how big is the circular eyelet hole? at least 0.50" ?? on the "8 awg, 1/2" (M12) option?

In the description - 8AWG, 1/2". The 1/2" means that a 1/2" bolt will go through the hole.

What size fits a standard threaded battery post? 3/8 or 5/16 I'm thinking?

5/16" is the standard battery post but; I always buy 3/8" eye holes on the hi-press lugs to make it easy to use buss bars or other termination points that commonly use 3/8" - 18 thread as a standard. Just use 5/16" flat washers with the 5/16" studs and it will be the right procedure .

Is it bad to use a 2/0 copper lug instead of 1/0 lug for a 1/0 wire?

I do it on occasion. I fill the void with solder. Tin the wire, then with a torch heat the lug and melt solder into it to its about 1/2 full, then carefully slip wire into lug. Some excess solder may ooze out, but you'll have a great connection

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SELTERM 25pcs 2/0 AWG 3/8" Stud Heavy Duty Bare Copper Battery Wire Lugs

Product ID: 45978088

Details

Color
Bare Copper
Connector Type
Crimp Ring
Contact Material
Copper
Insulation Material
Non-Insulated
Terminal
Ring Terminal

🔌600V max voltage rating

🔥High temp durability up to 90°C

🛠️Heavy duty annealed copper

KSh14786

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Sold byAmazon KenyaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

⚡ Connect with Confidence — Power Up Your Projects Like a Pro!

BUILT TO LAST - Heavy duty 100% annealed copper construction resists wear, bending, and high temperatures up to 90°C.
VERSATILE FIT - 3/8" stud size with 2/0 AWG compatibility fits a wide range of battery cables and electrical setups.
ALL IN ONE PACK - 25 premium copper lugs included—perfect for solar, automotive, marine, RV, and home electrical upgrades.
CERTIFIED SAFETY - UL listed and compliant with SAE J163 & J1811 standards for peace of mind in industrial and DIY projects.
MAXIMUM POWER FLOW - 600V+ rating ensures reliable high-current conductivity for your critical battery connections.

The SELTERM 25pcs 2/0 AWG 3/8" Stud Battery Lugs are heavy duty, UL-listed bare copper ring terminals designed for superior conductivity and durability. Rated for 600 volts and temperatures up to 90°C, these annealed copper lugs provide a secure, corrosion-resistant connection ideal for automotive, solar, marine, and industrial electrical applications. Each pack includes 25 reliable connectors engineered to meet SAE standards, ensuring professional-grade performance and safety.

Specifications

ASIN	B073CMBLV8
Best Sellers Rank	#2,087 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #7 in Ring Terminals
Brand Name	SELTERM
Color	Bare Copper Lugs
Connector Type	Crimp, Ring
Contact Material	Copper
Customer Reviews	4.8 4.8 out of 5 stars (11,752)
Gauge	2/0 AWG
Insulation Material Type	Non-Insulated
Item Dimensions L x W x H	6"L x 5"W x 2"H
Item Highlight	High Conductivity Low Voltage Drop Ring Terminals 00 Gauge UL Copper Eyelets Electrical Battery Terminal Connectors Cable End
Manufacturer	SELTERM
Material Type	Copper
Maximum Voltage	600 volts_of_direct_current
Model	MDS2038U
Number of Items	25
Part Number	MDS2038U
Stud Size	3/8
Temperature Rating	0-90 C
Terminal	Ring Terminal
UPC	810038970226
Unit Count	25 Count

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KSh14786

Duties & taxes included

In stock

Sold byAmazon KenyaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Kenya.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Farhan Q.

The delivery time was excellent, and the packaging was secure.

2 months ago

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The product exactly matches the description. Very satisfied with my purchase.

5 days ago

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