Barbed Pins

Product detail · Updated 10 October 2026

Product and application brief

Barbed pins are solid retaining parts with raised radial features along a cylindrical body. Their direction and engaged region matter. They are not threaded screws, knurled pins or hollow spring pins; a nominal diameter alone does not identify a suitable joint.

Product forms and reference names

Choice or field	What to identify
Headed, single insertion direction	SPIROL FH400 is an original maker example with a head, barb series and pilot. Specify the head/stop function, under-head length and the engaged region.
Headless, opposing-end barbs	SPIROL BP100 Press-N-Lok is a maker-specific double-ended construction for joining two plastic components. Each end has its own insertion direction; do not treat it as a generic single-direction headed pin.
Localised barbed region	The original catalogue illustrates positioning retention features to coincide with the retained member. Define the feature length/location and any smooth bearing or guiding region by drawing.

Barb direction and position

Specify which end enters which component, barb orientation, crest envelope, pitch/profile and axial extent from a named datum. Record smooth-body diameter and pilot geometry separately. A ring-like appearance alone does not establish the exact retaining profile or a manufacturer's drawing revision.

Plastic host is part of the specification

SPIROL describes its barbed forms for flexible plastics and cautions against brittle or highly filled plastics. Do not generalise this to every polymer or metal host. Give exact resin, filler and condition, wall section and hole construction for engineering review; no generic pull-out strength is offered here.

Axial retention is not anti-rotation

Radial barbs do not inherently prevent relative rotation, as the maker explains. State axial retention, torsional restraint and any intended movement separately. Where a component must pivot on a smooth region, define clearance and bearing requirements. Any rating or joint suitability requires selected-part and assembly evidence.

Assembly sequence and head function

The BP100 original flyer describes seating one end in the first housing, then bringing the second housing onto the exposed end. A headed form instead needs a specified stop and retained stack. These are construction distinctions, not a universal installation recipe; direction, support, access and acceptance criteria must come from the approved assembly.

Receiving hole and installation review

Provide hole diameter/tolerance, depth, entry geometry, blind or through condition and engagement in each member. The maker catalogue treats hole recommendations as application-dependent. Obtain a qualified process for the chosen material and geometry; this page gives no universal interference allowance, press force or tool compatibility.

Reference identity and neighbouring constructions

Use the selected maker series or controlled drawing and revision. The sources do not establish a blanket ISO/DIN equivalence for the barbed forms shown here. Grooved, straight/helical knurled and slotted/coiled spring-pin standards describe different constructions. Do not substitute by matching diameter or surface appearance.

Material, inspection and order boundaries

Specify actual grade, hardness/heat treatment where required, coating and finished dimensions. Request controlled inspection and assembly acceptance documents. Do not infer alloy, production method, certification or corrosion performance from the image. Supply feasibility, quantity, packing and delivery require quotation confirmation; removal and reuse require separate evidence.

Specification fields

Choice or field	What to identify
Identity	Barbed construction, selected maker/reference or drawing number and revision; headed or headless.
Body and ends	Smooth diameter, length and datum, head geometry if present, pilot/chamfer and end projection.
Barbs	Direction per end, crest envelope, profile/pitch, axial extent/location and controlled tolerances.
Receiving components	Resin/filler/condition, hole drawing, wall section, depth and retained-member stack.
Function	Separate axial, rotational and movement requirements; smooth guiding/bearing region if needed.
Assembly	Sequence, engagement per member, access/support, selected installation method and acceptance criteria.
Inspection and order	Material/finish, drawing/sample and documents, quantities/packing/destination; supplied-part feasibility and timing unconfirmed.

Common product questions

Do radial barbs guarantee anti-rotation?

No. Specify rotational restraint separately. A radial retaining profile is not a torque rating or a guarantee that two components cannot turn.

Is every plastic suitable for a barbed pin?

No. The original maker cautions against brittle and highly filled hosts for its described forms. The exact resin, geometry and process require engineering review.

Are opposing-end barbs the same as a headed pin?

No. Opposing ends enter separate components; a headed form has a different stop and stack arrangement. Identify the actual drawing and assembly sequence.

Can the pin be removed and reused?

Do not assume that. Obtain the selected design's removal method and reuse acceptance evidence; no repeated-installation guarantee is given here.

Product references

References checked 10 October 2026 identify structures, not FastenerBridge stock, certification or brand affiliation. Final requirements follow the selected specification. No universal dimensions, load rating or tightening torque is stated.