What size ring opening for a 7/16 battery bolt?

For 7/16" battery bolt you will need to go with 1/2" ring terminals.

I'm looking for 3/16" ring any equivalent? Thanks

Thank you for your question. 1/4 would be the closest size to 3/16.

are the #10 the smallest connectors?

The question is worded "#10"....implying that the question is about the eye size, not the wire gauge, which would be stated as "10ga". So, #10 is not the smallest- a #10 screw is either 0.190", or 0.1875", depending on who you ask..about 3/16". A #6 screw is nominally 0.138", so the #6 terminals are smaller. Smaller number equals smaller hole. Wire gage does get larger with the smaller number. Red (22-18ga) appears to be the smallest available here, gauge wise.

is 3/8 the size of the hole?

Yes, 3/8 is the size of the ring eyelet. Wire gauge range is 16-14.

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🔥 Seal the deal with Wirefy – where pro connections meet lasting protection!

RAPID HEAT SHRINK SEAL - Advanced tubing shrinks to 1/3 size with adhesive seal, locking out moisture, oil & corrosion.
MARINE GRADE DURABILITY - Tinned terminals resist saltwater & harsh environments—perfect for automotive & marine pros.
LIFETIME QUALITY ASSURANCE - Backed by Wirefy’s best-in-class lifetime warranty—install with confidence every time.
UNIVERSAL FIT COLOR CODED - Fits 16-14 AWG wires with clear gauge imprint for instant, error-free installation.
PRO GRADE COPPER CONDUCTIVITY - Pure copper core ensures max current flow & minimal voltage drop for flawless connections.

Wirefy’s 130 PCS #10 heat shrink ring terminals combine pure copper construction with a high-performance 3:1 heat shrink tubing, delivering corrosion-resistant, secure electrical connections for 16-14 AWG wires. Rated for 600V and 27A, these marine-grade connectors are color-coded for quick identification and backed by a lifetime warranty, making them the go-to choice for professionals demanding reliability in automotive, marine, and industrial wiring.

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Colour	Blue 16-14 Gauge
Connector Type	Crimp
Contact Material	Copper
Insulation Material	Polyolefin
Terminal	Ring Terminal
Material	Copper
Brand	Wirefy
Specification Met	UL
Temperature Rating	From -67 to 257 F
Product Dimensions	8.5L x 8.5W x 8.5H Centimeters
Maximum Voltage	600 Volts
Net Quantity	130.0 count
Manufacturer	Wirefy
UPC	857409007204
Country of Origin	USA
Model number	RSRV2-5S-130
Special Feature	Easy to Install
Item Weight	150 g
Item model number	RSRV2-5S-130
Voltage	600 Volts
AC Adapter Current	27 Amps
Power Source	Ac/Dc
Are batteries included?	No

Wirefy 130 PCS Heat Shrink Ring Terminals #10 - Marine Grade Ring Connectors - Eyelet Wire Connectors - Blue 16-14 AWG

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