I need the size of this item, width and hieght?

its 7inch by 7 inch not sure on hieght maybe 1 inch

What is the bolt hole spacing.

It measures 6 3/8" square, long gated holes are 5/16" wide X 3/4" long, cut on a 45 degree angle. There fore it will take a 1/4" bolt, from 5" to 51/2" C to C.

What is the noise level if any when turning.

I bought 4 of these seats to replace the seats in my lund alaskan. I like and would buy again. They make no noise when turning.

ICan you recomend a sturdy swivel to acommadate a 40" wide seat

my fishing buddy weighs 240 pounds, we have used the swivel with no problem, it is a 6 1/4 inch mounting requirement which may be different than your wide seat. Better check the seat mounting instructions closely.

Attwood 17720 Seat Swivel | Desertcart Australia

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Description

⚓️ Spin into comfort and command your view with Attwood’s ultimate seat swivel!

WEIGHT ACTIVATED SWIVEL - Designed to swivel only when pressure is applied, providing stability when stationary and fluid motion when seated.
EFFORTLESS 360 ROTATION - Experience seamless swivel action with precision ball bearings that activate under your weight for smooth, controlled movement.
TRUSTED LEGACY ENGINEERING - From Attwood, a century-strong leader in marine innovation, guaranteeing quality and reliability you can count on.
DURABLE MARINE GRADE FINISH - Black powder-coated alloy steel ensures long-lasting corrosion resistance, built to withstand harsh marine environments.
UNIVERSAL MOUNT COMPATIBILITY - Fits any standard 5-1/4" mounting hole pattern, making installation quick and hassle-free across a variety of boat seats and DIY projects.

The Attwood 17720 Seat Swivel is a robust, 360° ball-bearing swivel mount designed for universal 5-1/4" boat seat compatibility. Crafted from corrosion-resistant black powder-coated alloy steel, it delivers smooth rotation activated by weight or pressure, ensuring both stability and ease of movement. Backed by Attwood’s 100+ years of marine engineering excellence, this swivel is a top-rated accessory trusted by boaters and DIY enthusiasts alike.

Specifications

ASIN	B001O0D6SI
Auto Part Orientation	Drivers Side
Automotive Fit Type	Universal Fit
Best Sellers Rank	#12,886 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) #2 in Boat Cabin Seating Accessories
Brand Name	attwood
Color	Black
Compatible with Vehicle Type	Boat
Customer Reviews	4.6 4.6 out of 5 stars (5,842)
Fit Type	Universal Fit
Global Trade Identification Number	00014599177203
Included Components	End Product & Information
Item Type Name	boat-seating-accessories
Item Weight	0.01 Ounces
Manufacturer	Attwood
Manufacturer Part Number	17720
Material Type	Alloy Steel
Model Number	17720
OEM Equivalent Part Number	00014599177203
Seat Depth	6.25 inches
UPC	014599177203
Unit Count	1.0 Count

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