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The Series 20 Short Insert has the exact same body style as the Series 19 Short - with the addition of a head. The slightly tapered body is designed for use in straight holes to yield maximum performance with low radial stress. Seating and installation are facilitated with a pilot and a tapered knurl and groove design. The head provides more bearing surface for the mating component to prevent jack-out. The Series 20 Short Headed Insert is available in inch threads ranging from 2-56 up to ¼-20.

If you don’t see what you are looking for in our standard offering (including thread size, length, quantity, etc.), please feel free to contact SPIROL directly at or call any one of our global offices for complimentary Application Engineering assistance!

Unit of Measure

Supply Status

N/A Stocked

Units per Box

N/A 1

Thread Size

N/A 4-40

Overknurl Ø (A Ref.)

N/A .182 in

Head Ø (H)

N/A .216 in

Head Thickness (T)

N/A .021 in

Length (L)

N/A .140 in

Pilot Ø (P)

N/A .154 in

Rec. Hole Ø

N/A .157 in

Rec. Hole Ø Tolerance

N/A +.003/-.000 in

Material Type

N/A Brass

Material Grade

UNS C36000
EN 12164 CW603N CuZn36Pb3


N/A Plain

Weight Per Piece

N/A 0.0003005 kg0.0006625 lb