Nuts
Hexagon Cap Nuts
Closed-end design that covers exposed threads.
Drag to rotate · scroll to zoomDrag to rotate · pinch to zoom
Used where thread protection or a finished appearance matters — from equipment guards to decorative assemblies.
Manufactured to
Standards.
SAE J483High and low crown (acorn) hex nuts
ASTM A194Nut material grades
ASME B1.1Unified inch screw threads
The buyer’s guide
What are hex cap nuts?
A cap nut closes the top of the hex with a domed crown, covering the protruding thread end completely. The dome protects people from sharp threads, protects threads from damage and corrosion, and gives equipment a finished look.
- Closed crown — thread end fully covered
- Standard and high-crown patterns
- Stainless, brass, and plated steel
- Mind the thread engagement depth — the dome limits it
Other names
- Acorn nuts
- Dome nuts
- Crown nuts
- Blind nuts
Tips for purchasing
- Check stud protrusion against the dome's internal depth — too long a stud bottoms out before clamping.
- High-crown styles buy extra thread room.
- Certs on request.
Available in
Materials.
A194 2HA194 2HMA194 4A194 7A194 7MA194 8A194 8MA194 8CA194 8TF880F879F837F594 stainless nuts304 Stainless304L Stainless316 Stainless316L StainlessA193 B8T Class 1A193 B8T Class 2A320 B8T321 StainlessA193 B8C Class 1A193 B8C Class 2A320 B8C347 StainlessA193 B6410 Stainless416 Stainless17-4 PHF468 nonferrous boltsF467 nonferrous nutsInconel 718Inconel X-750Nimonic 80AInconel 725Incoloy 925Incoloy 825Incoloy 800H/HTMonel 400Monel K-500Duplex 2205Super Duplex 2507Zeron 100A193 B8RA193 B8SNitronic 50Nitronic 60A453 660
Representative capabilities — every item is manufactured or certified to your specification. Confirm requirements with our estimating team.
Applications
Thread protectionFinished assemblies
Need it to a drawing? Need it tonight?
24/7 hot-shot manufacturing · 832-446-3442