Nut Hex Flange 5/16-1

Genuine Briggs & Stratton OEM · Part number 2860643SM

The Nut Hex Flange 5/16-1 is a genuine Briggs & Stratton hardware part, OEM part number 2860643SM. Dykes Motors sells it for $3.06. It is in stock to order online, or you can pick it up at our store. Not sure it fits your machine? Send the model and serial number to the parts desk before you order. Dykes Motors is an authorized Bobcat, LS Tractor, and Ferris dealer with genuine parts and service on site.

Price and availability checked Oct 18, 2026

$3.06

We accept Visa, Mastercard, American Express, Discover, Apple Pay, Google Pay, Amazon Pay, PayPal, Venmo, and Klarna.

In stock. Ships in 2 to 3 business days, arrives in 1 to 2 more — by Wed, Oct 28. Free shipping on every parts order. Free pickup at 3069 Hwy 49.

Genuine OEM part. Manufacturer warranty honored at our dealership.

Authorized Briggs and Stratton Dealer

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Fits these models

200 more models in the OEM parts diagram, unverified

Plus 140 more models. Text your model and serial number below and we confirm the exact fit.

Details

Genuine Briggs & Stratton hex flange nut (5/16-1) used to secure components during assembly and maintenance on small engines. This is an OEM part and model-specific, so verify your engine or equipment model number against the fitment list before ordering. Briggs & Stratton part number 2860643SM.

Verify your fitment before you order

Text your equipment model and serial number to 601.516.7255 and we confirm the exact part before you pay. Prefer to talk? Call (601) 516-7255.

Questions about part 2860643SM

What machines does part 2860643SM fit?

We do not list a confirmed fitment for part 2860643SM on this page. Send the model and serial number of your machine to the parts desk and we will check it before you order.