D-Sub, D-Shaped Connectors - Accessories

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

Part Number	Description / PDF	Quantity
7266 Keystone Electronics Corp.	JACK SCREW HEX 4-40	9100
7260 Keystone Electronics Corp.	JACK SCREW HEX 4-40	989366600
M3236-3005-3005-12 RAF	METRIC HEX JACK SCREWS	382
340103218B C&K	340103218B	15
554043-1 TE Connectivity AMP Connectors	CONN STANDOFF M3.5 SCKT #6-32	31
7244 Keystone Electronics Corp.	JACK SCREW HEX 4-40	9663900
320-9505-000 VEAM	JACKPOST ASSEMBLY KIT MDM 9-51	3417
5205818-3 TE Connectivity AMP Connectors	CONN SCREW LOCKS FEMALE 4-40	18982
09670029008 HARTING	SHORT LOCKING SCREW 4-40 UNC	90
1731120014 Woodhead - Molex	FCT SCREW 4-40 UNC 12.7 ZINC PLA	257
09670019941 HARTING	SCREWLOCK 4-40 / 4-40 UNC	25091
09670009974 HARTING	DSUB SCREW-LOCK FE UNC/M3 11MM	80
1437012-5 TE Connectivity AMP Connectors	CONN IDC JACKSCREW ASSY	500
7229 Keystone Electronics Corp.	JACK SCREW HEX 4-40 1=2 SETS	2147483647
5554726-1 TE Connectivity AMP Connectors	SCREW,PAN HD, CPTV,SHLD CHAMP	3150
L17D20419EX Storage & Server IO (Amphenol ICC)	D-SUB ASSY SCREW LOCK ASSY 10PCS	378
863001061TLF Storage & Server IO (Amphenol ICC)	CONN SCREWLOCK DSUB FEML M3/4-40	1958
1727040158 Woodhead - Molex	FCT THMB SCREW 4-40 UNC 43.5	666
4750-6 RAF	3/16 HEX X 1/2 TL X 4-40 THD	585
09670019973 HARTING	DSUB LOCKING-BOLT UNC TIN	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.