508595 Retaining rings
Fits: 32-57 OHV Big Twin gear case studs;…
incl. VAT
Chapter members save 15% · Sign in for member pricing
Estimated delivery: 3–15 working days
Authorised
Iron City Dealer
14-Day Returns
Easy & hassle-free
Secure Checkout
256-bit encryption
Free UK Delivery
On orders over £100
Specifications
- Brand
- MCS
- Part Number
- 508595
- OEM Reference
- 25810-15
- Pack Quantity
- Pack of 10
- Category
- Retaining Rings
- VAT Rate
- 20%
About This Product
These specialized retaining rings are designed for specific applications on vintage Harley-Davidson engines. They fit the gear case studs on 1932 to 1957 OHV Big Twin models and the idler gear stud on 1937 to 1973 45-inch Sidevalve models. When working on these classic machines, using the correct fasteners is paramount for a proper restoration. These rings serve as a direct replacement for OEM 25810-15 and 508595. They are sold in a pack of 10, ensuring you have the necessary hardware to complete your timing chest assembly or idler gear installation with confidence.
Manufacturer part number: 508595.
Fitment
32-57 OHV Big Twin gear case studs; 37-73 45" SV idler gear stud)
Related Products
View all →
James Gaskets
Retaining ring 35mm fork seal
MCS
Retaining rings, piston wrist pin. spiral lock
MCS
Retaining ring, transmission pawl carrier
MCS
Retaining ring, mainshaft ball bearing
MCS
Retaining ring, transmission mainshaft 2nd & 3rd gear
MCS
Transmission retaining rings, countershaft bearing
MCS
Retaining rings, sprocket shaft bearing. Outer
MCS
Retaining rings, pinion/sprocket shaft bearing
More from MCS
View all →
OEM style main wiring harness, complete set. FLH
OEM style main wiring harness, complete set. WL, UL, EL, FL
OEM style main wiring harness. XL, XLS
OEM style main wiring harness. FXLR
OEM style main wiring harness. FXR
Axle spacer, collar. drum brake & rigids
OEM style early 6-volt coil & cable kit. Black
Jiffy stand kit. std length. Black
Who are we? Leeds Harley-Davidson - Iron City Motorcycles
This product is fulfilled by Iron City Motorcycles, Leeds' authorised Harley-Davidson® dealer, serving the UK with a full range of Genuine Motorclothes®, dealer merchandise, and official Harley-Davidson parts & accessories — available for UK and international delivery.
From OEM Parts to retro lifestyle wear to aftermarket stockits we have what you need to keep you riding all year round.
Use our official OEM parts finder to browse our full Genuine Harley-Davidson® Parts and our associated approved aftermarket catalogues.