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SPIROL’s Series 28 Short Headed 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 Short Headed Inserts are similar to the Series 27 Short Inserts with the addition of a head for increased bearing area. The Series 28 Headed Inserts have the same body style as the standard Series 30 Short 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 Inserts are also available in a Long version for applications requiring more demanding torque and/or pull-out resistance. The SPIROL’s Series 28 Headed Inserts are available to order in inch threads ranging in size from 2-56 up to ¼-20.

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 8-32

Overknurl Ø (A Ref.)

N/A .241 in

Head Ø (H)

N/A .278 in

Head Thickness (T)

N/A .033 in

Length (L)

N/A .185 in

Pilot Ø (P)

N/A .213 in

Rec. Hole Ø

N/A .221 in

Rec. Hole Ø Tolerance

N/A +.003/-.000 in

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 0.0007001 kg0.0015435 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.