Have Questions?
Professional-grade parts used trackside.
Expert help during business hours.
Encrypted checkout & trusted payments.
Orders ship quickly from regional warehouses.
Description:
The M8-1.25 Steel Ribbed Rivet Nut (Part #055-304) is designed to provide strong internal threads in thin materials where access is limited to one side of the panel. Made from durable steel and finished with a corrosion-resistant yellow zinc coating, it delivers reliable performance for automotive, fabrication, equipment repair, and industrial fastening applications.
Its ribbed body design helps prevent spinning after installation, ensuring a secure hold in sheet metal and other thin materials. The open-end configuration offers flexible fastening options, while the wide grip range accommodates varying material thicknesses. With M8-1.25 coarse metric threads, this rivet nut creates a dependable threaded anchor for bolts and machine screws in blind mounting situations.
Features:
Heavy-duty steel construction for strength and durability
Yellow zinc finish for corrosion resistance
Ribbed body helps prevent spinning during installation
Open-end design suitable for blind installation
Wide grip range supports different panel thicknesses
M8-1.25 coarse metric thread for secure fastening
Product Specifications:
Part number: 055-304
Size: M8-1.25
Thread type: Coarse
Type: Ribbed threaded rivet nut
Material: Steel
Finish: Yellow Zinc
System of measurement: Metric
Head style: Open End
Body diameter: 13.46 mm
Head diameter: 17.40 mm
Head height: 0.89 mm
Hole size: 13.50 mm (+0.006 / −0.000)
Length: 17.53 mm
Grip range: 0.70 – 3.80 mm
Order Processing
All orders are processed and shipped within 24 hours of purchase (excluding weekends and holidays).
Orders placed after 3:00 PM EST may ship the following business day.
Shipping Methods
Customers select their preferred shipping method and speed at checkout.
Shipping times are determined by the carrier and cannot be guaranteed by us.
Tracking information will be provided once your order has shipped.
Shipping Coverage
If your package arrives damaged, please notify the delivery driver immediately and contact the shipping carrier to file a claim.
You must report any missing or damaged items within 14 days of delivery.
After this time, we cannot be held responsible for lost or damaged items.
Return Window
You have 30 days from the date of delivery to request a return.
After 30 days, we are unable to accept returns, exchanges, or refund requests.
Eligibility
Items must be returned in their original condition—unused, unwashed, and with all tags and packaging intact.
Certain products may not be eligible for return (e.g., special-order items, customized products, or perishable goods).
Items that have been altered, installed, or modified cannot be returned.
Return Process
Contact our Customer Support team to request a Return Authorization (RMA) before sending items back.
Once your return is approved, you’ll receive instructions on where to send the product.
Customers are responsible for return shipping costs unless the item was defective or incorrect.
Refunds
Refunds are issued to the original payment method once the returned item has been received and inspected.
Please allow 5–10 business days for the refund to appear on your account.
In some cases, a restocking fee may apply (if applicable, this will be disclosed during your return authorization).
