We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Box of twelve black phosphate U-nuts with coarse threads

MIDWEST FASTENER CORP

MIDWEST FASTENER CORP 69243 5/16"-18 Black Phosphate Coarse Thread Extruded Regular U Nuts 12PK

SKU CH-HKVV-ES9R4

Pack of 12 black phosphate U-nuts with 5/16"-18 coarse threads for brake repairs

  • Secure brake components with 12-pack convenience
  • 5/16"-18 coarse thread fits standard automotive applications
  • Black phosphate coating resists corrosion in harsh environments
  • Extruded regular U-nut design enables quick panel installation
  • Speed nut style provides reliable retention without welding

Pack of 12 U-nuts for brake work

This pack contains 12 extruded regular U-nuts sized 5/16"-18 with coarse threads and a black phosphate finish. They are designed as speed nuts for quick installation during brake repairs. The phosphate coating adds corrosion resistance for under-vehicle use.

Verify thread and clearance before fitting

Check that the mounting points on the vehicle accept a 5/16"-18 coarse thread before ordering. Confirm there is enough space for the regular U-nut profile to seat fully. These are new items shipped directly from the manufacturer.

Phosphate finish resists rust on brake hardware

The black phosphate coating protects the steel nuts from moisture and road salt encountered at wheel locations. The extruded regular U shape allows fast hand-starting on studs. A pack of 12 covers multiple corners on most jobs.

Highlights

  • Secure brake components with 12-pack convenience
  • 5/16"-18 coarse thread fits standard automotive applications
  • Black phosphate coating resists corrosion in harsh environments
  • Extruded regular U-nut design enables quick panel installation
  • Speed nut style provides reliable retention without welding

Specifications

BrandMIDWEST FASTENER

Questions about this item

What does the 12-pack include and do I need any additional hardware?

The pack contains twelve 5/16"-18 coarse-thread U-nuts with a black phosphate finish. No extra hardware is included; mating bolts or studs must be purchased separately.

How do I decide between the regular U style and other speed-nut types?

Choose the regular U style when you need a standard clip-on nut for flat or slightly curved panels. Other profiles such as J-nuts or flat speed nuts suit different edge geometries.

What holding power can I expect from the 5/16"-18 coarse thread once installed?

The coarse 18-thread pitch engages quickly in sheet metal and resists vibration loosening, providing reliable retention for brake-component brackets and similar automotive fastening tasks.

Also in this aisle

People compared these

Same shelf, same checkout — eight coins and a 30-minute rate lock.