PDQ 93101 Series Automatic Flush Bolt For Hollow Metal Doors

The PDQ 93101 is an automatic flush bolt for the inactive leaf of a pair of hollow metal doors, the hardware that secures that second door top and bottom so the active door has something solid to latch against. What makes it automatic is the key feature: opening the active door automatically retracts both the top and bottom bolts on the inactive leaf, so no one has to manually flip a lever to free the second door. Close the doors and the bolts re-engage on their own. The 93101 is non-handed, UL 10C fire listed, and built for labeled hollow metal openings, with a fusible link that locks the inactive door down under fire conditions.

What an automatic flush bolt does

This is worth understanding, because flush bolts confuse people. On a pair of doors, the inactive leaf needs to be held firmly top and bottom so the active leaf can latch into it and the pair stays closed. A flush bolt is the rod-and-bolt mechanism mortised into the edge of that inactive leaf that shoots a bolt into the head frame and the floor. The difference between types is how they operate: a manual flush bolt has to be thrown and released by hand, while an automatic flush bolt like the 93101 retracts itself the moment the active door opens, and re-engages when it closes. That means staff can use the pair normally without ever touching the inactive leaf hardware, which is why automatic flush bolts are specified on doors that get opened to full width regularly.

The 93101 retracts both the top and bottom bolts automatically, has an easy closing force so the doors operate smoothly, and includes an override feature that prevents damage to the doors or bolts if a bolt head is blocked from entering its strike.

Fire rating and the fusible link

This is a fire-door component, and the fire features matter. The 93101 is UL/cUL 10C listed for labeled hollow metal swing doors up to 4' x 8' at 3-1/2 hours, and it complies with ANSI/BHMA A156.3 Type 25. It includes a fusible link that automatically locks the inactive door under the high heat of a fire, so even though the bolts normally retract with the active door, the inactive leaf stays positively secured when it matters most for compartmentalizing a fire. That automatic fire-lockdown is exactly why code requires coordinated, fire-rated hardware on rated pairs.

Built for hollow metal, adjustable, with a dust-proof strike option

The 93101 is made for hollow metal door construction, with brass and steel components and the mounting screws included (16 #8 x 3/4" combo screws and 4 #8-32 machine screws). The rods are adjustable up to 1-1/2", so you can fine-tune the bolt engagement to your frame and floor conditions. For the bottom bolt, PDQ recommends adding the 909 dust-proof strike (ordered separately), a floor strike with a spring-loaded cover that keeps dirt and debris from clogging the strike, a common failure point on bottom bolts. The 93101 also meets the Buy American Act, which matters for government and institutional specs.

PDQ 93101 specifications

• Type: Automatic flush bolt (top and bottom), for the inactive leaf of a pair. ANSI/BHMA A156.3 Type 25.

• Application: Hollow metal doors. Non-handed.

• Operation: Fully automatic, opening the active door retracts top and bottom bolts; re-engages on closing. Easy closing force.

• Override: Prevents damage to doors or bolts if a bolt head is blocked from its strike.

• Fire: Fusible link automatically locks the inactive door under fire heat. UL/cUL 10C listed, labeled hollow metal swing doors 4' x 8', 3-1/2 hours.

• Rods: Adjustable up to 1-1/2".

• Material: Brass and steel.

• Fasteners: 16 #8 x 3/4" FH combo screws, 4 #8-32 x 3/8" FH machine screws (included).

• Finishes: 605 bright brass, 613 oil rubbed bronze, 626 satin chrome.

• Recommended accessory: PDQ 909 dust-proof strike (ordered separately).

• Compliance: Buy American Act.

Why choose the PDQ 93101

PDQ builds dependable commercial hardware at a value, and the 93101 is a UL-listed, code-compliant automatic flush bolt for hollow metal pairs. You get fully automatic top-and-bottom operation, an override that protects the hardware, a fusible link for fire lockdown, adjustable rods for a clean fit, and Buy American compliance for government work, all in a non-handed unit that simplifies ordering. For a pair of labeled hollow metal doors that need the inactive leaf secured without manual operation, it's a solid, economical choice.

One thing to confirm before ordering: the 93101 is for hollow metal doors (wood doors use a different flush bolt, like the Ives FB41 series), and on a fire-rated pair you'll also need a coordinator to ensure the inactive leaf closes first. Consider adding the PDQ 909 dust-proof strike for the bottom bolt to prevent clogging.

Order the PDQ 93101 from American Locksets

We stock PDQ flush bolts and accessories from authorized distribution, so every bolt ships with the manufacturer warranty. Compare options in the automatic flush bolts category, see the full PDQ flush bolts and coordinators range, or browse all flush bolts and coordinators.