DIN 1481 / ISO 8752 Slotted Spring Pins (Heavy Type)
Straight slotted spring pins (roll pins) per DIN 1481 / ISO 8752, heavy type — hollow pins split along the full length, spring-loaded against the bore. Dimension series 1–13 mm, D1 1.2–13.8 mm, wall S 0.2–2.5 mm, single shear 0.35–57.6 kN, double shear 0.7–115 kN.
Last updated: 2026-11
Specifications
A straight slotted spring pin — also known as a roll pin — is hollow and split along the full length of the pin. Its resting diameter is larger than the hole it goes into; when driven in, the pin compresses to fit, then tries to expand back, pressing against the hole wall so the fit tightens under shock and vibration rather than loosening. At least one end is chamfered for insertion. DIN 1481 covers the heavy-type series and its ISO equivalency is ISO 8752. The collected table runs the dimension series 1, 1.5, 2, 2.5, 3, 3.5, 4, 4.5, 5, 6, 8, 10, 12, 13 mm with D1 min/max, bore D2 and wall S per size, plus single- and double-shear forces by diameter — sampled values are in the specification below. Spring pins suit joints that must tolerate shock, vibration and repeated insertion; where alignment must hold rigidly under a press fit, the solid parallel dowel pin (DIN 7 / ISO 2338) is the complementary choice.
| Standard | DIN 1481, heavy type — ISO equivalency ISO 8752 (straight slotted spring pins / roll pins) |
|---|---|
| Dimension series | 1, 1.5, 2, 2.5, 3, 3.5, 4, 4.5, 5, 6, 8, 10, 12, 13 mm |
| D1 (pin diameter, min/max by size) | min 1.2 / 1.7 / 2.3 / 2.8 / 3.3 / 3.8 / 4.4 / 4.9 / 5.4 / 6.4 / 8.5 / 10.5 / 12.5 / 13.5 mm; max 1.3 / 1.8 / 2.4 / 2.9 / 3.5 / 4 / 4.6 / 5.1 / 5.6 / 6.7 / 8.8 / 10.8 / 12.8 / 13.8 mm |
| D2 (recommended bore, approx) | 0.8, 1.1, 1.5, 1.8, 2.1, 2.3, 2.8, 2.9, 3.4, 3.9, 5.5, 6.5, 7.5, 8.5 mm (by dimension series) |
| S (wall thickness, by size) | 0.2, 0.3, 0.4, 0.5, 0.6, 0.75, 0.8, 1, 1, 1.25, 1.5, 2, 2.5, 2.5 mm |
| Single shear force (by size) | 0.35, 0.79, 1.41, 2.19, 3.16, 4.53, 5.62, 7.68, 8.77, 13, 21.4, 35.1, 52.1, 57.6 kN — series range 0.35–57.6 kN |
| Double shear force (by size) | 0.7, 1.58, 2.82, 4.38, 6.32, 9.06, 11.2, 15.4, 17.5, 26, 42.8, 70.2, 104, 115 kN — series range 0.7–115 kN |
| Construction | Hollow, split along the full pin length; at least one end chamfered for insertion; holding force comes from the pin pressing back against the bore wall |
| MOQ / lead time | Not owner-confirmed for this family — confirmed at quotation |
Materials
- Steel (spring pin grades per the collected chemistry table)
- Stainless steel (austenitic groups per the collected ISO 3506-style table; 301 stainless named in the collected stock table)
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 1481 / ISO 8752 Slotted Spring Pins (Heavy Type)) 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 quantities and lead times for this family are confirmed at quotation — send your sizes, grades and quantities on the RFQ and the quote will carry a firm schedule. Sample availability is confirmed with the 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
What hole size does a DIN 1481 spring pin need?
The pin is sized by the hole: the collected table lists a recommended bore D2 for every dimension series — dimension 4.5 → D2 approx 2.9 mm, dimension 6 → 3.9 mm, dimension 8 → 5.5 mm, dimension 10 → 6.5 mm. Take the bore from the table row of the pin dimension, drill to it, and the compressed pin supplies the holding force. If the hole is already drilled and fixed, select the pin dimension whose D2 matches it.
How much shear load does a slotted spring pin carry?
The collected DIN 1481 / ISO 8752 table lists single- and double-shear force per dimension: single shear runs 0.35 kN at dimension 1 up to 57.6 kN at dimension 13; double shear runs 0.7 kN up to 115 kN across the same series. Double shear means the pin is loaded across two shear planes (a fork/clevis joint) and carries roughly twice the single-shear figure at the same size. Use the table value for the specific dimension as the reference figure and confirm the joint arrangement on the RFQ.
What should an RFQ for these pins state?
State the pin type (parallel dowel pin or slotted spring pin), the standard designation (DIN 7 / ISO 2338 or DIN 1481 / ISO 8752), nominal diameter and length, tolerance class where the drawing names one (m6 or h6 for dowel pins), material (steel property class or stainless grade), and quantity per size — plus destination country. Commercial terms are confirmed 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