts, screws and fastener hardware
• STIHL hedge trimmer blades and cutter bars
• Sharpening and maintenance tools

Explore More

• STIHL Spare Parts
• STIHL Parts Finder
• Hedge Trimmer Accessories
• Sharpening & Maintenance Tools

FAQs

Is this a genuine STIHL washer?

Yes. This is a genuine STIHL OEM component manufactured to original equipment specification for assured fit, correct tolerances and reliable performance.

What is the part number for this STIHL metal washer?

The manufacturer part number is 4237 958 0500. It is also referenced as 4237-958-0500 and 42379580500 across STIHL service documentation and ordering systems.

Which STIHL machines does this washer fit?

This washer fits a wide range of STIHL hedge trimmers and long-reach hedge cutters including the HS 45, HS 52, HS 82, HS 87, HSA 94, HSE 42, HSE 52, HLA 86, HL 94 series and KombiMotor FH-KM and HL-KM attachments, amongst others. See the full Fits Models list above to confirm compatibility with your machine.

What does a washer do in a hedge trimmer assembly?

A washer sits beneath a bolt or nut to distribute clamping force over a wider surface area. This protects housing materials and mating surfaces from damage, maintains correct assembly stacking order and alignment, and helps prevent fasteners from loosening under the vibration generated during hedge trimming operation.

When should I replace a washer on a STIHL hedge trimmer?

Replace the washer if it is visibly worn, deformed, corroded or missing. As good practice, washers should also be renewed during a full strip-down or any repair where fasteners are removed, to ensure correct clamping force and assembly integrity are fully restored.

Do I need to confirm my machine model before ordering?

Yes. Always check your machine's model number and serial number against the Fits Models list before ordering any STIHL spare part. If you are unsure whether this part is correct for your machine, contact Gustharts with your machine details and we will confirm compatibility.

UK Delivery

Fast, reliable delivery from our UK warehouse.

• FREE UK Standard Delivery
  applies to eligible UK orders over £75 ex VAT.
  Estimated delivery: 2–4 working days
  

• UK Standard Delivery from £3.60 + VAT
  Estimated delivery: 2–4 working days

• Next Working Day Delivery – £6.00 + VAT
  
  Order before 3:00pm (Monday–Friday) for next working day delivery
  

All UK orders are dispatched Monday–Friday and sent via a tracked courier service.