The Molex 1731120330 is a thumb screw from the FRS, FCT series, designed as a jackscrew accessory for D-Sub backshells. It carries a 4-40 UNC thread — the standard thread for D-Sub hardware — with a threaded portion of 0.177" (4.50 mm) below the head. This length suits typical D-Sub backshell panel thicknesses up to about 4.5 mm, giving the screw enough bite to pull the connector halves together without bottoming out on the shell.
Molex 1731120330 FRS FCT Thumb Screw, 4-40 Thread
MPN1731120330
Active
Molex FRS FCT series thumb screw, 1731120330, 4-40 UNC thread, 0.177" threaded portion below head, bulk pack, for D-Sub backshells.
$1.3600Ref. price · indicative, final on quote
RoHSROHS3 Compliant
SeriesFRS, FCT
Source DocumentedChannel stated on listing & quote
Condition PhotosReal unit photos / video on request
WhatsApp AnswersFast human replies for stock & sourcing questions
Worldwide DispatchDHL/FedEx — transit quoted per order
Independent China distributor & sourcing agent· Listing updated Aug 2026
Specifications
| Parameter | Value |
|---|---|
| Series | FRS, FCT |
| Accessory type | Jackscrew, Thumb Screw |
| Package | Bulk |
| Connector size | 4-40 |
| For use with (Related products) | D-Sub Backshell |
| Length - threaded portion below head | 0.177\" (4.50mm) |
Product details
Frequently asked questions
Will the 1731120330 fit my D-Sub backshell?
The 1731120330 uses a 4-40 UNC thread with a 0.177" (4.50 mm) threaded portion below the head. It is intended for D-Sub backshells that accept 4-40 jackscrews — check that your backshell's thread spec matches 4-40 and that the clearance hole depth is at least 4.5 mm.