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Graco 115651 Acorn Hex Nut 5/16-18

The Graco 115651 Acorn Hex Nut 5/16‑18 provides a safe, finished threaded fastening — its domed top covers bolt ends to prevent snagging and protect threads.

  • OEM acorn (cap) nut for 5/16‑18 bolts/threads
  • Covers exposed threads — improves safety & appearance
  • Used in Graco sprayer/pump assemblies or any bolted joint needing thread protection

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Compatible Assemblies for Graco 115651 Acorn Hex Nut 5/16-18

The Graco 115651 Acorn Hex Nut 5/16-18 is a factory-specified cap-nut designed to provide a secure threaded connection while covering exposed bolt threads — improving safety, appearance, and preventing damage or snagging.

  • Graco sprayers, pumps or fluid-handling units where 115651 is listed as hex-acorn nut for structural or assembly bolts.
  • Bolted connections where bolt threads protrude and need to be covered (to avoid snagging or corrosion).
  • Any Graco equipment component assembly requiring a safe, finished look with covered threads and proper fastening (e.g. housings, guards, covers, mounts).

Frequently Asked Questions

An “acorn nut” (also called cap or dome nut) has a domed end that covers the exposed threads of a bolt — useful for protecting threads, preventing snagging or injury, and giving a clean, finished appearance.

Yes — 115651 appears in official Graco spare-parts listings as “NUT, HEX, ACORN, 5/16-18”, confirming its OEM authenticity.

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