A blood collection assembly, comprising: a first sub-assembly comprising, a hub comprising, a flash indicator, having a distal end and a proximal end engageable with a specimen collection container, a cannula extending between a patient end and a non-patient end, defining a cannula interior, the patient end of the cannula projecting at least partially from the distal end of the hub, the cannula interior in fluid communication with the flash indicator, a cannula shield removably engaged with the distal end of the hub and shielding at least the patient end of the cannula, and a pivoting safety shield fixedly engaged with a portion of the hub and transitionable from a retracted position in which the patient end is exposed, to an extended position in which the patient end is shielded by at least a portion of the safety shield; and a second sub-assembly comprising a specimen collection container holder having an interior through which a specimen collection container may be engaged with the proximal end of the hub, characterized in that the first sub-assembly further comprises a first portion for press-fit engagement with the second sub-assembly, and the second sub-assembly comprises a corresponding second portion for press-fit engagement with the first sub-assembly, and wherein the cannula shield comprises a safety shield engagement, and the safety shield comprises at least one locking tab releasably engageable with the safety shield engagement, wherein the locking tab is releasably engageable with the safety shield engagement in a restrained position and fixedly engageable with a portion of the housing in the extended position. a first sub-assembly comprising, a hub comprising, a flash indicator, having a distal end and a proximal end engageable with a specimen collection container, a cannula extending between a patient end and a non-patient end, defining a cannula interior, the patient end of the cannula projecting at least partially from the distal end of the hub, the cannula interior in fluid communication with the flash indicator, a cannula shield removably engaged with the distal end of the hub and shielding at least the patient end of the cannula, and a pivoting safety shield fixedly engaged with a portion of the hub and transitionable from a retracted position in which the patient end is exposed, to an extended position in which the patient end is shielded by at least a portion of the safety shield; and a second sub-assembly comprising a specimen collection container holder having an interior through which a specimen collection container may be engaged with the proximal end of the hub, a hub comprising, a flash indicator, having a distal end and a proximal end engageable with a specimen collection container, a cannula extending between a patient end and a non-patient end, defining a cannula interior, the patient end of the cannula projecting at least partially from the distal end of the hub, the cannula interior in fluid communication with the flash indicator, a cannula shield removably engaged with the distal end of the hub and shielding at least the patient end of the cannula, and a pivoting safety shield fixedly engaged with a portion of the hub and transitionable from a retracted position in which the patient end is exposed, to an extended position in which the patient end is shielded by at least a portion of the safety shield; and a second sub-assembly comprising a specimen collection container holder having an interior through which a specimen collection container may be engaged with the proximal end of the hub, characterized in that the first sub-assembly further comprises a first portion for press-fit engagement with the second sub-assembly, and the second sub-assembly comprises a corresponding second portion for press-fit engagement with the first sub-assembly, and wherein the cannula shield comprises a safety shield engagement, and the safety shield comprises at least one locking tab releasably engageable with the safety shield engagement, wherein the locking tab is releasably engageable with the safety shield engagement in a restrained position and fixedly engageable with a portion of the housing in the extended position.