D-Sub Backshells – Mouser Switzerland

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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: 354.96 CHF 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	354.96 CHF 301.77 CHF 287.29 CHF	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: 367.20 CHF 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	367.20 CHF 312.18 CHF 304.88 CHF	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: 420.98 CHF 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	420.98 CHF 311.08 CHF 303.80 CHF	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: 455.68 CHF 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	455.68 CHF 388.79 CHF	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: 454.43 CHF 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	454.43 CHF 387.72 CHF	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: 482.69 CHF 10Expected 18/11/2026 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 18/11/2026	482.69 CHF 410.39 CHF	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: 481.30 CHF 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	481.30 CHF 409.21 CHF	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: 371.86 CHF 10Expected 18/11/2026 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	10Expected 18/11/2026	371.86 CHF 316.14 CHF	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: 370.56 CHF 10Expected 18/11/2026 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	10Expected 18/11/2026	370.56 CHF 315.04 CHF	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: 391.11 CHF 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	391.11 CHF 332.51 CHF	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: 443.84 CHF 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	443.84 CHF 377.36 CHF	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: 393.54 CHF 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	393.54 CHF 334.56 CHF	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: 468.53 CHF 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	468.53 CHF 398.35 CHF	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: 467.16 CHF 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	467.16 CHF 397.18 CHF	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: 437.13 CHF 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	437.13 CHF 371.66 CHF	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: 408.83 CHF 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	408.83 CHF 347.56 CHF	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: 463.98 CHF 10On Order 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	10On Order	463.98 CHF 394.47 CHF	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: 462.66 CHF 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	462.66 CHF 393.34 CHF	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: 432.12 CHF 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	432.12 CHF 367.38 CHF	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: 408.56 CHF 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	408.56 CHF 347.35 CHF	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: 369.00 CHF 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	369.00 CHF 313.72 CHF	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: 367.65 CHF 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	367.65 CHF 312.57 CHF	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: 367.90 CHF 10Expected 19/11/2026 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	10Expected 19/11/2026	367.90 CHF 312.80 CHF	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: 323.14 CHF 10Expected 19/11/2026 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 19/11/2026	323.14 CHF 274.71 CHF	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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X3 Precision-Machine One-Piece Threaded Backshells

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