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We offer shipping to most countries. Simply select your country once you have added items to your basket and you'll be shown an instant price for shipping without having to advance in to the check out process.

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200,000+ Parts & Accessories
Our catalogue has grown extensively over the years and we now source a huge range of parts and accessories from a number of distributors from round the world.

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Order Online Or By Phone 
We're more than happy to have customers order which ever way they prefer. If you'd like to discuss anything over the phone prior to ordering we'd be delighted to help you.

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Simple Exchange Or Refund Policy 
We know when customers receive their orders there is always the possibility of needing to exchange or return items for a refund. Rest assured if you need to, we make it simple. See T&C's for more details.

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Price Match Promise 
We offer a price match promise on all items we sell. Use the "Seen it cheaper?" option found on the product pages to request a price match.

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ARH Custom Custom Motorcycle Parts and Accessories ARH Custom Custom Motorcycle Parts and Accessories

Colony Cylinder Base Lockwashers 7/16 in Chrome Finish For 1930-1978 OHV & SV B.T., 1957-1986 XL Models (ARM521989)

  • Colony Cylinder Base Lockwashers 7/16 in Chrome Finish For 1930-1978 OHV & SV B.T., 1957-1986 XL Models (ARM521989)
£7.03 inc.VAT
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Seen it cheaper elsewhere?

Our Price Promise

Seen this item cheaper on another website? Let us try and match it!

We do our upmost to keep our prices competitive but due to the number of items we sell, you may occasionally find a better price advertised elsewhere. If you have seen a cheaper price on another website let us know by filling in this form. If we’re able to match the price, we’ll look to respond via email with a unique discount code within 1 hour (during working hours) so you're not waiting too long.

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Please note:

  1. The item must be identical to the one on our website listing and must show as being available.
  2. Price match applies to items sourced from authorised UK retailers only, not private sellers.
  3. Prices will only be matched from UK based websites with prices in GBP.
  4. ARH Custom reserve the right to price match only one of each item per customer.
  5. ARH Custom reserve the right to withdraw the price match policy at any time.

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EU stock Estimated shipping date between 30 Dec and 3 Jan.

Usually ships in 2-5 business days

All orders are shipped out of our UK premises. Estimated shipping date between 30 Dec and 3 Jan.

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About Shipping Costs

Shipping Cost

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Part numbers +

  • ARM521989
  • 989125

Fitment +

    HARLEY DAVIDSON
  • Hydra Glide - E: 1936-1952
  • Hydra Glide - EL: 1936-1952
  • Hydra Glide - ELF: 1952
  • F 1200: 1946-1948
  • Hydra Glide - F: 1949-1952
  • FL 1200: 1941-1964, 1970-1977
  • Duo Glide - FL 1200: 1958-1964
  • Electra Glide - FL 1200: 1970-1977
  • Hydra Glide - FL 1200: 1949-1957
  • Electra Glide - FLB: 1965-1969
  • Hydra Glide - FLE: 1953-1956
  • Hydra Glide - FLEF: 1953-1956
  • Duo Glide - FLF 1200: 1958-1964
  • Hydra Glide - FLF 1200: 1952-1957
  • Electra Glide - FLFB 1200: 1965-1969
  • Duo Glide - FLH 1200: 1958-1964
  • Electra Glide - FLH 1200: 1970-1978
  • Hydra Glide - FLH 1200: 1955-1957
  • Electra Glide - FLHB: 1965-1969
  • Electra Glide - FLHFB: 1965-1969
  • Duo Glide - FLHF: 1958-1964
  • Hydra - FLHF: 1955-1957
  • Super Glide - FX: 1971-1978
  • Super Glide - FXE: 1974-1978
  • Low Rider - FXS 1200: 1977-1978
  • Servi-Car - G: 1935-1963
  • Servi-Car - GA: 1935-1963
  • Servi-Car - GD: 1935-1941
  • Servi-Car - GDT: 1935-1941
  • Servi-Car - GE: 1964-1972
  • Sportster - XL 883: 1986
  • Sportster - XL 900: 1957-1959
  • Sportster - XLC: 1958
  • Sportster - XLCH: 1957-1979
  • Sportster Cafe Racer - XLCR: 1977-1979
  • Sportster - XLH: 1958-1986
  • Roadster - XLS: 1978-1985
  • Sportster Touring - XLT: 1977-1978
  • Sportster - XLX: 1983-1985

Delivery +

All orders are shipped with either DPD, Fedex, UPS, DHL or Royal Mail. The courier used to ship your order is determined by ourselves once your order has been placed and normally depends on the size, volume and the shipping destination. The selected courier for your order will be quoted in your order confirmation email which you will receive once we have processed your order. Once your order has been shipped, this will be confirmed via email and you will receive a tracking number so you can keep an eye on your shipments progress.

Streethog Cylinder Head/Base Nut 7/16-20; high Torque Style, Provides Extra Clearance For Big Bore Cylinders Fits Stock Bore As Well in Stainless Steel For 1936-1984 B.T. Models (ARM773009)Streethog Cylinder Head/Base Nut 7/16-20; high Torque Style, Provides Extra Clearance For Big Bore Cylinders Fits Stock Bore As Well in Stainless Steel For 1936-1984 B.T. Models (ARM773009)

EU stock

Usually ships in 2-5 business days

All orders are shipped out of our UK premises. Estimated shipping date between 30 Dec and 3 Jan.

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£9.54 inc.VAT
Colony Cylinder Base Nut Kit, High-Torque No Washers, Provides Extra Space For Big Bore Cylinders But Fits Stock Bore Equally Well in Chrome Finish For 1936-1984 B.T. Models (ARM087105)Colony Cylinder Base Nut Kit, High-Torque No Washers, Provides Extra Space For Big Bore Cylinders But Fits Stock Bore Equally Well in Chrome Finish For 1936-1984 B.T. Models (ARM087105)

EU stock

Usually ships in 2-5 business days

All orders are shipped out of our UK premises. Estimated shipping date between 30 Dec and 3 Jan.

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£34.07 inc.VAT
Colony Cylinder Base Nut Kit Acorn in Chrome Finish For 1957-1985 XL, 1929-1973 45 Inch SV Models (ARM811989)Colony Cylinder Base Nut Kit Acorn in Chrome Finish For 1957-1985 XL, 1929-1973 45 Inch SV Models (ARM811989)

EU stock

Usually ships in 2-5 business days

All orders are shipped out of our UK premises. Estimated shipping date between 30 Dec and 3 Jan.

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£21.28 inc.VAT
Colony Cylinder Head Bolt Kit 12 Point Domed Heads in Chrome Finish For Late 1985-1991 B.T., 1986-1991 XL Models (ARM995989)Colony Cylinder Head Bolt Kit 12 Point Domed Heads in Chrome Finish For Late 1985-1991 B.T., 1986-1991 XL Models (ARM995989)

EU stock

Usually ships in 2-5 business days

All orders are shipped out of our UK premises. Estimated shipping date between 30 Dec and 3 Jan.

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£115.70 inc.VAT
Colony Head Bolt Kit OEM Style Including Washers in Zinc Finish For 1973-1985 XL Models (ARM918929)Colony Head Bolt Kit OEM Style Including Washers in Zinc Finish For 1973-1985 XL Models (ARM918929)

EU stock

Usually ships in 2-5 business days

All orders are shipped out of our UK premises. Estimated shipping date between 30 Dec and 3 Jan.

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£42.04 inc.VAT

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Shipping Cost

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