D-Sub, D-Shaped Connectors - Accessories

D-Sub, D-Shaped Connectors - Accessories - Jackscrews

Part Number	Description / PDF	Quantity
40-98442F-C Vitelec / Cinch Connectivity Solutions	CONN D-SUB SCREWLOCK 4-40 1=50	36
40-9844T-C Vitelec / Cinch Connectivity Solutions	CONN JACKSCREW 1=SET OF 50	48
D20419-40 Vitelec / Cinch Connectivity Solutions	CONN DSUB PLUG	0
40-98440F-C Vitelec / Cinch Connectivity Solutions	CONN D-SUB SCREWLOCK FEMALE 1=50	0
40-98440F Vitelec / Cinch Connectivity Solutions	CONN D-SUB SCREWLOCK FEMALE	174
D20418-42 Vitelec / Cinch Connectivity Solutions	SCREWLOCK FEMALE 4-40	0
40-9844T Vitelec / Cinch Connectivity Solutions	CONN JACKSCREW	108
D20419-46 Vitelec / Cinch Connectivity Solutions	CONN DSUB PLUG	5
40-98442F Vitelec / Cinch Connectivity Solutions	CONN D-SUB SCREWLOCK FEMALE	290
D20420-0 Vitelec / Cinch Connectivity Solutions	JACK SCREW MALE W/ CLIP 4-40	0
D20419-0 Vitelec / Cinch Connectivity Solutions	JACKSCREW MALE W/CLIP 4-40	0
4-40THMB-1 Vitelec / Cinch Connectivity Solutions	HARDWARE THUMB SCREW 4-40	0
D20419-21 Vitelec / Cinch Connectivity Solutions	JACK SCREW MALE W/ CLIP 4-40	0
D20418-39 Vitelec / Cinch Connectivity Solutions	D-20418-39	0
D20419-18 Vitelec / Cinch Connectivity Solutions	JACK SCREW MALE W/ CLIP 4-40	0
D20420-42 Vitelec / Cinch Connectivity Solutions	CONN DSUB PLUG	0
4-40UNC2AX3/4H Vitelec / Cinch Connectivity Solutions	SCREW 4-40 X 3/4 SPC PAN HD STL	0
D20418-2 Vitelec / Cinch Connectivity Solutions	SCREWLOCK FEMALE 4-40	0

D-Sub, D-Shaped Connectors - Accessories - Jackscrews

1. Overview

D-Sub (D-Subminiature) connectors are D-shaped metallic shell electrical connectors widely used in computing, industrial equipment, and communication systems. They feature polarized designs to prevent misalignment and provide stable signal transmission. Jackscrews are threaded fastening components used to secure D-Sub connectors to mating interfaces, ensuring mechanical stability and electrical continuity. These components remain critical in legacy systems and specialized applications despite the rise of modern alternatives like USB and HDMI.

2. Main Types & Functional Classification

Type	Functional Features	Application Examples
Standard D-Sub	9-104 contacts, 5:2 shell ratio, screw locking	RS-232 serial ports, industrial controls
High-Density D-Sub	Double-row contacts, 37-104 pins	High-speed data acquisition systems
Micro D-Sub	Miniaturized design (13-52 contacts)	Aerospace sensors, medical imaging
Threaded Jackscrews	6-48 UNC threads, captive or free-floating	Secure panel mounting in vibration environments
Quick-Lock Jackscrews	Non-threaded latching mechanisms	Rapid maintenance scenarios in broadcast equipment

3. Structure & Composition

D-Sub connectors consist of a conductive metal shell (aluminum or steel), multiple signal contacts (phosphor bronze with gold plating), and dielectric insulators (thermoplastic or ceramic). Jackscrews integrate threaded shafts (stainless steel or brass), washer systems, and mounting flanges. Connector shells often feature EMI shielding coatings, while jackscrews may include knurled grips for manual tightening.

4. Key Technical Specifications

Parameter	Importance
Contact Current Rating (1-13A)	Determines power handling capability
Voltage Withstand (100-1000V)	Ensures insulation reliability
Contact Resistance (<10m )	Impacts signal integrity
Temperature Range (-55 C to +125 C)	Defines operational environment limits
Jackscrew Torque (3-15 in-lb)	Prevents over-tightening damage
Material Corrosion Resistance	Extends service life in harsh conditions

5. Application Fields

Primary industries include industrial automation (programmable logic controllers), avionics (flight control panels), medical equipment (diagnostic imaging machines), and broadcast systems (video routers). Legacy computer systems (CNC machines) and military communications equipment remain significant deployment areas.

6. Leading Manufacturers & Products

Manufacturer	Representative Products
TE Connectivity	DEUTSCH D-Sub series, ARINC 404 jackscrews
Amphenol	97 Series high-vibration connectors, captive jackscrew kits
Molex	MicroChange D-Sub connectors, quick-lock assemblies
Samtec	High-speed D-Sub solutions, gold-plated jackscrews

7. Selection Recommendations

Key considerations: contact density requirements, environmental conditions (temperature/vibration), EMI shielding needs, and compliance with standards (MIL-DTL-24308, IEC 60087). For high-vibration environments, specify jackscrews with anti-backout features. Aerospace applications require lightweight composite shells, while industrial settings prioritize corrosion-resistant platings.

8. Industry Trends

Current developments focus on hybrid connectors integrating D-Sub with fiber optics, nanocoatings for extreme environments, and miniaturized designs maintaining backward compatibility. The market is shifting toward high-speed differential signaling capabilities (up to 10Gbps) while maintaining legacy form factors for equipment retrofits.