DIN 7346 Light Duty Slotted Spring Pins (ISO 13337)
Light duty slotted spring pins follow the same rolled, slotted form as the standard DIN 1481 pattern but with a thinner wall, roughly half the standard section. The lighter spring force suits soft, brittle or thin host materials. We supply them in carbon steel and stainless steel, available across a range of sizes.
Also known as: light duty roll pin, thin wall spring pin, light duty spring pin, iso 13337, din 7346.
Materials & strength
Thin wall, lower insertion force
The wall is about half the thickness of a standard slotted pin, so the radial force on the hole is lower - the pin seats without cracking brittle castings or distorting thin sheet.
Same fitting practice as standard pins
The hole is drilled at nominal diameter to normal drilling tolerance, exactly as for the standard duty pattern - the two types interchange in the same hole.
Spacer and sleeve duties
The light section also serves as a spacer or liner - including sleeving a standard pin to make up an oversize or worn hole.
Related specificationsWhen should I pick light duty over standard slotted pins?
When the host material is the weak point - plastics, die castings, brittle or thin sections - or when the pin is locating rather than carrying load. For shear-loaded joints in steel, the standard DIN 1481 pattern is the default.
What hole do they need?
The same as the equivalent standard pin: drill at the nominal diameter with normal drilling tolerance, no reaming.
How do DIN 7346 and ISO 13337 relate?
Both cover the light duty slotted spring pin; ISO 13337 is the international designation for the same product and drawings may call up either.
Need DIN 7346 (ISO 13337) in a non-standard size or material?
Send us your drawing — specials quoted within 24 hours.