scope:

This specification is approved for use by all Departments and Agencies of the Department of Defense.

The requirements for acquiring the product described herein shall consist of this specification sheet and the issue of the following specification listed in that issue of the Department of Defense Index of Specifications and Standards (DODISS) specified in the solicitation: MIL-C-24640.

CONSTRUCTION (Watertight) FIRST - 7 strand copper conductor in accordance with ASTM B-286, tinned strands in accordance with ASTM B-33. AWG size and dimensions in accordance with Table I. SECOND - Insulation material and basic construction requirements shall be in accordance with MIL-W-81044/12 and tested in accordance with the component wire ratings and requirements listed on this slash sheet. Quality conformance testing shall be in accordance with Table VI of MIL-C-24640. THIRD - Two conductors, one black and one white, twisted together. The pitch shall be 1 " ± ¼" (inch). FOURTH - Binder tape applied helically with overlap, at manufacturer's option. FIFTH - Braided shield of # 38 AWG tin coated copper strands. Braid coverage shall be no less than 90% determined in accordance with MIL-C-27500. SIXTH - Shield insulation of two polyester tapes or polyester tape and extruded jacket. Identification codes applied using Method 2. (NOTE: This step is not required for types 2XSW1 or 2XSWA1)

SEVENTH - The required number of shielded, twisted pairs shall be cabled together. Cabling sequence shall be consecutive, starting with number 1 from center outward. Fillers may be used as necessary, to form a round cable. EIGHTH - Binder tape applied helically with overlap. CONSTRUCTION VARIANT FOR TYPE 2XSW NINTH - Crosslinked polyolefin jacket. (See Table II for thickness). CONSTRUCTION VARIANT FOR TYPE 2XSWA NINTH - Crosslinked polyolefin jacket. (See Table III for thickness). TENTH - Braided metal armor. Dimensions in accordance with Table III. CONSTRUCTION VARIANT FOR TYPE 2XSOW NINTH - Braided shield, tin coated copper strands. Braid must be constructed to meet Surface Transfer Impedance requirements as listed herein. TENTH - Binder tape applied helically with overlap. ELEVENTH - Crosslinked polyolefin jacket. (See Table IV for thickness).

TABLE II. Construction details.

Jacket Cable Cable Number thickness diameter weight PIN Type of (inch) (inch) (pounds M24640/16 number pairs (minimum min max per 1000 feet) (max) --------------------------------------------------------------------- -01UN 2XSW-1 1 0.034 0.240 0.258 52.9 -02UN 2XSW-3 3 .041 .436 .470 175.0 -03UN 2XSW-7 7 .044 .573 .617 330.0

TABLE III. Construction details - armored.

Jacket Cable Cable Number thickness diameter weight PIN Type of (inch) (inch) (pounds M24640/16 number pairs (minimum min max per 1000 feet) (max) ------------------------------------------------------------------ -01AN 2XSWA-1 1 0.034 0.290 0.308 68.9 -02AN 2XSWA-3 3 .041 .486 .520 210.4 -03AN 2XSWA-7 7 .044 .623 .667 375.2

TABLE IV. Construction details - overall shield.

Diameter Jacket Cable Cable Number over thickness diameter weight PIN Type of shield (inch) (inch) (pounds M24640/16 number pairs (inch) (minimum min max per (nom) 1000 feet) (max) ------------------------------------------------------------------------------ -01UO 2XSOW-3 3 0.374 0.041 0.487 0.525 227.0 -02UO 2XSOW-7 7 .514 .044 .608 .656 401.0 -03UO 2XSOW-12 12 .702 .047 .802 .864 665.0 -04UO 2XSOW-19 19 .844 .050 .938 1.010 950.0 -05UO 2XSOW-30 30 1.080 .057 1.180 1.270 1442.0