3/8" Thick 6.125" OD Round Aluminum Countersunk Pad | 6-Hole 25/64" | Marine Grade 6061-T6
Part Number: 0030
Six-Hole Round Countersunk Pad
Precision CNC-machined 6061-T6 aluminum round countersunk pad with six 25/64" mounting holes sized for 3/8" fasteners. Countersunk holes allow screw heads to sit flush with the pad surface for a clean, professional finish on fiberglass deck surfaces. Designed to pair specifically with SKU 0067 (matching backing plate) in a sandwich assembly — commonly used on top or through the side of a deck pedestal, as well as through the fiberglass skin of a hardtop or T-top.
| Material | Marine Grade 6061-T6 Aluminum |
| Outside Diameter | 6.125" (6-1/8") |
| Thickness | 3/8" (0.375") |
| Mounting Holes | 6 countersunk (25/64" dia. for 3/8" fasteners) |
| Shape | Round |
| Finish | Matte — tumbled, deburred, paint/powder coat ready |
| Pairs With | SKU 0067 — 6" OD round backing plate |
| Weight | 0.99 lb |
Common Applications
T-tops, tuna towers, hard tops, radar arches, leaning posts, grab bars, bow rails, outrigger mounts, rod holders — used as a countersunk pad in through-bolted sandwich assemblies on top or through the side of deck pedestals, and through fiberglass skins on hardtops.
Frequently Asked Questions
What does "countersunk" mean for this pad?
Countersunk means the mounting holes are chamfered so countersunk head screws sit flush with the pad surface — no protruding screw heads that could snag lines or cause injury.
What size screws do I need?
The six countersunk holes are sized for 3/8" fasteners (25/64" hole diameter). Use 3/8"-16 stainless countersunk head screws for best results.
Can this pad be used on a fiberglass deck?
Yes — this pad is designed for fiberglass deck installations. The countersunk holes accommodate countersunk head screws, and the pad distributes fastener loads over a wider surface area to prevent deck damage.
Does this pad need a backing plate?
Yes — for through-bolted installations, pair this pad with SKU 0067 (matching round backing plate). The screw enters through this countersunk pad and passes through the mounting surface — whether on top of a pedestal, through the side of a pedestal, or through the fiberglass skin of a hardtop or T-top — and nuts thread onto the fastener behind the backing plate to lock the sandwich assembly together. They share the same bolt-circle pattern for perfect alignment.
- Local pickup available
- One Business Day Shipping
- Call us Mon.-Fri. 9:00 a.m. to 4:00 p.m. if in any doubt.
Due to this item's size and weight we can only ship it in an economical way via Less Than Truckload (LTL) consolidated land shipping, and only to the contiguous 48 States.
For shipping inquiries to AK, HI, PR, US-VI, and international shipping, please contact us first at sales@weldingworldinc.com.
All of the destinations above we can only serve as a Free Carrier (or FCA) modality, that requires the customer to contract and pay for their carrier service of choice. We can still ship the item, but only to a warehouse/receiving office within the 48-contiguous States.
In plain terms what this means is that if you want to ship your product to any non-contiguous US territory or internationally, you, the customer, has to provide us with the warehouse address of the carrier that serves your locality with an address within the contiguous 48-US States, as we do not ship overseas on our own.
