Royal Enfield Guerrilla 450 / Hunter 350 Mudguard & Meteor 350 Seat Mount Bolt – H6903017/A (Verify Size)

Royal Enfield H6903017/A Genuine OEM M8 × 25 Mounting Bolt

Replace a missing, corroded or damaged original fastener with the exact-reference Royal Enfield H6903017/A bolt. Specialist Royal Enfield parts catalogues identify this component as BOLT, BUT, M8 X 25, 8.8, WHT. It is shown in OEM illustrated diagrams for front mudguard mounting and is also used in certain other motorcycle assemblies. Always match the part number, dimensions, installation position and model-specific parts catalogue before purchase.

Important fitment clarification: This is one individual bolt, not a front mudguard kit or a set of four screws. The number required for an assembly is separate from the quantity supplied when purchasing one piece.

OEM part identification & specifications

Model-specific application evidence — NOT a universal Royal Enfield bolt

Critical precision: the model-specific illustrated spare-parts books below show the H6903017 base reference as M8 × 25, grade 8.8. They do not independently resolve the exact /A suffix against the conflicting Indian price list. Before dispatch, confirm that your physically supplied H6903017/A matches the required fastener specification for the customer's motorcycle.

These are documented component applications, not a claim that all mudguards, seats, model years or Royal Enfield motorcycles use the same bolt. A partsbook quantity of four is the quantity installed in that assembly, not a four-piece sales pack. This listing supplies 1 bolt per unit ordered.

Not blanket-confirmed for: Classic 350 UCE/Reborn, Bullet 350, Himalayan 411/450, Scram, Interceptor 650, Continental GT 650, Shotgun 650, Super Meteor 650, Classic 650 or Bear 650. Some additional assemblies may use the base number, but those bikes must not be promoted as compatible without the relevant exact application and correct suffix verification.

Cross-check sources: Guerrilla 450 front mudguard https://www.hitchcocksmotorcycles.com/partsbook-pages/11836 ; Hunter 350 front mudguard https://www.hitchcocksmotorcycles.com/partsbook-pages/12965 ; Meteor 350 seat assembly https://www.hitchcocksmotorcycles.com/partsbook-pages/11319 .

Important catalogue discrepancy — please read before ordering

Two independent Royal Enfield specialist parts catalogues identify the exact H6903017/A as M8 × 25, class 8.8, and illustrated partsbook pages identify base H6903017 the same way. However, a published Indian Royal Enfield spare-parts price list contains a conflicting entry describing this same SKU as M10 × 62 dome bolt. These are materially different dimensions. The exact matching M8 × 25 records are more consistent across the component diagrams, but the discrepancy is not fully reconciled by an OEM engineering drawing. Inspect the physical bolt and packaging before dispatch; customers must match their original fastener before fitting. Never substitute M10 for M8.

What you receive

• 1 × Royal Enfield bolt, OEM part number H6903017/A.
• Other washers, grommets, sleeves, mudguard braces, brackets and additional bolts are not included unless separately described and shown with the supplied product.
• If your motorcycle's front-mudguard schematic calls for four pieces, buy quantity 4; an EPC installation quantity does not make this a four-pack.

Related front mudguard mounting hardware — sold separately

Related item names are references from specific illustrated parts lists and do not establish that every model requires all these items. Order each component according to the motorcycle's own EPC.

When should you replace the bolt?

• Missing original mounting bolt or a bolt with visibly damaged threads.
• Rounded, damaged or heavily corroded fastener identified during service.
• Damaged fastener after a mudguard, bracket or related component has been removed.
• Replacement of a fastener that does not meet the original manufacturer specification.

Installation notes and safety

• Verify that the OEM part number and fastener dimensions match the motorcycle's model-specific parts diagram.
• Compare the old and replacement fastener for length, diameter, head seating area, thread engagement and finish before installation.
• Inspect mating threads; do not force a bolt into a bracket, nut or threaded insert.
• Use the correct washers, grommets and sleeves for the particular assembly. Missing rubber isolation components can cause damage or vibration.
• Apply the torque specification from your motorcycle's applicable Royal Enfield service manual. No universal torque figure is claimed for all installations of this bolt.
• If used at the front mudguard, confirm adequate tyre/fork clearance and secure all fasteners before riding.
• Never substitute an M10 × 62 fastener for the M8 × 25 reference because a price list contains conflicting wording.
• Have a qualified mechanic complete any critical mounting work if unsure.

Buyer checklist before ordering

• Is the required OEM reference H6903017/A?
• Does the existing bolt measure approximately M8 × 25, with compatible thread/head dimensions?
• Which assembly does your bike use it in: mudguard, seat bracket or other OEM-listed position?
• How many single bolts does the exploded-view bill of materials require?
• Do you need associated grommets, sleeves, washers or brackets separately?
• For a repaired or modified bike, is the mounting arrangement still the original factory specification?

Frequently asked questions

1. What exactly is H6903017/A?

A genuine Royal Enfield OEM-reference mounting bolt. Specialist catalogues identify it as BOLT, BUT, M8 × 25, 8.8, WHT.

2. Is it an M8 or M10 bolt?

Multiple specialist parts catalogues and illustrated applications specify M8 × 25. One published Indian price list incorrectly or inconsistently gives M10 × 62 for this reference, so verify the actual supplied bolt against the original before fitment.

3. Is it used on the front mudguard?

Yes, the H6903017 base reference is shown in several Royal Enfield front-mudguard parts diagrams. Exact model fitment must be checked in your motorcycle's EPC.

4. Will this fit every Royal Enfield motorcycle?

No. Shared nominal size does not establish universal compatibility; verify by exact part number and installation point.

5. Is this one bolt or a pack of four?

One individual bolt. A parts diagram may require four for a front mudguard, in which case order four units.

6. Does it include the washer?

No washer is confirmed in the package; purchase the relevant washer separately if required.

7. Are rubber grommets and sleeves included?

No. RAG00031 and RAG00032 are separate catalogue components for certain front mudguard installations.

8. What does property class 8.8 mean?

It is the mechanical fastener strength classification printed in the OEM catalogue description. It does not specify torque for every installation.

9. What does WHT mean?

It is the catalogue finish code. The exact coating or shade has not been independently confirmed.

10. Can I use a generic M8 × 25 screw instead?

Diameter and length alone are not sufficient; head shape, seating surface, grade, plating and installation requirements also matter. Use a manufacturer-approved equivalent.

11. Can I use this bolt for the seat or headlight?

The H6903017 base number also appears in some OEM seat and instrument/lighting diagrams. Confirm the precise motorcycle and component position before ordering.

12. Does this bolt fit Classic 350 Reborn?

Do not assume it solely from the motorcycle name. Confirm H6903017/A in the relevant Classic 350 generation and variant parts catalogue.

13. Is the quoted ₹8 an up-to-date MRP?

No. ₹8 is recorded in a February 2024 Indian spare-parts price list and should not be treated as the current verified retail MRP.

14. What if the original bolt has another suffix?

Do not assume suffix interchangeability without OEM revision/supersession confirmation.

15. What torque should I use?

Use the correct torque for the specific fastening position in the manufacturer workshop manual; a single torque value cannot be safely applied to every use of this common bolt.

16. Can I order more than one piece?

Yes. Enter the exact number of individual bolts required for your motorcycle repair.

17. How can I avoid ordering the wrong item?

Compare the old bolt and genuine package label and cross-check the exact part number in your model-specific exploded-view catalogue.

18. What if the fastener is needed for a different assembly?

Provide the vehicle VIN, model, year and original fastener photo so the assembly diagram can be checked before dispatch.

Returns, order verification & Under The Hood support

Check the exact SKU, size, quantity and assembly location before placing your order. Inspect the package and record a complete parcel-unboxing video to support any wrong-item, missing-item or transit-damage claim in accordance with Under The Hood's published policy and applicable consumer rights. If the product does not match the original or the expected dimension, do not force-install it; contact Under The Hood before use.

Source / cross-check references

• Royal Enfield illustrated partsbook at Hitchcock's Motorcycles (front mudguard): https://www.hitchcocksmotorcycles.com/partsbook-pages/11836
• Royal Enfield parts-price listing at Bike-Parts Royal Enfield: https://www.bike-parts-royalenfield.com/royalenfield-motorcycle/price/13100
• Alternative specialist price catalogue: https://www.recambios-royalenfield.es/royalenfield-motocicleta/precio/12450
• Historical Indian price list containing contradictory description: https://populargroup.co.in/wp-content/uploads/2024/07/Price-List-Customer-Feb-2024-ROYAL-ENFIELD.pdf