D-Sub Backshells – Mouser Liechtenstein

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X3 Precision-Machine One-Piece Threaded Backshells

Positronic X3 Precision-Machined One-Piece Threaded Backshells are designed for use with D-Sub connectors and circular M38999/AS85049 backshell accessories. These backshells deliver robust mechanical integrity and continuous 360° EMI shielding. The X3 threaded backshells are compatible with machined and stamped shells for standard, high, and mixed-density D-Sub connectors, including the Mach-D series. These backshells are available in six shell sizes with both standard and low-profile configurations. The X3 threaded backshells are housed in aluminum or stainless steel with multiple plating options and can be specified with fixed or rotating jackscrews. These backshells operate at -55°C to 125°C temperature range and are ideal for military, aero, spaceflight, and industrial applications.

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Image	Part #	Mfr.	Description	Datasheet	Availability	Pricing (CHF) Filter the results in the table by unit price based on your quantity.	Qty.	Type	Shell Size	Cable Entry Angle	Number of Cable Entries	Shell Material	Shell Plating	Number of Positions
D-Sub Backshells 15Backshell, Top Entry, Threaded, Low Profile, Fixed Female Jackpost, Conductive Electroless Nickel Finish D15000X3WLT20/AA Amphenol Positronic 1: CHF 354.96 7In Stock New Product	Mfr. Part No. D15000X3WLT20/AA Mouser Part No 276-D15000X3WLT20/AA New Product	Amphenol Positronic	D-Sub Backshells 15Backshell, Top Entry, Threaded, Low Profile, Fixed Female Jackpost, Conductive Electroless Nickel Finish Learn More about Amphenol Positronic positronic x3 precision machined backshells	Datasheet	7In Stock	CHF 354.96 CHF 301.77 CHF 287.29	Min.: 1 Mult.: 1	D-Sub Backshell	2	Straight	1 Entry	Aluminum	Nickel	15 Position
D-Sub Backshells 25Backshell, Top Entry, Threaded, Low Profile, Rotating Male Jackscrew, Conductive Electroless Nickel Finish D25000X3WLE0/AA Amphenol Positronic 1: CHF 367.20 7In Stock New Product	Mfr. Part No. D25000X3WLE0/AA Mouser Part No 276-D25000X3WLE0/AA New Product	Amphenol Positronic	D-Sub Backshells 25Backshell, Top Entry, Threaded, Low Profile, Rotating Male Jackscrew, Conductive Electroless Nickel Finish Learn More about Amphenol Positronic positronic x3 precision machined backshells	Datasheet	7In Stock	CHF 367.20 CHF 312.18 CHF 304.88	Min.: 1 Mult.: 1	D-Sub Backshell	3	Straight	1 Entry	Aluminum	Nickel	25 Position
D-Sub Backshells 25Backshell, Top Entry, Threaded, Low Profile, Fixed Female Jackpost, Conductive Electroless Nickel Finish D25000X3WLT20/AA Amphenol Positronic 1: CHF 376.91 7In Stock New Product	Mfr. Part No. D25000X3WLT20/AA Mouser Part No 276-D25000X3WLT20/AA New Product	Amphenol Positronic	D-Sub Backshells 25Backshell, Top Entry, Threaded, Low Profile, Fixed Female Jackpost, Conductive Electroless Nickel Finish Learn More about Amphenol Positronic positronic x3 precision machined backshells	Datasheet	7In Stock	CHF 376.91 CHF 320.43 CHF 313.16	Min.: 1 Mult.: 1	D-Sub Backshell	3	Straight	1 Entry	Aluminum	Nickel	25 Position
D-Sub Backshells 104Backshell, Top Entry, Threaded, Rotating Male Jackscrew, Conductive Electroless Nickel Finish D104000X3PLE0/AA Amphenol Positronic 1: CHF 455.68 10On Order New Product	Mfr. Part No. D104000X3PLE0/AA Mouser Part No 276-D104000X3PLE0/AA New Product	Amphenol Positronic	D-Sub Backshells 104Backshell, Top Entry, Threaded, Rotating Male Jackscrew, Conductive Electroless Nickel Finish Learn More about Amphenol Positronic positronic x3 precision machined backshells	Datasheet	10On Order	CHF 455.68 CHF 388.79	Min.: 1 Mult.: 1	D-Sub Backshell	6	Straight	1 Entry	Aluminum	Nickel	104 Position
D-Sub Backshells 104Backshell, Top Entry, Threaded, Fixed Female Jackpost, Conductive Electroless Nickel Finish D104000X3PLT20/AA Amphenol Positronic 1: CHF 454.43 10On Order New Product	Mfr. Part No. D104000X3PLT20/AA Mouser Part No 276-D104000X3PLT20AA New Product	Amphenol Positronic	D-Sub Backshells 104Backshell, Top Entry, Threaded, Fixed Female Jackpost, Conductive Electroless Nickel Finish Learn More about Amphenol Positronic positronic x3 precision machined backshells	Datasheet	10On Order	CHF 454.43 CHF 387.72	Min.: 1 Mult.: 1	D-Sub Backshell	6	Straight	1 Entry	Aluminum	Nickel	104 Position
D-Sub Backshells 104Backshell, Top Entry, Threaded, Low Profile, Rotating Male Jackscrew, Conductive Electroless Nickel Finish D104000X3WLE0/AA Amphenol Positronic 1: CHF 482.69 10Expected 11/11/2026 New Product	Mfr. Part No. D104000X3WLE0/AA Mouser Part No 276-D104000X3WLE0/AA New Product	Amphenol Positronic	D-Sub Backshells 104Backshell, Top Entry, Threaded, Low Profile, Rotating Male Jackscrew, Conductive Electroless Nickel Finish Learn More about Amphenol Positronic positronic x3 precision machined backshells	Datasheet	10Expected 11/11/2026	CHF 482.69 CHF 410.39	Min.: 1 Mult.: 1	D-Sub Backshell	6	Straight	1 Entry	Aluminum	Nickel	104 Position
D-Sub Backshells 104Backshell, Top Entry, Threaded, Low Profile, Fixed Female Jackpost, Conductive Electroless Nickel Finish D104000X3WLT20/AA Amphenol Positronic 1: CHF 481.30 10Expected 11/11/2026 New Product	Mfr. Part No. D104000X3WLT20/AA Mouser Part No 276-D104000X3WLT20AA New Product	Amphenol Positronic	D-Sub Backshells 104Backshell, Top Entry, Threaded, Low Profile, Fixed Female Jackpost, Conductive Electroless Nickel Finish Learn More about Amphenol Positronic positronic x3 precision machined backshells	Datasheet	10Expected 11/11/2026	CHF 481.30 CHF 409.21	Min.: 1 Mult.: 1	D-Sub Backshell	6	Straight	1 Entry	Aluminum	Nickel	104 Position
D-Sub Backshells 15Backshell, Top Entry, Threaded, Rotating Male Jackscrew, Conductive Electroless Nickel Finish D15000X3PLE0/AA Amphenol Positronic 1: CHF 371.86 10On Order New Product	Mfr. Part No. D15000X3PLE0/AA Mouser Part No 276-D15000X3PLE0/AA New Product	Amphenol Positronic	D-Sub Backshells 15Backshell, Top Entry, Threaded, Rotating Male Jackscrew, Conductive Electroless Nickel Finish Learn More about Amphenol Positronic positronic x3 precision machined backshells	Datasheet	10On Order	CHF 371.86 CHF 316.14	Min.: 1 Mult.: 1	D-Sub Backshell	2	Straight	1 Entry	Aluminum	Nickel	15 Position
D-Sub Backshells 15Backshell, Top Entry, Threaded, Fixed Female Jackpost, Conductive Electroless Nickel Finish D15000X3PLT20/AA Amphenol Positronic 1: CHF 370.56 10On Order New Product	Mfr. Part No. D15000X3PLT20/AA Mouser Part No 276-D15000X3PLT20/AA New Product	Amphenol Positronic	D-Sub Backshells 15Backshell, Top Entry, Threaded, Fixed Female Jackpost, Conductive Electroless Nickel Finish Learn More about Amphenol Positronic positronic x3 precision machined backshells	Datasheet	10On Order	CHF 370.56 CHF 315.04	Min.: 1 Mult.: 1	D-Sub Backshell	2	Straight	1 Entry	Aluminum	Nickel	15 Position
D-Sub Backshells 15Backshell, Top Entry, Threaded, Low Profile, Rotating Male Jackscrew, Conductive Electroless Nickel Finish D15000X3WLE0/AA Amphenol Positronic 1: CHF 391.11 10On Order New Product	Mfr. Part No. D15000X3WLE0/AA Mouser Part No 276-D15000X3WLE0/AA New Product	Amphenol Positronic	D-Sub Backshells 15Backshell, Top Entry, Threaded, Low Profile, Rotating Male Jackscrew, Conductive Electroless Nickel Finish Learn More about Amphenol Positronic positronic x3 precision machined backshells	Datasheet	10On Order	CHF 391.11 CHF 332.51	Min.: 1 Mult.: 1	D-Sub Backshell	2	Straight	1 Entry	Aluminum	Nickel	15 Position
D-Sub Backshells 25Backshell, Top Entry, Threaded, Rotating Male Jackscrew, Conductive Electroless Nickel Finish D25000X3PLE0/AA Amphenol Positronic 1: CHF 443.84 10On Order New Product	Mfr. Part No. D25000X3PLE0/AA Mouser Part No 276-D25000X3PLE0/AA New Product	Amphenol Positronic	D-Sub Backshells 25Backshell, Top Entry, Threaded, Rotating Male Jackscrew, Conductive Electroless Nickel Finish Learn More about Amphenol Positronic positronic x3 precision machined backshells	Datasheet	10On Order	CHF 443.84 CHF 377.36	Min.: 1 Mult.: 1	D-Sub Backshell	3	Straight	1 Entry	Aluminum	Nickel	25 Position
D-Sub Backshells 25Backshell, Top Entry, Threaded, Fixed Female Jackpost, Conductive Electroless Nickel Finish D25000X3PLT20/AA Amphenol Positronic 1: CHF 393.54 10On Order New Product	Mfr. Part No. D25000X3PLT20/AA Mouser Part No 276-D25000X3PLT20/AA New Product	Amphenol Positronic	D-Sub Backshells 25Backshell, Top Entry, Threaded, Fixed Female Jackpost, Conductive Electroless Nickel Finish Learn More about Amphenol Positronic positronic x3 precision machined backshells	Datasheet	10On Order	CHF 393.54 CHF 334.56	Min.: 1 Mult.: 1	D-Sub Backshell	3	Straight	1 Entry	Aluminum	Nickel	25 Position
D-Sub Backshells 37Backshell, Top Entry, Threaded, Rotating Male Jackscrew, Conductive Electroless Nickel Finish D37000X3PLE0/AA Amphenol Positronic 1: CHF 468.53 10On Order New Product	Mfr. Part No. D37000X3PLE0/AA Mouser Part No 276-D37000X3PLE0/AA New Product	Amphenol Positronic	D-Sub Backshells 37Backshell, Top Entry, Threaded, Rotating Male Jackscrew, Conductive Electroless Nickel Finish Learn More about Amphenol Positronic positronic x3 precision machined backshells	Datasheet	10On Order	CHF 468.53 CHF 398.35	Min.: 1 Mult.: 1	D-Sub Backshell	4	Straight	1 Entry	Aluminum	Nickel	37 Position
D-Sub Backshells 37Backshell, Top Entry, Threaded, Fixed Female Jackpost, Conductive Electroless Nickel Finish D37000X3PLT20/AA Amphenol Positronic 1: CHF 467.16 10On Order New Product	Mfr. Part No. D37000X3PLT20/AA Mouser Part No 276-D37000X3PLT20/AA New Product	Amphenol Positronic	D-Sub Backshells 37Backshell, Top Entry, Threaded, Fixed Female Jackpost, Conductive Electroless Nickel Finish Learn More about Amphenol Positronic positronic x3 precision machined backshells	Datasheet	10On Order	CHF 467.16 CHF 397.18	Min.: 1 Mult.: 1	D-Sub Backshell	4	Straight	1 Entry	Aluminum	Nickel	37 Position
D-Sub Backshells 37Backshell, Top Entry, Threaded, Low Profile, Rotating Male Jackscrew, Conductive Electroless Nickel Finish D37000X3WLE0/AA Amphenol Positronic 1: CHF 437.13 10On Order New Product	Mfr. Part No. D37000X3WLE0/AA Mouser Part No 276-D37000X3WLE0/AA New Product	Amphenol Positronic	D-Sub Backshells 37Backshell, Top Entry, Threaded, Low Profile, Rotating Male Jackscrew, Conductive Electroless Nickel Finish Learn More about Amphenol Positronic positronic x3 precision machined backshells	Datasheet	10On Order	CHF 437.13 CHF 371.66	Min.: 1 Mult.: 1	D-Sub Backshell	4	Straight	1 Entry	Aluminum	Nickel	37 Position
D-Sub Backshells 37Backshell, Top Entry, Threaded, Low Profile, Fixed Female Jackpost, Conductive Electroless Nickel Finish D37000X3WLT20/AA Amphenol Positronic 1: CHF 408.83 10On Order New Product	Mfr. Part No. D37000X3WLT20/AA Mouser Part No 276-D37000X3WLT20/AA New Product	Amphenol Positronic	D-Sub Backshells 37Backshell, Top Entry, Threaded, Low Profile, Fixed Female Jackpost, Conductive Electroless Nickel Finish Learn More about Amphenol Positronic positronic x3 precision machined backshells	Datasheet	10On Order	CHF 408.83 CHF 347.56	Min.: 1 Mult.: 1	D-Sub Backshell	4	Straight	1 Entry	Aluminum	Nickel	37 Position
D-Sub Backshells 50Backshell, Top Entry, Threaded, Rotating Male Jackscrew, Conductive Electroless Nickel Finish D50000X3PLE0/AA Amphenol Positronic 1: CHF 463.98 10Expected 10/22/2026 New Product	Mfr. Part No. D50000X3PLE0/AA Mouser Part No 276-D50000X3PLE0/AA New Product	Amphenol Positronic	D-Sub Backshells 50Backshell, Top Entry, Threaded, Rotating Male Jackscrew, Conductive Electroless Nickel Finish Learn More about Amphenol Positronic positronic x3 precision machined backshells	Datasheet	10Expected 10/22/2026	CHF 463.98 CHF 394.47	Min.: 1 Mult.: 1	D-Sub Backshell	5	Straight	1 Entry	Aluminum	Nickel	50 Position
D-Sub Backshells 50Backshell, Top Entry, Threaded, Fixed Female Jackpost, Conductive Electroless Nickel Finish D50000X3PLT20/AA Amphenol Positronic 1: CHF 462.66 10On Order New Product	Mfr. Part No. D50000X3PLT20/AA Mouser Part No 276-D50000X3PLT20/AA New Product	Amphenol Positronic	D-Sub Backshells 50Backshell, Top Entry, Threaded, Fixed Female Jackpost, Conductive Electroless Nickel Finish Learn More about Amphenol Positronic positronic x3 precision machined backshells	Datasheet	10On Order	CHF 462.66 CHF 393.34	Min.: 1 Mult.: 1	D-Sub Backshell	5	Straight	1 Entry	Aluminum	Nickel	50 Position
D-Sub Backshells 50Backshell, Top Entry, Threaded, Low Profile, Rotating Male Jackscrew, Conductive Electroless Nickel Finish D50000X3WLE0/AA Amphenol Positronic 1: CHF 432.12 10On Order New Product	Mfr. Part No. D50000X3WLE0/AA Mouser Part No 276-D50000X3WLE0/AA New Product	Amphenol Positronic	D-Sub Backshells 50Backshell, Top Entry, Threaded, Low Profile, Rotating Male Jackscrew, Conductive Electroless Nickel Finish Learn More about Amphenol Positronic positronic x3 precision machined backshells	Datasheet	10On Order	CHF 432.12 CHF 367.38	Min.: 1 Mult.: 1	D-Sub Backshell	5	Straight	1 Entry	Aluminum	Nickel	50 Position
D-Sub Backshells 50Backshell, Top Entry, Threaded, Low Profile, Fixed Female Jackpost, Conductive Electroless Nickel Finish D50000X3WLT20/AA Amphenol Positronic 1: CHF 408.56 10On Order New Product	Mfr. Part No. D50000X3WLT20/AA Mouser Part No 276-D50000X3WLT20/AA New Product	Amphenol Positronic	D-Sub Backshells 50Backshell, Top Entry, Threaded, Low Profile, Fixed Female Jackpost, Conductive Electroless Nickel Finish Learn More about Amphenol Positronic positronic x3 precision machined backshells	Datasheet	10On Order	CHF 408.56 CHF 347.35	Min.: 1 Mult.: 1	D-Sub Backshell	5	Straight	1 Entry	Aluminum	Nickel	50 Position
D-Sub Backshells 9Backshell, Top Entry, Threaded, Rotating Male Jackscrew, Conductive Electroless Nickel Finish D9000X3PLE0/AA Amphenol Positronic 1: CHF 369.00 10On Order New Product	Mfr. Part No. D9000X3PLE0/AA Mouser Part No 276-D9000X3PLE0/AA New Product	Amphenol Positronic	D-Sub Backshells 9Backshell, Top Entry, Threaded, Rotating Male Jackscrew, Conductive Electroless Nickel Finish Learn More about Amphenol Positronic positronic x3 precision machined backshells	Datasheet	10On Order	CHF 369.00 CHF 313.72	Min.: 1 Mult.: 1	D-Sub Backshell	1	Straight	1 Entry	Aluminum	Nickel	9 Position
D-Sub Backshells 9Backshell, Top Entry, Threaded, Fixed Female Jackpost, Conductive Electroless Nickel Finish D9000X3PLT20/AA Amphenol Positronic 1: CHF 367.65 10On Order New Product	Mfr. Part No. D9000X3PLT20/AA Mouser Part No 276-D9000X3PLT20/AA New Product	Amphenol Positronic	D-Sub Backshells 9Backshell, Top Entry, Threaded, Fixed Female Jackpost, Conductive Electroless Nickel Finish Learn More about Amphenol Positronic positronic x3 precision machined backshells	Datasheet	10On Order	CHF 367.65 CHF 312.57	Min.: 1 Mult.: 1	D-Sub Backshell	1	Straight	1 Entry	Aluminum	Nickel	9 Position
D-Sub Backshells 9Backshell, Top Entry, Threaded, Low Profile, Rotating Male Jackscrew, Conductive Electroless Nickel Finish D9000X3WLE0/AA Amphenol Positronic 1: CHF 367.90 10On Order New Product	Mfr. Part No. D9000X3WLE0/AA Mouser Part No 276-D9000X3WLE0/AA New Product	Amphenol Positronic	D-Sub Backshells 9Backshell, Top Entry, Threaded, Low Profile, Rotating Male Jackscrew, Conductive Electroless Nickel Finish Learn More about Amphenol Positronic positronic x3 precision machined backshells	Datasheet	10On Order	CHF 367.90 CHF 312.80	Min.: 1 Mult.: 1	D-Sub Backshell	1	Straight	1 Entry	Aluminum	Nickel	9 Position
D-Sub Backshells 9Backshell, Top Entry, Threaded, Low Profile, Fixed Female Jackpost, Conductive Electroless Nickel Finish D9000X3WLT20/AA Amphenol Positronic 1: CHF 323.14 10Expected 11/4/2026 New Product	Mfr. Part No. D9000X3WLT20/AA Mouser Part No 276-D9000X3WLT20/AA New Product	Amphenol Positronic	D-Sub Backshells 9Backshell, Top Entry, Threaded, Low Profile, Fixed Female Jackpost, Conductive Electroless Nickel Finish Learn More about Amphenol Positronic positronic x3 precision machined backshells	Datasheet	10Expected 11/4/2026	CHF 323.14 CHF 274.71	Min.: 1 Mult.: 1	D-Sub Backshell	1	Straight	1 Entry	Aluminum	Nickel	9 Position

X3 Precision-Machine One-Piece Threaded Backshells

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