Manufactured by Fullerton Tool

JIT 24 hour delivery on Keyseat Cutters ( USA Only)

Need to mill some narrow-width slots?

Check out our 4375 Keyseat Cutter – it was designed for small engine manufacturing and automotive companies where narrow-width slots are necessary.

Its available in a wide selection of standard sizes and special face widths are also available with our 24-hour just-in-time service.

Our 4375 Keyseat Cutter is stocked with ½” diameter steel shanks and is uncoated. Get started with our Keyseat Cutter today!

SPECIFICATIONS

Grade: General Purpose
Flutes: 8, 10, 12, 14, 16
Single/Double End: Single End
Spiral Direction: Right Hand Spiral
Dimension Type: Imperial
Shank Tolerance: +.0000"/-.0005" | +0.000mm/-0.013mm
Cutting Tolerance: 3/8-3/4" DIA: +.010"-+0.015", 7/8-1-1/2" DIA: +.012"-+.017"

Cutting Diameter	Face Width	Neck Diameter	Shank Diameter	Overall Length	Number of Flutes	EDP Number
Cutting Diameter	Face Width	Neck Diameter	Shank Diameter	Overall Length	Number of Flutes	UC
0.3750	0.0312	0.2030	0.5000	2.0312	8	FUL.43900
0.3750	0.0469	0.2030	0.5000	2.0469	8	FUL.43901
0.3750	0.0625	0.2030	0.5000	2.0625	8	FUL.43302
0.3750	0.0938	0.2030	0.5000	2.0938	8	FUL.43303
0.3750	0.1250	0.2030	0.5000	2.1250	8	FUL.43403
0.5000	0.0312	0.2500	0.5000	2.0312	10	FUL.43902
0.5000	0.0469	0.2500	0.5000	2.0469	10	FUL.43903
0.5000	0.0625	0.2500	0.5000	2.0625	10	FUL.43240
0.5000	0.0781	0.2500	0.5000	2.0781	10	FUL.43904
0.5000	0.0938	0.2500	0.5000	2.0938	10	FUL.43304
0.5000	0.1094	0.2500	0.5000	2.1093	10	FUL.43905
0.5000	0.1250	0.2500	0.5000	2.1250	10	FUL.43404
0.6250	0.0312	0.2810	0.5000	2.0312	10	FUL.43906
0.6250	0.0469	0.2810	0.5000	2.0469	10	FUL.43907
0.6250	0.0625	0.2810	0.5000	2.0625	10	FUL.43908
0.6250	0.0781	0.2810	0.5000	2.0781	10	FUL.43909
0.6250	0.0938	0.2810	0.5000	2.0938	10	FUL.43305
0.6250	0.1094	0.2810	0.5000	2.1093	10	FUL.43910
0.6250	0.1250	0.2810	0.5000	2.1250	10	FUL.43405
0.6250	0.1406	0.2810	0.5000	2.1406	10	FUL.43911
0.6250	0.1562	0.2810	0.5000	2.1562	10	FUL.43505
0.6250	0.1875	0.2810	0.5000	2.1875	10	FUL.43605
0.7500	0.0312	0.2810	0.5000	2.0312	10	FUL.43912
0.7500	0.0469	0.2810	0.5000	2.0469	10	FUL.43913
0.7500	0.0625	0.2810	0.5000	2.0625	10	FUL.43914
0.7500	0.0781	0.2810	0.5000	2.0781	10	FUL.43915
0.7500	0.0938	0.2810	0.5000	2.0938	10	FUL.43916
0.7500	0.1094	0.2810	0.5000	2.1093	10	FUL.43917
0.7500	0.1250	0.2810	0.5000	2.1250	10	FUL.43406
0.7500	0.1406	0.2810	0.5000	2.1406	10	FUL.43918
0.7500	0.1562	0.2810	0.5000	2.1562	10	FUL.43506
0.7500	0.1875	0.2810	0.5000	2.1875	10	FUL.43606
0.7500	0.2031	0.2810	0.5000	2.2031	10	FUL.43919
0.7500	0.2188	0.2810	0.5000	2.2188	10	FUL.43920
0.7500	0.2344	0.2810	0.5000	2.2343	10	FUL.43921
0.7500	0.2500	0.2810	0.5000	2.2500	10	FUL.43806
0.8750	0.0625	0.2810	0.5000	2.0625	12	FUL.43922
0.8750	0.1250	0.2810	0.5000	2.1250	12	FUL.43923
0.8750	0.1562	0.2810	0.5000	2.1562	12	FUL.43507
0.8750	0.1875	0.2810	0.5000	2.1875	12	FUL.43607
0.8750	0.2188	0.2810	0.5000	2.2188	12	FUL.43707
0.8750	0.2500	0.2810	0.5000	2.2500	12	FUL.43807
1.0000	0.0312	0.2810	0.5000	2.0312	12	FUL.43924
1.0000	0.0469	0.2810	0.5000	2.0469	12	FUL.43925
1.0000	0.0625	0.2810	0.5000	2.0625	12	FUL.43926
1.0000	0.0781	0.2810	0.5000	2.0781	12	FUL.43927
1.0000	0.0938	0.2810	0.5000	2.0938	12	FUL.43928
1.0000	0.1250	0.2810	0.5000	2.1250	12	FUL.43929
1.0000	0.1562	0.2810	0.5000	2.1562	12	FUL.43930
1.0000	0.1875	0.2810	0.5000	2.1875	12	FUL.43608
1.0000	0.2188	0.2810	0.5000	2.2188	12	FUL.43708
1.0000	0.2500	0.2810	0.5000	2.2500	12	FUL.43808
1.1250	0.1250	0.2810	0.5000	2.1250	14	FUL.43931
1.1250	0.1875	0.2810	0.5000	2.1875	14	FUL.43609
1.1250	0.2188	0.2810	0.5000	2.2188	14	FUL.43709
1.1250	0.2500	0.2810	0.5000	2.2500	14	FUL.43809
1.2500	0.0312	0.2810	0.5000	2.0312	14	FUL.43932
1.2500	0.0625	0.2810	0.5000	2.0625	14	FUL.43933
1.2500	0.0938	0.2810	0.5000	2.0938	14	FUL.43934
1.2500	0.1250	0.2810	0.5000	2.1250	14	FUL.43935
1.2500	0.1562	0.2810	0.5000	2.1562	14	FUL.43936
1.2500	0.1875	0.2810	0.5000	2.1875	14	FUL.43610
1.2500	0.2188	0.2810	0.5000	2.2188	14	FUL.43710
1.2500	0.2500	0.2810	0.5000	2.2500	14	FUL.43810
1.5000	0.0312	0.3750	0.5000	2.0312	16	FUL.43937
1.5000	0.0625	0.3750	0.5000	2.0625	16	FUL.43938
1.5000	0.0938	0.3750	0.5000	2.0938	16	FUL.43939
1.5000	0.1250	0.3750	0.5000	2.1250	16	FUL.43940
1.5000	0.1875	0.3750	0.5000	2.1875	16	FUL.43941
1.5000	0.2500	0.3750	0.5000	2.2500	16	FUL.43812
1.5000	0.3125	0.3750	0.5000	2.3125	16	FUL.43000
1.5000	0.3750	0.3750	0.5000	2.3750	16	FUL.43212

Trademarks are the properties of their respective owner(s).

JIT 24 hour delivery on Keyseat Cutters ( USA Only)

SPECIFICATIONS

March 2026