0175 3/8" 9" x 5" Oblong Aluminum Backing Plate - ISO View
0175 3/8" 9" x 5" Oblong Aluminum Backing Plate - Spec Sheet Drawing
0175 3/8" 9" x 5" Oblong Aluminum Backing Plate - Top View
0175 3/8" 9" x 5" Oblong Aluminum Backing Plate - Side Profile

3/8" Thick 10" x 5.5" Oblong Aluminum Backing Plate | 3 Countersunk 21/64" Holes | Marine Grade 6061-T6

Part Number: 0175

Precio habitual$ 22.00
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Three-Hole Oblong Backing Plate

Precision CNC-machined 6061-T6 aluminum oblong backing plate with three 21/64" countersunk holes sized for 5/16" fasteners.

Material Marine Grade 6061-T6 Aluminum
Dimensions 10" × 5.5" (L × W)
Thickness 3/8" (0.375")
Mounting Holes 3 countersunk (21/64" dia. for 5/16" fasteners)
Shape Oblong
Finish Matte — tumbled, deburred, paint/powder coat ready
Weight 1.745 lb

Common Applications

Under-deck reinforcement for through-bolted marine hardware, seating, and structural mounting where a three-hole backing plate is needed.

Frequently Asked Questions

What fasteners fit the countersunk holes?
The three countersunk holes are 21/64" diameter and sized for 5/16" fasteners.

What is a backing plate used for?
A backing plate distributes load beneath a mounting surface and reinforces the surrounding structure.

What are the finished dimensions?
This oblong backing plate is 10" × 5.5" and 3/8" thick.

  • 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.

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