Low Head Socket Cap Screw M10×1.5×16 (Allen Bolt) for Royal Enfield Genuine Fitment by Part No. – 594851/A

Pack Of 6 Piece
Royal Enfield genuine Low Head Socket Cap Screw (Allen/hex socket bolt) M10 × 1.5 × 16 mm, Part No. 594851/A. This is a spec-defined OEM fastener used across Royal Enfield assemblies where a low-profile socket head is required for clearance (common in drivetrain/wheel/bracket zones depending on model and year). Because fasteners like this are shared across platforms, the safest way to buy is by exact part number + dimensions, not by guessing a bike list.

It’s commonly replaced during servicing when the original bolt is rounded, rusted, thread-damaged, missing, or when you’re reassembling a component and want the correct OEM grade/fit. Also searched as: M10 Allen bolt Royal Enfield, low head cap screw, socket cap screw 594851, M10×16 RE bolt, hex socket bolt M10 1.5.

Before you buy (return-prevention): match 594851/A from your parts list/invoice, and confirm size (M10), pitch (1.5), and length (16 mm). If you’re unsure, share a photo of the bolt head + thread and where it mounts.
(Dealer listings confirm the specification and naming.)

Key Features 

• Genuine Royal Enfield fastener: 594851/A

• Spec: M10 × 1.5 thread pitch × 16 mm length

• Low-head socket cap profile for tighter clearances vs standard cap screws

• Hex/Allen drive helps controlled torque application (correct tool fit reduces rounding)

• Ideal replacement for stripped/rounded/rusted bolts during reassembly

• Sold as set of 6 pcs 

• Best practice: order by part number + spec to avoid wrong pitch/length returns

Compatibility Table 

Variants

• Pack of 6 

FAQs 

Q1 (Fitment): How do I confirm this bolt fits my Royal Enfield?
Confirm part number 594851/A from your parts list/invoice, then match the physical spec: M10 thread, 1.5 pitch, 16 mm length. If you share a clear photo of the bolt and where it mounts, we can help verify spec before dispatch.

Q2 (Fitment): I only have “594851” without “/A” — is it the same?
Most listings show the current format as 594851/A (sometimes written as 594851-A). If your source shows 594851 without suffix, cross-check the seller description/spec and your old bolt dimensions.

Q3 (Comparison): Genuine OEM bolt vs local hardware bolt — what’s the difference?
The OEM bolt guarantees the exact head profile/clearance, thread pitch, and length intended for that assembly. A “same size” local bolt can still cause clearance issues (head height), wrong pitch damage, or improper seating.

Q4 (Installation): Any installation precautions?
Use the correct Allen key/bit fully seated, start threads by hand to avoid cross-threading, and torque to the service-manual spec for that joint. Replace if the hex socket is rounded.

Q5 (Symptoms): What problems does replacing this screw solve?
Rounded Allen head, seized/rusted bolt, damaged threads, missing bolt after service, or looseness caused by incorrect bolt length/pitch previously installed.

Q6 (Returns-prevention): What info should I share to avoid a wrong order?
Share (1) a photo of the bolt beside a scale/ruler, (2) thread pitch info if available, and (3) where it mounts (component photo). Fasteners are return-sensitive—photo/spec confirmation prevents mismatch.