Products for bench top machinists | LittleMachineShop.com

Thread Restoring File, 12-28 TPI

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$8.37 $13.95 In stock

Restores damaged or rusted external threads on bolts, threaded shafts, pipes and pipe fittings.
Use to restore damaged or rusted threads of bolts, threaded shafts, pipes, and pipe fittings. The crosscut design has a depth that is proportional to the thread pitch.
Suitable for pitches 12, 13, 14, 16, 18, 20, 24 & 28 threads per inch.

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Express Shipping · United States: $3.99

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United States · Return window (days after delivery): 30. Return method: By mail. Return postage: Seller pays.

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Customer Reviews (5.0 / 5 · 5 reviews)

Lily Z. ★★★★★

My neighbor's tractor had a bolt that was completely buggered from years of hard use, and this file made quick work of cleaning up the threads without removing too much metal. The 12-28 TPI range covered the medium-sized bolts I needed to fix, and it felt solid in my hand.

David ★★★★★

Rusty pipe threads on an old gate valve were beyond saving with a wire brush, but this file cut through the crud in a few passes and the threads engaged like new. The crosscut pattern really grabs hold without slipping, and the 12-28 TPI range covers most of what I work on around the house.

Elizabeth ★★★★★

I've used this file on a few bolts with chewed-up threads, and the 12-28 TPI range handled both fine and coarse threads without skipping. The cross-cut design bites into the metal evenly, so it doesn't just smooth over rust—it actually reshapes the thread. For the price, it's a solid tool to keep in