A complete travel length clutching adjuster for use with a headlamp, the complete travel length clutching adjuster comprising: a housing having a ball stud bore; a nose on an end of the housing, the nose including a plurality of discrete helically-shaped thread segments (42, 42A) wherein the thread segments (42, 42A) are biased towards the ball stud bore; a ball stud journaled by the ball stud bore for axial movement therethrough and passing through the nose of the housing, the ball stud having a threaded Portion, an unthreaded portion, a ball extending from a first end thereof, a drive spline portion proximate a second end thereof, an outbound annular travel barrier positioned between the threaded portion and the unthreaded portion of the ball stud, and an inbound annular travel barrier positioned between the threaded portion and the first end; wherein, in adjusting operation, rotation of the ball stud via the drive spline causes axial movement of the ball stud through the ball stud bore via threaded engagement of the threaded portion of the ball stud and thread segments (42, 42A) of the nose; wherein, in length of travel clutching operation where the ball stud is axially rotated through the ball stud bore and neither the outbound annular travel barrier or the inbound annular travel barrier is in abutment with the thread segments (42, 42A) of the nose, the receipt of an undue axial force of resistance on the ball stud results in outward deflection of the engaged thread segments (42, 42A), thereby allowing the threaded engagement between the threaded portion of the ball stud and the thread segments (42, 42A) of the nose to clutch; and wherein, in end of travel clutching operation where the ball stud is axially rotated and either the outbound annular travel barrier or inbound annular travel barrier is in abutment with the thread segments (42, 42A), a resultant outward deflection of the engaged thread segments (42, 42A) of the nose is provided, thereby allowing the threaded engagement between the threaded portion of the ball stud and the thread segments (42, 42A) of the nose to clutch, and optionally or preferably wherein the thread segments (42,42A) of the nose are integrated with a stiffening rib. a housing having a ball stud bore; a nose on an end of the housing, the nose including a plurality of discrete helically-shaped thread segments (42, 42A) wherein the thread segments (42, 42A) are biased towards the ball stud bore; a ball stud journaled by the ball stud bore for axial movement therethrough and passing through the nose of the housing, the ball stud having a threaded Portion, an unthreaded portion, a ball extending from a first end thereof, a drive spline portion proximate a second end thereof, an outbound annular travel barrier positioned between the threaded portion and the unthreaded portion of the ball stud, and an inbound annular travel barrier positioned between the threaded portion and the first end; wherein, in adjusting operation, rotation of the ball stud via the drive spline causes axial movement of the ball stud through the ball stud bore via threaded engagement of the threaded portion of the ball stud and thread segments (42, 42A) of the nose; wherein, in length of travel clutching operation where the ball stud is axially rotated through the ball stud bore and neither the outbound annular travel barrier or the inbound annular travel barrier is in abutment with the thread segments (42, 42A) of the nose, the receipt of an undue axial force of resistance on the ball stud results in outward deflection of the engaged thread segments (42, 42A), thereby allowing the threaded engagement between the threaded portion of the ball stud and the thread segments (42, 42A) of the nose to clutch; and wherein, in end of travel clutching operation where the ball stud is axially rotated and either the outbound annular travel barrier or inbound annular travel barrier is in abutment with the thread segments (42, 42A), a resultant outward deflection of the engaged thread segments (42, 42A) of the nose is provided, thereby allowing the threaded engagement between the threaded portion of the ball stud and the thread segments (42, 42A) of the nose to clutch, and optionally or preferably wherein the thread segments (42,42A) of the nose are integrated with a stiffening rib.