Half-Hex Body Rivet Nuts
Half-hex body rivet nuts: hex flats on a compact body for strong anti-rotation without the full hex hole — the collected manufacturer line names them "strong anti-rotation in a more compact profile", with large-flange and small-flange series and an inch-hole variant (CHKI) that pairs metric threads with fractional drilled holes.
Last updated: 2026-11
Specifications
The half-hex body is the middle of the spin-out ladder: hex flats key the insert against torque like a full hex, but the body is more compact and the hole requirement lighter — the collected manufacturer line summarizes it as strong anti-rotation in a more compact profile. The full-metric series runs three forms: CHLM (large flange), CHKM (small flange) and CHKI (small flange, inch-hole variant), where CHKI addresses a specific and common mixed-standards problem — metric threads installed into fractional/inch drilled holes, so panels tooled in inch do not need a metric drill series. Where the full hex body still outperforms it (the manufacturer credits full hex with superior pull-out, push-out and thread performance from the larger cross-section), the half hex wins on panel geometry: less material displaced, closer hole spacing and lighter preparation than full hex, while still carrying substantially more torque than any round or smooth body. It is the pragmatic choice for high-torque threads on panels that cannot justify a hex-punching operation.
| Type | Half-hex body rivet nut — hex flats on a compact body; anti-rotation between knurled round and full hex |
|---|---|
| Positioning | Manufacturer line: "Strong anti-rotation in a more compact profile" |
| Full-metric series availability | CHLM (half hex, large flange) · CHKM (half hex, small flange) · CHKI (half hex, small flange, inch-hole variant) |
| Inch-hole variant | CHKI pairs metric threads with fractional/inch drilled holes — for inch-tooled panels that need metric fasteners without a metric drill series |
| Torque positioning | Below full hex — the collected line credits full hex with superior pull-out, push-out and thread performance from its larger cross-sectional area; above any round/knurled body for torque |
| Panel geometry | More compact than full hex: less displaced material, closer hole spacing, lighter hole preparation |
| MOQ / lead time | 10,000–50,000 pieces by size; 10–20 days |
| Thread | Across flats max (mm) | Head diameter (mm) | Hole in sheet (mm) | Grip range options (mm) | Min sheet (mm) |
|---|---|---|---|---|---|
| M3x0.5 | 4.98 | 8 | 5 | 0.5-2.0 | 0.5 |
| M4x0.7 | 5.98 | 9 | 6 | 0.5-2.5 | 0.5 |
| M5x0.8 | 6.98 | 10 | 7 | 0.5-3.0 / 3.0-5.5 | 0.5 |
| M6x1 | 8.98 | 13 | 9 | 0.5-3.0 / 3.0-5.5 | 0.5 |
| M8x1.25 | 10.98 | 16 | 11 | 0.5-3.0 / 3.0-5.5 | 0.5 |
| M10x1.5 | 12.98 | 19 | 13 | 0.7-3.5 / 3.5-6.0 | 0.7 |
| M12x1.75 | 15.98 | 23 | 16 | 1.0-4.0 | 1.0 |
Materials
- Steel
- Stainless steel
- Aluminum
Ordering & documentation
Documents
Shipments are backed by Mill Test Certificate (MTC), Dimensional Report, Salt Spray Test Report on request, with full batch traceability from raw material to finished product. Quality management follows the owner-confirmed compliance list: ISO 9001:2015, RoHS, REACH. Exact document sets are confirmed on the order.
Quotation
- The fastener family (Half-Hex Body Rivet Nuts) plus the standard designation from your drawing — DIN / ISO / JIS / ASTM / ANSI, or a drawing for custom parts.
- Size (diameter and length), thread type (metric or inch), property class or grade, and coating or finish.
- Quantity per size and your target delivery date.
- Destination country, and any required documents (for example a mill test certificate) so the quote includes them.
Sample & supply
Minimum order quantity is 10,000–50,000 pieces depending on size. Standard production run 10–20 days. Quantities or variants outside the standard range are confirmed at quotation.
Storage & shipping
Parts are packed for export and shipped factory-direct to buyers in Europe, Asia, the Americas and the Middle East. Store fasteners dry and protected until installation, and keep coated parts in their packaging until use; specific packing and preservation requirements can be stated on the order and confirmed at quotation.
Frequently asked questions
Half hex or full hex — where is the line?
Between hole cost and torque headroom. Both bodies key flats against spin; the full hex has the larger cross-section and carries the manufacturer's structural-applications designation, but it demands a true hexagonal hole. The half hex keeps flat-keyed anti-rotation in a more compact body and is the manufacturer's named answer for strong anti-rotation when the profile must stay tight. Specify full hex for structural and high-clamp-load points where the hex tooling already exists; half hex when torque rules out round bodies but panel geometry, hole spacing or tooling budget rules out full hex.
What is the CHKI inch-hole variant for?
For mixed-standards assemblies. Its thread is metric but its hole is fractional/inch: panels designed and punched on an inch tooling system can take the insert with the drills they already run, while the fastener that goes into the insert is metric. The collected full-metric line offers this pairing explicitly (CHKI half hex, COKI smooth round) precisely because imperial-body rivet nuts in metric holes otherwise force oversized or non-standard holes. If your panels are metric-tooled throughout, the CHLM/CHKM metric-hole series is the standard route.
What is the MOQ and lead time for these rivets?
Minimum order quantity is 10,000–50,000 pieces depending on size and material. Standard production lead time is 10–20 days. Common blind rivet sizes are widely stocked — confirm the exact schedule against quantity and size mix at quotation.
What should an RFQ for these rivets state?
State the rivet subtype (open-end, closed-end, structural blind rivet or rivet nut), body diameter, grip range or total material thickness, head style (dome, countersunk or large flange), body and mandrel materials (for example aluminum body with steel mandrel, or all-stainless), finish, required certificates such as a mill test report per EN 10204 3.1, and quantity per size — plus destination country.
Request a Quote
Get factory-direct pricing from the manufacturer.
What to include in your inquiry
- ✓ Standard and property class (e.g. DIN 912, ISO 4762, class 8.8) — or a drawing for custom parts.
- ✓ Sizes, lengths and thread type (metric or inch).
- ✓ Quantity per size and your target delivery date.
- ✓ Destination country, plus any coating or finish requirement.
- ✓ Any documents you need with the shipment (e.g. mill test certificate) so the quote includes them.
- ✓ Your inquiry goes straight to the factory team by email and gets a reply within 24 hours.
- ✓ Factory-direct pricing
- ✓ Standard and custom specifications
- ✓ Factory-direct export to buyers in Europe, Asia, the Americas and the Middle East
- ✓ Full fastener family support