Drill Chart - Threaded Inserts for Wood - All Inserts

This comprehensive drill chart covers all E-Z LOK threaded inserts designed for wood applications. Whether you're working with hardwood or softwood, this reference guide includes specifications for Knife Thread inserts (available in brass and stainless steel for hardwood), Hex Drive inserts (flush and flanged configurations for softwood), and Finserts (press-in style). Find the correct drill size and drive tool for professional-grade installations in furniture making, cabinetry, woodworking, and general carpentry projects. Available in both Unified (inch) and Metric thread specifications.

Knife Thread - Brass - Inch

For Hardwood (E-Z Knife™)

Part Number	Internal Thread	Drill	Drive Tool
400-004	4-40	17/64	500-004
400-006	6-32	17/64	500-006
400-008	8-32	17/64	500-1
400-3	10-24	25/64	500-2
400-332	10-32	25/64	500-2
400-4	1/4-20	25/64	DT-4
400-428	1/4-28	25/64	DT-428
400-475	1/4-20	25/64	DT-4
400-5	5/16-18	33/64	DT-5
400-524	5/16-24	33/64	DT-524
400-510	5/16-18	33/64	DT-5
400-6	3/8-16	33/64	DT-6
400-610	3/8-16	33/64	DT-6
400-624	3/8-24	33/64	DT-624

Knife Thread - Brass - Metric

For Hardwood (E-Z Knife™)

Part Number	Internal Thread	Drill	Drive Tool
400-M3	M3-0.5	17/64	500-006
400-M4	M4-0.7	17/64	500-1
400-M5	M5-0.8	25/64	500-2
400-M6	M6-1.0	25/64	DT-M6
400-M8	M8-1.25	33/64	DT-M8
400-M10	M10-1.5	33/64	DT-M10

Knife Thread - Stainless Steel - Inch

For Hardwood (E-Z Knife™)

Part Number	Internal Thread	Drill	Drive Tool
400-004-CR	4-40	17/64	500-004
400-006-CR	6-32	17/64	500-006
400-008-CR	8-32	17/64	500-1
400-3-CR	10-24	25/64	500-2
400-332-CR	10-32	25/64	500-2
400-4-CR	1/4-20	25/64	DT-4
400-428-CR	1/4-28	25/64	DT-428
400-5-CR	5/16-18	33/64	DT-5
400-524-CR	5/16-24	33/64	DT-524
400-6-CR	3/8-16	33/64	DT-6
400-624-CR	3/8-24	33/64	DT-624

Knife Thread - Stainless Steel - Metric

For Hardwood (E-Z Knife™)

Part Number	Internal Thread	Drill	Drive Tool
400-M3-CR	M3-0.5	17/64	500-006
400-M4-CR	M4-0.7	17/64	500-1
400-M5-CR	M5-0.8	25/64	500-2
400-M6-CR	M6-1.0	25/64	DT-M6
400-M8-CR	M8-1.25	33/64	DT-M8
400-M10-CR	M10-1.5	33/64	DT-M10

Hex Drive - Flush - Inch

For Softwood (E-Z Hex™)

Part Number	Internal Thread	Drill	Drive Tool
800832-10	8-32	15/64	8500
801024-10	10-24	9/32	8600
801024-13	10-24	9/32	8600
801032-10	10-32	9/32	8600
801032-13	10-32	9/32	8600
801420-10	1/4-20	23/64	9000
801420-13	1/4-20	23/64	9000
801420-20	1/4-20	7/16	9000
851618-13	5/16-18	7/16	9100
851618-20	5/16-18	7/16	9100
851618-25	5/16-18	7/16	9100

Hex Drive - Flush - Metric

For Softwood (E-Z Hex™)

Part Number	Internal Thread	Drill	Drive Tool
800407-10	M4-0.7	15/64	8500
800610-13	M6-1.0	23/64	9000
800610-20	M6-1.0	23/64	9000
808125-13	M8-1.25	7/16	9100
808125-20	M8-1.25	7/16	9100

Hex Drive - Flanged - Inch

For Softwood (E-Z Hex™)

Part Number	Internal Thread	Drill	Drive Tool
900832-10	8-32	15/64	8500
901024-10	10-24	9/32	8600
901024-13	10-24	9/32	8600
901024-20	10-24	9/32	8600
901032-10	10-32	9/32	8600
901032-13	10-32	9/32	8600
901032-20	10-32	9/32	8600
901420-10	1/4-20	23/64	9000
901420-13	1/4-20	23/64	9000
901420-20	1/4-20	23/64	9000
901420-25	1/4-20	23/64	9000
903816-13	3/8-16	15/32	9200
903816-20	3/8-16	15/32	9200
903816-25	3/8-16	15/32	9200
951618-13	5/16-18	7/16	9100
951618-20	5/16-18	7/16	9100
951618-25	5/16-18	7/16	9100

Hex Drive - Flanged - Metric

For Softwood (E-Z Hex™)

Part Number	Internal Thread	Drill	Drive Tool
900407-10	M4-0.7	15/64	8500
900610-13	M6-1.0	23/64	9000
900610-20	M6-1.0	23/64	9000
908125-13	M8-1.25	7/16	9100
908125-20	M8-1.25	7/16	9100
901050-13	M10-1.5	15/32	9200
901050-25	M10-1.5	15/32	9200

Finserts - Inch

Press-In Style

Part Number	Internal Thread	Drill	# of Fins
170-004-BR	4-40	#5	1
270-004-BR	4-40	#5	3
170-006-BR	6-32	#5	1
270-006-BR	6-32	#5	2
170-008-BR	8-32	15/64	1
270-008-BR	8-32	15/64	2
270-3-BR	10-24	G	2
170-332-BR	10-32	G	1
270-332-BR	10-32	G	2
370-332-BR	10-32	11/32	3
270-4-BR	1/4-20	21/64	2
370-4-BR	1/4-20	13/32	3
370-5-BR	5/16-18	13/32	3

Finserts - Metric

Press-In Style

Part Number	Internal Thread	Drill	# of Fins
270-M5-BR	M5-0.8	G	2
270-M6-BR	M6-1.0	21/64	2
370-M8-BR	M8-1.25	15/32	3