Heyco 6501-20 IMPACT Socket Adapter, Square Drive 3/4 - 06501002036

Heyco 6501-20 IMPACT Socket Adapter, 3/4" Female x 1/2" Male Square Drive

Heyco 6501-20 (Code-No. 06501002036) is not a machine but an adapter - a short steel link between tool drive and socket. The large 3/4" female square goes onto the drive, the small 1/2" male square carries the socket. It steps the drive down from 3/4" to 1/2", opening up the smaller impact sockets.

This is impact kit, not a chrome adapter

Built to DIN 3121 / ISO 1174 in chrome-vanadium steel and phosphated - the matt black finish of impact sets. The phosphate absorbs the movement of every blow and stops galling. Chrome adapters look much the same but crack under an impact wrench.

Which machines it fits

Compatibility is read off the square drive, not off a machine model - there is no model in the article name. The adapter fits any tool with a 3/4" square drive: impact wrench, impact ratchet, breaker bar, T-bar or universal handle. At the other end it takes 1/2" impact sockets to the same standard - Heyco's 6300/6301 range and other brands alike, the fitting being standardised.

When to replace it and what to check

The adapter wears rather than expires. At every change check three things: the corners of both squares - a rounded edge means play, and play batters the next square in the chain; the retaining pin hole in the male end, which once worn drops the socket; and the surface, where bright patches show slipping and any crack retires the part on the spot. Only impact sockets go on it - a chrome socket under an impact wrench will shatter.

Technical specifications

On the manufacturer's data: the 4Kt innen column in the Heyco sheet is set against 1/2, yet the heading reads Verbindungsstück, 3/4" x 1/2" and a 44.0 mm diameter belongs to a 3/4" seat - so the large square is the 3/4" female one. The photograph is the manufacturer's and representative of the family („Abbildung ähnlich“).

Questions and Answers