AS/NZS 2465 Hexagon Screws (UNC and UNF Threads)
AS/NZS 2465-1999 (R2016) hexagon head screws on UNC and UNF threads, 7/16 through 2-1/4 in: threads per inch, across flats and corners, head height — the Australasian inch-series hex screw ladder.
Last updated: 2026-11
Specifications
AS/NZS 2465 is the Australia/New Zealand hexagon screw standard for the inch thread series, and the collected table runs 14 sizes from 7/16 to 2-1/4 inches. The thread rows are the identity: the UNC ladder at 20, 18, 16, 14, 13, 12, 11, 10, 9, 8, 7, 7, 6, 6 threads per inch — the coarse series stepping down as diameters grow. Head geometry follows the inch hex pattern: across flats s (7/16 nominal at the 7/16 screw through 2-1/4 with max/min behind it), across corners e max/min (0.505/0.488 at 7/16 to 2.598/2.480 at 2-1/4), and head height k in its fractional nominal/max/min ladder (5/32 through 1-5/16). Where an AS-built structure or imported machinery carries UNC/UNF hex screws, this is the governing designation; the UNF equivalents (the second thread count per diameter) ride the same head dimensions.
| Standard / scope | AS/NZS 2465-1999 (R2016) hexagon screws, UNC and UNF threads — 7/16 through 2-1/4 in, 14 sizes as tabulated |
|---|---|
| Threads (UNC ladder) | 20, 18, 16, 14, 13, 12, 11, 10, 9, 8, 7, 7, 6, 6 TPI across the size range; UNF counts on the second row as printed |
| Width across flats s | 7/16 (0.438/0.428) to 2-1/4 in (2.250/2.175) — nominal/max/min as printed |
| Width across corners e | Max/min: 0.505/0.488 (7/16) to 2.598/2.480 in (2-1/4) |
| Head height k | Nominal 5/32 (0.163/0.150) through 1-5/16 (0.974/0.902) max/min |
| Not tabulated | Lengths, grades/strength, finishes — per RFQ |
Materials
- Inch-series hex screws into Australasian or US-sourced equipment are usually AS/NZS 2465 (or its ISO-inch hybrids) in medium tensile steel, zinc or black; the thread series callout (UNC vs UNF) is the ordering-critical part because the heads are identical across series. Quote size, TPI and series together ("1-1/8 x 7 UNC") on the RFQ — a UNF screw into a UNC hole cross-threads destructively
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 (AS/NZS 2465 Hexagon Screws (UNC and UNF Threads)) 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 pieces. Stock items run 3–7 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
Why does the 7/16 size start this table when inch hex screws usually start at 1/4?
The collected AS/NZS 2465 page tabulates the larger structural-adjacent range — 7/16 through 2-1/4 in — where UNC/UNF hex screws are most demanded in plant and structural work; the small-inch sizes live under the machine-screw identities. The head dimensions follow the familiar inch ladder, so once a job crosses into 7/16-and-up hardware, this is the ladder a "1-5/8 x 8 UNC hex screw" callout orders against. If a drawing asks for smaller UNC hex screws, that is the ASME B18.2.1 inch identity.
How do I tell the UNC and UNF columns apart in the table?
The collected grid prints the thread counts as its identifying rows — the UNC ladder (20 down to 6 TPI) and the finer UNF counts behind it — with the head dimensions shared per diameter column. Read a size column vertically: TPI rows, then s, then k, then e. On the order, never write just the diameter; the series and TPI are what your supplier taps, gauges and stocks against, and the two series are not visually distinguishable on the finished screw without a pitch gauge.
Related knowledge
- Thread-Forming vs Thread-Cutting vs Thread-Rolling Self-Tapping Screws: What the Evidence Settles on Base Material
- Screw Family Selection by Base Material: Wood, Machine and Self-Tapping Threads, Engagement and Coating
- Hex Bolts vs Socket Head Cap Screws: What the Evidence Settles on Strength, Clearance and Cost
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