RAM® Key Lock Knob with Brass Insert for C Size Socket Arms

Name: RAM® Key Lock Knob with Brass Insert for C Size Socket Arms
Brand: RAM Mounts
SKU: RAM-KNOB5LU
Price: 22.87 USD
Availability: InStock
Rating: 4.8 (5 reviews)

RAM® Key Lock Knob with Brass Insert for C Size Socket Arms - Main image

RAM® Key Lock Knob with Brass Insert for C Size Socket Arms - View 2

$22.87 ~~$37.49~~ In stock

Category: Components

The RAM locking knob, includes a brass 5/16"-18 thread, for 1.5" socket arms; this allowing you to disengage the screwing of the knob. Once you have set your mount in the location you need, you can lock it in place and feel safe that your mounted device will stay right where you left it.

Before you pay

Check the method and total at checkout.

When it ships

Allow for processing time as well as the journey to you.

Standard Shipping: Handling (business days) 0–1; Transit (business days) 7–15.

Express Shipping: Handling (business days) 0–1; Transit (business days) 7–15.

View policy

If you need a refund

Keep your order number and contact the store to start.

Please contact us for the refund processing timeframe before returning an item.

View policy

Delivery costs

Review the cost for your destination and chosen service.

Standard Shipping · United States: $0.00

Express Shipping · United States: $3.99

View policy

Returning an item

Check the return conditions before sending anything back.

United States · Return window (days after delivery): 30. Return method: By mail. Return postage: Seller pays.

View policy

Customer Reviews (4.8 / 5 · 5 reviews)

Miles Z. ★★★★★ Oct 22, 2026

The brass insert threads smoothly into the arm without any wobble, and the key lock is a nice touch for keeping the mount secure during rough rides.

Thomas H. ★★★★★ Oct 21, 2026

Finally got my mount dialed in exactly where I want it. The key lock knob makes it effortless to loosen and re-tighten that C size arm without any tools, and the 5/16"-18 brass thread feels solid and precise.

Olivia ★★★★★ Oct 20, 2026

The brass insert threads perfectly onto my 1.5" socket arm, and the lock knob stays snug even after a bumpy ride. It's nice to finally have a mount that stays put exactly where I set it.