DIN 103 Trapezoidal Thread Hex Nut (Tr)
DIN 103 trapezoidal hex nut, Tr 10 to Tr 40 — the hex-profile travel nut for Tr lead screws, wrench-flatted for anti-rotation in the housing — with the collected 14-size table: thread d1, pitch P, width across flats s and nut height h.
Last updated: 2026-11
Specifications
The trapezoidal hex nut is the standard travel and tension nut for DIN 103 Tr-thread screws: a hex outside lets a spanner or a machined hex pocket take the torque reaction, so the nut rides the screw without spinning in its seat — the classic arrangement on gate and valve stems, clamp spindles, presses and screw jacks where the nut either travels along the rotating screw or is held stationary while the screw turns through it. The collected table covers Tr 10 to Tr 40 — 14 sizes — with four rows per size: thread d1, pitch P, width across flats s (17 mm at Tr 10 up to 65 mm at Tr 40) and nut height h (15 mm up to 60 mm — roughly 1.5 × d1 across the range, the engagement length that distributes load over several trapezoidal turns). Thread-fit class, multi-start variants, materials and finishes are not printed by the collected specification and stay per RFQ. For the unflatted cylindrical form see the DIN 103 trapezoidal round nut page; for the mating rod see the DIN 103 trapezoidal thread rod page in the bolts family.
| Standard | DIN 103 — trapezoidal (Tr) thread hex nut, 30° flank profile mating the Tr screw |
|---|---|
| Series | Tr 10 – Tr 40 (14 sizes tabulated) |
| Tabulated geometry | Per size: thread d1, pitch P, width across flats s (17–65 mm), nut height h (15–60 mm, ≈ 1.5 × d1 across the range) |
| Function | Hex flats take the torque reaction so the nut translates or holds without spinning in its seat |
| Thread fit / materials | Not tabulated by the collected specification — per RFQ |
| Thread d1 | Pitch P | s — width across flats | h — nut height |
|---|---|---|---|
| TR 10 | 3 | 17 | 15 |
| TR 12 | 3 | 19 | 18 |
| TR 14 | 4 | 22 | 21 |
| TR 16 | 4 | 27 | 24 |
| TR 18 | 4 | 27 | 27 |
| TR 20 | 4 | 30 | 30 |
| TR 22 | 5 | 30 | 33 |
| TR 24 | 5 | 36 | 36 |
| TR 26 | 5 | 36 | 39 |
| TR 28 | 5 | 41 | 42 |
| TR 30 | 6 | 46 | 45 |
| TR 32 | 6 | 46 | 48 |
| TR 36 | 6 | 55 | 54 |
| TR 40 | 7 | 65 | 60 |
Materials
- Material and thread-fit class specified per RFQ — confirm against screw size and duty cycle at quotation
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 (DIN 103 Trapezoidal Thread Hex Nut (Tr)) 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
Hex or round trapezoidal nut for a Tr screw?
Decide by how the nut is held. The hex form is kept from turning by a spanner flat — it drops into a hex pocket or takes a wrench, which is why it is the service-friendly choice on stems, jacks and adjusting spindles that get dismantled. The round form is pressed or pinned into a plain bore, cleaner in a machined housing but less convenient to replace. Both carry the same Tr thread and similar tabulated heights, so the choice is mounting, not load. Check the collected table's s column against the pocket or wrench you intend to use — s runs from 17 mm at Tr 10 to 65 mm at Tr 40 — and read the h column as your engagement: about one and a half diameters, enough turns to spread the flank load, but still worth de-rating for high duty cycles and abrasive environments. State thread-fit class and lubrication at RFQ.
What is the MOQ and lead time for this nut type?
The minimum order quantity is 10,000 pieces. Stock items ship in 3–7 days; non-stock items are confirmed at quotation. Common sizes in this nut type are widely stocked; confirm the exact schedule against quantity and size mix at quotation.
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