Panduit HSTT-YK2 Dry-Shrink Thin-Wall Heat Shrink Tubing — Single Piece, Black, 0.38–1 In. Diameter Range

Overview

The Panduit HSTT-YK2 is a single 6-inch piece of Dry-Shrink™ thin-wall heat shrink tubing in black, engineered from crosslinked polyolefin and rated for applied diameters ranging from 0.38 in. (9.7 mm) up to 1 in. (25.4 mm). At roughly half a foot of finished length, this is the right pick when you need a pre-cut, per-piece format — no cutting, no waste — for splices, wire bundles, and termination points in dry indoor environments. The HSTT-YK2 (often searched as HSTT YK2) ships individually (Package Qty: 1) and is also available by the carton in quantities of 10 for higher-volume installs.

The Panduit heat shrink and wire management line uses crosslinked polyolefin as its core material across most thin-wall shrink tubing SKUs — the crosslinking step is what separates a tubing that holds dimensional integrity under sustained heat from one that can migrate or crack over time. For dry-environment terminations in control panels, junction boxes, and wire harnesses, the HSTT-YK2 delivers that durability at a per-piece price point that makes it easy to stock without committing to full spools or long-length inventory.

Key Features

• Wide Diameter Range — 0.38 in. to 1 in. (9.7 mm to 25.4 mm): A single SKU covers wire and cable terminations from small signal leads up through heavier power conductors near 1-inch OD — reducing the number of tubing part numbers you need to stock for mixed-gauge applications in a single enclosure.
• Crosslinked Polyolefin Construction: Crosslinking adds molecular bonds that prevent the tubing from re-melting or distorting after shrink, so the sleeve stays put even if it sees elevated ambient temperature over a sustained period. For control panel wiring in environments that cycle between warm and cool, this matters more than standard polyolefin.
• 6-Inch Pre-Cut Length (0.5 ft / 0.15 m): Pre-cut pieces eliminate the field step of measuring and cutting from bulk rolls. On a tight termination bench or inside a populated panel, a ready-to-use 6-inch section is faster and produces more consistent coverage length across a set of conductors.
• Dry-Shrink™ Sub-Brand — Dry Environment Rated: The Dry-Shrink designation confirms this tubing is rated for dry indoor applications — control rooms, telecom closets, electrical panels, and structured cabling environments. If your installation includes outdoor exposure, direct UV, or standing moisture, you'll want a tubing rated for those conditions instead.
• UL Recognized, CSA Certified, MIL SPEC Compliant: Three standards on a single piece of heat shrink carries real weight on wire management applications that touch inspection or compliance. UL Recognized and CSA Certified satisfy most North American panel and equipment builder requirements; MIL SPEC compliance adds a layer of material and performance verification relevant to defense, aerospace, and demanding industrial accounts.
• Black Color — Single Package Quantity: Black tubing is the default choice for most applications where color-coding isn't required — it reads cleanly in photos and panels, and provides some UV stabilization benefit versus clear or light-colored alternatives. The per-piece (Qty: 1) packaging lets procurement include exactly what a job requires without minimum-order overage.
• Carton Quantity of 10 Available: For integrators running multiple panels or harness builds, the 10-piece carton format bundles stocking in a practical field quantity without committing to full-spool inventory.

Integration & Compatibility

The HSTT-YK2 is a wire protection component in Panduit's broader wire routing, management, and protection catalog. It is dimensionally compatible with copper and aluminum conductors, shielded cables, and twisted pairs where the finished OD falls in the 0.38–1 in. range. The MIL SPEC rating makes it a candidate for applications requiring documentation of material standards. A competing reference part is FIT-221-MS-3 for sourcing cross-reference purposes.

For installers building out structured termination environments, this tubing pairs naturally with Panduit cable ties, label holders, and wire duct — all part of a cable management system approach where every element is traceable to a single vendor's spec sheet.

What's in the Box

• 1x Panduit HSTT-YK2 Dry-Shrink™ thin-wall heat shrink tubing piece, 6 in. length, black, 0.38–1 in. diameter range

Frequently Asked Questions

Q: What is the applied diameter range of the HSTT-YK2?

A: The HSTT-YK2 covers applied diameters from 0.38 in. (9.7 mm) to 1 in. (25.4 mm), making it suitable for a range of conductor and cable ODs within a single piece.

Q: Is the HSTT-YK2 rated for outdoor or wet environments?

A: No. The Dry-Shrink™ designation means this tubing is rated for dry indoor environments. Applications with outdoor exposure, UV, or moisture ingress require a tubing rated specifically for those conditions.

Q: What certifications does the HSTT-YK2 carry?

A: The HSTT-YK2 meets UL Recognized, CSA Certified, and MIL SPEC standards — sufficient for most North American panel builder and defense/industrial compliance requirements.

Q: What is the length of a single HSTT-YK2 piece?

A: Each piece is 6 inches (0.5 ft / 0.15 m) in length, pre-cut — no field cutting required.

Q: How is the HSTT-YK2 packaged, and is a carton quantity available?

A: The HSTT-YK2 ships in a Package Quantity of 1 (single piece). A Carton Quantity of 10 is also available for higher-volume purchasing.

Q: What material is the HSTT-YK2 made from?

A: The HSTT-YK2 is constructed from crosslinked polyolefin — the crosslinking process bonds the polymer chains for improved dimensional stability and resistance to re-melting after shrink compared to non-crosslinked alternatives.

Marty Allison

The HSTT-YK2 is one of those components that looks trivial in a BOM until you're standing at a termination bench trying to find a piece of heat shrink that actually fits a 0.38-to-1-inch diameter range without hunting through four SKUs. The crosslinked polyolefin construction means that once this sleeve is shrunk down, it's not going anywhere — the crosslinking step adds dimensional lock that matters when the enclosure sees thermal cycling.

Technical Highlights:

• 0.38–1 In. Diameter Range: One SKU handles conductors from small signal leads up through near-1-inch power cable ODs — cuts SKU proliferation on mixed-gauge panel builds significantly.
• Pre-Cut 6 In. Length: At 0.5 ft per piece, the HSTT-YK2 eliminates field measuring and produces consistent coverage across a termination set — a real time-saver on dense harness work inside populated enclosures.
• UL Recognized / CSA / MIL SPEC: Three certifications on a single tubing SKU means this part clears compliance documentation requirements for North American panel builders and defense/industrial accounts without sourcing a specialty alternative.

Deployment Considerations:

• The Dry-Shrink™ rating is strictly a dry-environment designation — do not specify the HSTT-YK2 for outdoor raceways, wet locations, or any installation with direct moisture exposure. Pulling the wrong tubing into an outdoor junction box is a rework call waiting to happen.
• Package Quantity is 1 piece — confirm your sourcing quantities against Carton Qty 10 if you're fitting out a multi-panel installation. Per-piece pricing at scale adds up; the carton format is the right buy for any job with repetitive termination counts.

The HSTT-YK2 is the right call for indoor control panel and wire harness work where you need MIL SPEC traceability, crosslinked dimensional stability, and a single tubing SKU that spans the common conductor OD range without maintaining a drawer full of separate sizes.