Thread Files | McMaster-Carr

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3/4"-10 (1 1/16" Wd.)

3/4"-16 (1 1/16" Wd.)

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For 0.75 to 3 mm thread pitches

For 0.8 to 3 mm thread pitches

For 9 to 32 threads per inch

For 11 to 24 threads per inch

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20 Products

Fastener Thread-Repairing Files

Repair rusted and damaged fastener threads. One file restores a range of thread sizes.

For External Threads

Thread File Handles—Thread file handles slip over the file to provide a comfortable grip.

Thread-Repairing Files								Thread File Handles
For Threads per In.	For Thread Pitch, mm	Wd.	Thk.	Overall Lg.	Material		Each	Pkg. Qty.		Pkg.
—	0.8, 1, 1.25, 1.5, 1.75, 2, 2.5, 3	7/16"	7/16"	8 3/8"	Steel	0000000	000000	6	0000000	00000
9, 10, 12, 16, 20, 27, 28, 32	—	7/16"	7/16"	8 3/8"	Steel	0000000	00000	6	0000000	0000
11, 12, 13, 14, 16, 18, 20, 24	—	7/16"	7/16"	8 3/8"	Steel	0000000	00000	6	0000000	0000

For Internal and External Threads

For Threads per In.	For Thread Pitch, mm	Wd.	Thk.	Overall Lg.	Material	Each
—	0.75, 1, 1.25, 1.5, 1.75, 2, 2.5, 3	3/8"	3/8"	9 1/4"	Steel	000000
9, 10, 12, 16, 20, 27, 28, 32	—	3/8"	3/8"	9 1/4"	Steel	00000
11, 12, 13, 14, 16, 18, 20, 24	—	3/8"	3/8"	9 1/4"	Steel	00000

Thread-Repairing File Sets

Use these sets to repair fastener, pipe, and conduit threads.

For External Threads

No. of Pieces	For Threads per In.	For Thread Pitch, mm	Overall Lg.	Material	Includes	Container Type		Each
6	8, 9, 10, 11, 12, 13, 14, 16, 18, 20, 24, 27, 28, 32	0.8, 1, 1.25, 1.5, 1.75, 2, 2.5, 3	8 3/8"	Steel	Three Plastic Handles	Plastic Case	0000000	000000
9	8, 9, 10, 11, 11 1/2, 12, 13, 14, 16, 18, 20, 24, 27, 28, 32	0.8, 1, 1.25, 1.5, 1.75, 2, 2.5, 3	8 3/8"	Steel	Four Plastic Handles	Plastic Case	0000000	00000

For Internal and External Threads

No. of Pieces	For Threads per In.	For Thread Pitch, mm	Overall Lg.	Material	Container Type		Each
4	8, 9, 10, 11, 11 1/2, 12, 13, 14, 16, 18, 20, 24, 27, 28, 32	0.75, 1, 1.25, 1.5, 1.75, 2, 2.5, 3	9 1/4"	Steel	Plastic Pouch	0000000	0000000

Pipe and Conduit Thread-Repairing Files

Repair rusted and damaged threads in pipe and conduit. One file restores a range of thread sizes.

For Internal Threads

Thread File Handles—Thread file handles slip over the file to provide a comfortable grip.

Thread-Repairing Files							Thread File Handles
For Threads per In.	Wd.	Thk.	Overall Lg.	Material		Each	Pkg. Qty.		Pkg.
8, 10	7/16"	7/16"	10"	Steel	0000000	000000	6	0000000	00000
8, 11 1/2	7/16"	7/16"	10"	Steel	0000000	00000	6	0000000	0000
10, 14	7/16"	7/16"	10"	Steel	0000000	00000	6	0000000	0000

For External Threads

Thread File Handles—Thread file handles slip over the file to provide a comfortable grip.

Thread-Repairing Files							Thread File Handles
For Threads per In.	Wd.	Thk.	Overall Lg.	Material		Each	Pkg. Qty.		Pkg.
8, 10, 11 1/2, 14, 16, 18, 24, 27	7/16"	7/16"	8 3/8"	Steel	0000000	000000	6	0000000	00000
8, 10, 11 1/2, 14	7/8"	7/16"	8 3/8"	Steel	0000000	00000	—	———	0

For Internal and External Threads

For Threads per In.	Wd.	Thk.	Overall Lg.	Material		Each
8, 10, 11 1/2, 14, 16, 18, 24, 27	3/8"	3/8"	9 1/4"	Steel	0000000	000000

Thread-Repairing Die Nut Sets

The dies in these sets match the width of hex nuts that are the same thread size, so one tool can turn both. For tight spaces, use with a ratcheting wrench since it requires minimal clearance to turn. Repairing dies remove imperfections and rust so threads engage properly for a strong connection.

	Thread Size	Thread Type	No. of Files	Wd.	Container Type		Each
Uncoated Carbon Steel



	12	M6, M8, M10, M12, M14	Metric	1	11 mm, 14 mm, 18 mm, 19 mm, 21 mm	Plastic Case	0000000	000000


	14	1/4"-20, 1/4"-28, 5/16"-18, 5/16"-24, 3/8"-16, 3/8"-24, 7/16"-14, 7/16"-20, 1/2"-13, 1/2"-20, 9/16"-12, 9/16"-18, 5/8"-11, 5/8"-18	UNC, UNF	1	7/16", 1/2", 9/16", 11/16", 3/4", 7/8", 15/16"	Plastic Case	0000000	00000
	16	1/4"-20, 1/4"-28, 5/16"-18, 5/16"-24, 3/8"-16, 3/8"-24, 7/16"-14, 7/16"-20, 1/2"-13, 1/2"-20, 9/16"-12, 9/16"-18, 5/8"-11, 5/8"-18, 3/4"-10, 3/4"-16	UNC, UNF	2	7/16", 1/2", 9/16", 11/16", 3/4", 7/8", 15/16", 1 1/16"	Plastic Case	0000000	00000

Tap, Die, and Thread File Sets

Repair screw threads in a wide range of sizes. The dies are hex shaped for use with conventional wrenches. The taps have a square shank that's compatible with tap wrenches and tap holders for drill presses and drilling machines. With a plug chamfer, all taps have 3-5 chamfered threads and are suitable for thread repair in both through holes and closed-end holes.

	File Sizes Included	Container Type		Each
Carbon Steel







	Right-Hand Thread

	48	1/2"-13, 1/2"-20, 1/4”-20, 1/4”-28, 3/8"-16, 3/8"-24, 5/16"-24, 5/16”-18, 7/16"-14, 7/16"-20, 9/16"-18, 9/16”-12, M6 × 1.00 mm, M8 × 1.25 mm, M10 × 1.00 mm, M10 × 1.25 mm, M10 × 1.50 mm, M11 × 1.50 mm, M12 × 1.25 mm, M12 × 1.50 mm, M12 × 1.75 mm, M14 × 1.50 mm	1/2"-13, 1/2"-20, 1/4"-20, 1/4"-28, 3/8"-16, 3/8"-24, 5/16"-18, 5/16"-24, 5/8"-11, 5/8"-18, 7/16"-14, 7/16"-20, 9/16"-12, 9/16"-18, M6 × 1.00 mm, M8 × 1.25 mm, M10 × 1.00 mm, M10 × 1.25 mm, M10 × 1.50 mm, M11 × 1.50 mm, M12 × 1.25 mm, M12 × 1.50 mm, M12 × 1.75 mm, M14 × 1.50 mm	For 0.75 to 3 mm thread pitches, For 11 to 24 threads per inch	Plastic Case	00000000	0000000