Pemko ZTB-KIT Zinc Thru-Bolt P...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$43.50
Pemko Zinc Thru-Bolt Pack 1/4-20 x 1-5/8 Inch Astragal Hardware Kit

Pemko ZTB-KIT Zinc Thru-Bolt Pack 1/4-20 x 1-5/8 Inch Astragal Hardware Kit

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Model: ZTB-KIT-9

In Stock (leaves warehouse same day if ordered before 3pm ET)

$43.50
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Pemko Zinc Thru-Bolt Pack 1/4-20 x 1-5/8 Inch Astragal Hardware Kit

Professional Astragal Mounting Hardware Solution

The Pemko Zinc Thru-Bolt Pack provides essential mounting hardware for astragal installations on 6'8", 7'0", and 8'0"; doors. This comprehensive kit features 1/4-20 x 1-5/8 inch zinc thru-bolts with countersunk holes that are equally spaced for precise installation. Constructed from durable 1/8"; x 2"; galvannealed steel with included #6 x 1"; F.H.S.M. screws for secure mounting applications.

Professional Features & Benefits

  • Door Height Compatibility: Designed for 6'8", 7'0", and 8'0"; doors with precisely spaced mounting points for proper astragal alignment.
  • Precision Engineering: Countersunk holes are equally spaced to ensure professional installation and optimal hardware positioning.
  • Durable Construction: 1/8"; x 2"; galvannealed steel construction provides corrosion resistance and long-term durability.
  • Complete Hardware Kit: Includes 1/4-20 x 1-5/8 inch zinc thru-bolts plus #6 x 1"; F.H.S.M. screws for comprehensive installation solution.
  • Galvannealed Finish: Factory galvannealed steel finish provides enhanced corrosion protection for extended service life.
  • Multiple Pack Options: Available in standard pack configuration with nine-pack (ZTB-KIT9) and eleven-pack (ZTB-KIT1) options for various project requirements.

Technical Specifications

  • Department: Door Hardware
  • Product Category: Door Trim and Accessories
  • Product Group: Door Trim and Accessories
  • Product Model: ZTB-KIT
  • Product Subgroup: Astragals, Gaskets and Weatherstripping
  • Product Substrate: Zinc Alloy
  • Product Type: Astragals
  • Subcategory: Astragals

Professional Applications

  • Commercial Office Buildings
  • Educational Facilities
  • Healthcare Institutions
  • Retail Establishments
  • Industrial and Warehouse Facilities
  • Multi-Tenant Residential Properties
  • Government and Municipal Buildings

Why Choose Pemko Quality?

Pemko astragal hardware delivers professional-grade reliability with galvannealed steel construction and precision-engineered mounting components. The countersunk and equally spaced hole pattern ensures consistent installation results for demanding commercial applications where dependable performance is essential.

Product Specs

Product Group:
Door Trim and Accessories
Product Subgroup:
Astragals, Gaskets and Weatherstripping
Product Type:
Astragal
Subcategory:
Astragals
Product Model:
ZTB-KIT
Product Category:
Door Trim and Accessories
Department:
Door Hardware
Product Substrate:
Zinc Alloy

Pemko ZTB-KIT-9 – Frequently Asked Questions

1) Does the Pemko ZTB-KIT include the astragal, or do I need to buy that separately?
You need the astragal separately. The ZTB-KIT supplies only the thru-bolts and screws. For the astragal itself, ZenSupply carries options like the NGP 139SP steel fire-rated astragal with 3/4 inch overlap, the NGP 139A solid anodized aluminum astragal, the NGP 109N overlapping astragal with neoprene seal in 84 inch length, and the Cal-Royal EAST-501 aluminum T-astragal with vinyl insert for double doors.
2) Is the Pemko ZTB-KIT thru-bolt pack an astragal, or do I still need to buy the astragal itself?
The Pemko ZTB-KIT is mounting hardware only - a pack of 1/4-20 x 1-5/8 inch zinc thru-bolts with #6 x 1 inch F.H.S.M. screws for fastening an astragal to the door. The astragal bar is a separate purchase. If you need the bar, the NGP 139A is a solid metal astragal in anodized aluminum, the NGP 176A 84 is an overlapping astragal in anodized aluminum at 84 inches, and the Cal-Royal EAST-501 is an aluminum T-astragal with a vinyl insert for double doors.
3) My opening is a fire-rated pair - does the Pemko ZTB-KIT cover that, or is there a different astragal to spec?
The Pemko ZTB-KIT is the zinc thru-bolt and screw hardware used to fasten an astragal, so the fire rating decision rests on the astragal bar you choose. The NGP 139SP is a steel fire-rated door astragal with 3/4 inch overlap coverage, which is the piece spec'd for a rated pair. The ZTB-KIT fasteners address attachment, not the rating.
4) Will 1-5/8 inch thru-bolts work on a 1-3/4 inch commercial door?
The bolts are 1/4-20 x 1-5/8 inch, so they are sized to pass through the astragal and the door leaf with the astragal bearing the remaining stack. Standard commercial doors are 1-3/4 inches thick, and on that thickness the bolt is used with the astragal and backing hardware rather than bottoming out in the leaf. If your astragal is a thicker or stacked assembly, verify your total stack against the 1-5/8 inch bolt length before ordering.
5) Why thru-bolt an astragal instead of just using screws?
Thru-bolting puts the fastener all the way through the door leaf rather than relying on the screw thread holding in sheet metal or a hollow core. On a pair of doors that sees heavy traffic, or where an exit device shares the leaf, screws alone work loose. The ZTB-KIT covers both cases, since it ships 1/4-20 thru-bolts for the primary fastening plus #6 x 1 inch flat-head sheet metal screws for the points that do not get bolted.
6) Will the ZTB-KIT hole pattern line up with my existing astragal holes?
The holes in the pattern are countersunk and equally spaced, laid out for 6'8", 7'0", and 8'0" door heights. If your existing astragal was drilled to a different or non-uniform spacing, plan on drilling to match the pack rather than assuming a direct line-up.
7) Can I use this hardware pack on a lock astragal at the strike side?
A lock astragal is a different part with a different job. The ZTB-KIT is a fastener pack for full-height astragals on pairs of doors. For a short strike-side lock astragal, look at the Trimco 5001 stainless steel lock astragal for use with mortise or cylindrical locks, or the Trimco 5002 at 1-9/16 x 6 inches for cylindrical locks.
8) What is the difference between the Pemko ZTB-KIT and a Trimco 5001 or 5002 lock astragal?
They do different jobs. The Pemko ZTB-KIT is a pack of 1/4-20 x 1-5/8 inch zinc thru-bolts plus #6 x 1 inch screws for mounting an astragal bar to a door. The Trimco 5001 is a stainless steel lock astragal for use with mortise or cylindrical locks, and the Trimco 5002 is a stainless steel lock astragal measuring 1-9/16 by 6 inches for use with cylindrical locks - both are short pieces that clear the lock at the meeting stile rather than fasteners.
9) Which astragal do I pair with the ZTB-KIT thru-bolts if I want steel rather than aluminum?
The Pemko ZTB-KIT bolts are used with a 1/8 inch by 2 inch galvannealed steel astragal. If you are choosing the bar in steel, the NGP 139SP is a steel astragal with 3/4 inch overlap coverage. The aluminum alternatives are the NGP 139A solid metal astragal in anodized aluminum and the NGP 176A 84 overlapping astragal in anodized aluminum.
10) Is this kit corrosion resistant enough for an exterior pair of doors?
The pack is built for that. The bolts are zinc and the astragal material referenced is 1/8 x 2 inch galvannealed steel, both chosen for corrosion resistance on exterior and high-exposure openings. Pemko lists the substrate as zinc alloy.
11) Do I order the 9 pack or the 11 pack of the Pemko ZTB-KIT for an 8 foot door?
The Pemko ZTB-KIT comes in a 9 pack and an 11 pack, with countersunk holes equally spaced for 6'8", 7'0", and 8'0" doors. Taller leaves take more fastening points, so the 11 pack suits the 8'0" height while the 9 pack covers the shorter heights. Neither pack includes the astragal bar itself - that is a separate item such as the NGP 176A 84 overlapping aluminum astragal.
How fast can I get the Pemko ZTB-KIT-9 delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the continental U.S. Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit, reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the Pemko ZTB-KIT-9 come with a warranty?
Absolutely. The Pemko ZTB-KIT-9 is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the Pemko ZTB-KIT-9?
You can call, text, or email our expert support team for fast answers. We’re here to help with product selection, installation tips, and troubleshooting. Contact Us
Why buy the Pemko ZTB-KIT-9 from ZenSupply?
ZenSupply makes it easy to get the commercial door hardware you need—fast shipping, expert support, and rewards on every order. Our team is always ready to help you choose the right product for your project.
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