Comparable to 55A11X1, also known as SPEC 55, or 55A wire, which is the marketing name used by TE-Raychem for WC-27500 cable.
SPECS:

• MIL-DTL-27500 (NEMA WC27500)
• Conductor: M22759/32 tin plated copper wire, with cross-linked modified Tefzel insulation (XLETFE)
• Shield: Tin plated copper
• Jacket: Cross-linked modified Tefzel insulation (XLETFE)
• 600 V voltage rating
• +150° C temperature rating

			Applicable shield terminator
AWG size, # of Cond.	Nom. width*	P/N M27500-	CWT-series	S01/S02 M83519 series
22 AWG, 1C	1.85mm (.073")	22SB1T23	CWT-3-W122-5	S01-02-x S02-06-x
22 AWG, 2C	2.88mm (.113")	22SB2T23	CWT-5-W122-5	S01-03-x S02-08-x
22 AWG, 3C	3.03mm (.119")	22SB3T23
22 AWG, 4C	3.60mm (.142")	22SB4T23
22 AWG, 6C	4.07mm (.160")	22SB6T23
20 AWG, 1C	2.14mm (.084")	20SB1T23	CWT-3-W122-5	S01-02-x S02-07-x
20 AWG, 2C	3.34mm (.131")	20SB2T23	CWT-5-W122-5	S01-03-x S02-08-x
20 AWG, 3C	3.39mm (.133")	20SB3T23
20 AWG, 4C	4.02mm (.158")	20SB4T23

*Nom. width at widest point, as cross section varies in shape with conductor count

WC-27500 P/N	SPEC 55 P/N
M27500-22SB1T23	55A1111-22-9-9
M27500-22SB2T23	55A1121-22-9/96-9
M27500-22SB3T23	55A1131-22-9/96/93-9
M27500-22SB4T23	55A1141-22-9/93/95/96-9
M27500-22SB6T23	n/a
M27500-20SB1T23	55A1111-20-9-9
M27500-20SB2T23	55A1121-20-9/96-9
M27500-20SB3T23	55A1131-20-9/96/93-9
M27500-20SB4T23	55A1141-20-9/93/95/96-9