Cisco STACK-T1-50CM Thumbscrews

sfein · ‎11-12-2025

I have a customer who is struggling with the Thumbscrews that are used to secure these cables to the routers. I am trying to find out if there is a part number associated with them and if it is possible to purchase replacement screws. Or if there is an off market brand any one can suggest?

dpadill2 · ‎11-15-2025

Those pieces come together at the stack cables. You could also check the guide for the hardware installation, but there isn't a section for that specific screw. It might be easier to replace the entire stack cable rather than searching for that individual screw.

StackWise Accessories

All Cisco stack cables are halogen-free. The StackWise cables of lengths 0.5 m, 1 m and 3 m supported. You can order the stacking cables from your Cisco sales representative.

Table 1. Cisco StackWise-480 and StackWise-1T Accessories for C9300 and C9300X Series Switches
Product ID	Product Description
STACK-T1-50CM	50 cm stacking cable for Cisco StackWise-480 and Cisco StackWise-1T
STACK-T1-1M	1 m stacking cable for Cisco StackWise-480 and Cisco StackWise-1T
STACK-T1-3M	3 m stacking cable for Cisco StackWise-480 and Cisco StackWise-1T

The optional StackWise-320 kit for Catalyst 9300L and 9300LM Series models consists of two stack adapters and a stacking cable. The default stacking cable is 0.5 m, however options of 1m and 3m are also available.

Table 2. Cisco StackWise-320 Accessories for C9300L Series Switches
Product ID	Product Description
C9300L-STACK	Stacking adapter for C9300L Series Switches that is used in conjunction with STACK-T3 type cables
C9300L-STACK-A	Stacking adapter for C9300L and C9300LM Series Switches that is used in conjunction with STACK-T3A type cables
STACK-T3-50CM	50 cm stacking cable for C9300L Series Switches
STACK-T3-1M	1 m stacking cable for C9300L Series Switches
STACK-T3-3M	3 m stacking cable for C9300L Series Switches
STACK-T3A-50CM	50 cm stacking cable for C9300L and C9300LM Series Switches
STACK-T3A-1M	1 m stacking cable for C9300L and C9300LM Series Switches
STACK-T3A-3M	3 m stacking cable for C9300L and C9300LM Series Switches

Note

C9300L Series Switches use both T3 and T3A type stacking cables.

The optional StackWise-320 kit for Catalyst 9300L and 9300LM Series models consists of two stack adapters and a stacking cable. The default stacking cable is 0.5 m, however options of 1m and 3m are also available.

Table 3. Cisco StackWise-320 Accessories for C9300LM Series Switches
Product ID	Product Description
C9300L-STACK-A	Stacking adapter for C9300L and C9300LM Series Switches that is used in conjunction with STACK-T3A type cables
STACK-T3A-50CM	50 cm stacking cable for C9300L and C9300LM Series Switches
STACK-T3A-1M	1 m stacking cable for C9300L and C9300LM Series Switches
STACK-T3A-3M	3 m stacking cable for C9300L and C9300LM Series Switches

Note

C9300LM Series Switches use only T3A type stacking cables.

Table 4. StackWise Cables Minimum Bend Radius and Coiled Diameter
Cable Part Number	Cable Length	Minimum Bend Radius	Minimum Coiled Diameter
STACK-T1-50CM	1.64 feet (0.5 m)	1.6 in. (41 mm)	Not applicable
STACK-T1-1M	3.28 feet (1.0 m)	1.6 in. (41 mm)	5.2 in. (132 mm)
STACK-T1-3M	9.84 feet (3.0 m)	3.2 in. (82 mm)	7.17 in. (182 mm)
STACK-T3-50CM	1.64 feet (0.5 m)	1.6 in. (41 mm)	Not applicable
STACK-T3-1M	3.28 feet (1.0 m)	1.6 in. (41 mm)	5.20 in. (132 mm)
STACK-T3-3M	9.84 feet (3.0 m)	3.2 in. (82 mm)	7.17 in. (182 mm)
STACK-T3A-50CM	1.64 feet (0.5 m)	1.6 in. (41 mm)	Not applicable
STACK-T3A-1M	3.28 feet (1.0 m)	1.6 in. (41 mm)	5.20 in. (132 mm)
STACK-T3A-3M	9.84 feet (3.0 m)	3.2 in. (82 mm)	7.17 in. (182 mm)

With a 0.5 m cable, the minimum coiled diameter is negligible and the cable cannot be physically coiled without exceeding the bending limit.

https://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst9300/hardware/install/b_c9300_hig/connector-cable-specs.html

Leo Laohoo · ‎11-16-2025

Don't worry about them:

1. FREE to RMA the stacking cables when they are faulty.

2. There are many stacking cables available in the gray/used markets.

3. The new 9350 uses a different cable and is not compatible with the old stacking cable.

tinil · ‎11-18-2025

The screws aren’t available as a separate Cisco spare, they come only as part of the full cable assembly. The simplest fix is to open an RMA for the affected cables.