TE Connectivity, 328 Spare Wire Cap Splice Connector, Blue, Insulated, Tin 16 AWG

PIDG wire caps for use with either stripped or unstripped wire ends. These PIDG wire caps consist of a precision-formed metal wire barrel containing serrations which provide maximum contact and tensile strength after crimping. This barrel is enclosed in a copper sleeve and the whole is encased in a nylon colour coded insulation sleeve:
Blue (stripped end wire caps - stock numbers 710-5332 and 719-6155): 1.25 - 2 mm² wire range
Yellow (stripped end wire caps - stock number 710-5345): 3 - 6 mm² wire range
Red (stripped end wire caps - stock number 710-5348): 0.3 - 0.9 mm² wire range
Blue (unstripped end wire caps - stock number 710-5335): 3.05 - 3.68 mm² insulation diameter
Yellow (unstripped end wire caps - stock number 718-7454): 3.81 - 5.59 mm² insulation diameter
Red (unstripped end wire caps - stock number 710-5339): 2.03 - 2.92 mm² insulation diameter
Transparent (unstripped end wire caps - stock number 710-5341): 1.22 - 1.91 mm² insulation diameter

For use with stripped or unstripped wire
Copper body with nylon insulation