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25 zinc-plated Grade 5 hex nuts 7/16"-20

Prime-Line

Prime-Line 9086656 Hex Nut 7/16"-20 Grade 5 Zinc 25 Pack

SKU CH-Y050-7F2ZH

25 zinc-plated Grade 5 hex nuts with 7/16"-20 fine threads for standard fastening applications

  • TypeNuts
  • Size7/16"-20
  • Grade 5 strength meets ASME B18.2.2 for reliable fastening
  • Fine UNF-2B thread (7/16"-20) ensures precise bolt engagement
  • Zinc-plated steel resists corrosion in automotive and general use
  • 25-piece pack covers multiple repair or assembly jobs
  • Standard hex profile fits common wrenches and sockets

Prime-Line 9086656 Hex Nut Pack

This 25-pack of Grade 5 steel hex nuts fits 7/16"-20 fine-thread bolts, cap screws or threaded rods. The zinc plating resists corrosion in automotive, machinery and general repair jobs. Each nut meets ASME B18.2.2, ASME B1.1 and SAE J995 standards for consistent fit. They install with a standard wrench or socket for quick assembly.

Sustained Load Behaviour

Grade 5 heat-treated steel maintains clamping force under repeated vibration and thermal cycling better than lower-grade fasteners. The UNF-2B thread class provides a tighter tolerance that reduces loosening when joints flex over time. Zinc plating protects the threads from rust that would degrade preload in outdoor or under-hood environments. Standard hex thickness distributes load evenly across the bearing surface.

UNF Fine Thread Limits

Fine 20 threads per inch give higher tensile strength than coarse threads but require longer engagement to reach full capacity. The UNF-2B class allows less allowance than 3B, so damaged or painted threads may bind during installation. Grade 5 proof load is lower than Grade 8, limiting use in critical structural joints that demand maximum shear resistance. Washers are recommended to spread load and protect mating surfaces.

Highlights

  • Grade 5 strength meets ASME B18.2.2 for reliable fastening
  • Fine UNF-2B thread (7/16"-20) ensures precise bolt engagement
  • Zinc-plated steel resists corrosion in automotive and general use
  • 25-piece pack covers multiple repair or assembly jobs
  • Standard hex profile fits common wrenches and sockets

Specifications

BrandPRIME-LINE
TypeNuts
Size7/16"-20

Questions about this item

How much torque can the Grade 5 zinc finish handle before the 7/16"-20 threads strip?

Grade 5 steel meets SAE J995 proof-load requirements for 7/16"-20 UNF-2B threads; always use a calibrated torque wrench and the correct lubrication for the joint design.

What mating hardware do I need so the 25-pack of hex nuts will actually fasten something?

You need bolts, cap screws or threaded rod with matching 7/16"-20 UNF-2B threads plus flat or lock washers to spread the clamping load.

Will these ASME B18.2.2 nuts thread onto the 7/16"-20 studs on my older equipment?

Yes, they conform to ASME B18.2.2 and ASME B1.1 UNF-2B class-of-fit, so they mate with any correctly cut 7/16"-20 coarse or fine studs.

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