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SPIROL’s Series 28 Long Headed Metric Inserts are designed for straight holes with a 1° maximum (included) draft angle and are typically installed with heat or ultrasonic vibration. The Series 28 Long Inserts are similar to the Series 27 Long Inserts with the addition of a head for increased bearing area. The Series 28 Long Headed Inserts have the same body style as the standard Series 30 Long Headed Inserts with a reduced center knurl diameter for plastic assemblies where the boss diameter is less than 2x the body diameter of the Insert. The Series 28 also comes in a Short version to reduce costs and installation time for applications requiring less demanding torque and/or pull-out resistance. The SPIROL’s Series 28 Headed Metric Inserts are available to order in thread sizes ranging from M2 up to M8.

If you would like assistance in selecting the most appropriate Insert for your application, please contact SPIROL for complimentary technical support.

Unit of Measure

Package Type

 N/A Each

Supply Status

 N/A Not Stocked

Units Per Package

 N/A 1

Thread Size

 N/A M2 x 0.4

Overknurl Ø (A Ref.)

 N/A 3.56 mm

Head Ø (H)

 N/A 4.70 mm

Head Thickness (T)

 N/A 0.46 mm

Length (L)

 N/A 3.99 mm

Pilot Ø (P)

 N/A 3.12 mm

Rec. Hole Ø

 N/A 3.20 mm

Rec. Hole Ø Tolerance

 N/A +0.08/-0.00 mm

Material Type

 N/A Brass

Material Grade

 N/A ASTM B16
UNS C36000
EN 12164 CW603N CuZn36Pb3

Finish

 N/A Plain

Weight Per Piece

 N/A 0.0002372 kg0.000523 lb

Order Processing Note

 N/A Orders typically ship in 2-3 business days. Orders received after 3pm EST will be processed on the next business day.