RAM® Pin-Lock™ Replacement 4-Pin Key for D & E Size Socket Arms

Name: RAM® Pin-Lock™ Replacement 4-Pin Key for D & E Size Socket Arms
Brand: RAM Mounts
SKU: RAP-S-KEYN5-4U
Price: 2.74 USD
Availability: InStock
Rating: 5.0 (5 reviews)

RAM® Pin-Lock™ Replacement 4-Pin Key for D & E Size Socket Arms - Main image

RAM® Pin-Lock™ Replacement 4-Pin Key for D & E Size Socket Arms - View 2

RAM® Pin-Lock™ Replacement 4-Pin Key for D & E Size Socket Arms - View 3

$2.74 ~~$4.49~~ In stock

Category: Components

The RAP-S-KEYN5-4U replacement key knob is compatible with 2.25"/3.38" diameter D/E size arms and mounts that contain the Pin-Lock™ security nut. Verify the correct replacement key knob by matching it's node number pattern with the node number pattern found on the security nut.

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Express Shipping · United States: $3.99

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

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Customer Reviews (5.0 / 5 · 5 reviews)

Edward ★★★★★ Oct 23, 2026

Took me a minute to line up the pin slots, but once I did it clicked right into the socket arm—no wobble at all. The metal feels solid, and the 4-pin design gives a secure lock without any frustrating play.

Robert ★★★★★ Oct 22, 2026

Finally got the replacement key knob and it matched the existing Pin-Lock nut perfectly on my D-size arm. Fits snug without any wobble. Exactly what I needed for a quick repair.

Natalie N. ★★★★★ Oct 21, 2026

I was a little worried about getting the right fit, but the 4-pin design matched perfectly with my existing D-size arm. It locks in securely and feels just as sturdy as the original. Now I can finally stop using that zip tie as a temporary fix.