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Threaded Shank Drills (1/4-28 Adapter Drills)

Widely used in the aircraft industry, Threaded Shank (1/4-28 Adapter Drills) facilitate access to space-restricted areas unsuited for standard chuck-type drills. They can be used with a host of angle-drills and offset drills, and are available in high speed steel (HSS), cobalt (CO), and carbide (CB). To aid in identification, HSS drills are made with hexagonal adapters, while cobalt drills are made with square adapters.

Omega Technologies stocks NAS965 spec drills, and will fabricate special lengths to order. We also make threaded core drills. double margin drills, stove-burner drills and gun drills - all available with pilots and in Metric sizes. High speed steel and cobalt drills feature 135° split points.


Cobalt And High Speed Steel, Very Stubby Length Threaded Shank Adapter Drills, NAS965-D
Cobalt And High Speed Steel, Very Stubby Length Threaded Shank Adapter Drills, NAS965-D
High Speed Steel, Stub Length Threaded Shank Adapter Drills, NAS965-B
High Speed Steel, Stub Length Threaded Shank Adapter Drills facilitate access to space-restricted areas unsuited for standard chuck-type drills. High speed steel feature 135 degree split points.
High Speed Steel, Short Length Threaded Shank Adapter Drills, NAS965-B
High Speed Steel, Short Length Threaded Shank Adapter Drills facilitate access to space-restricted areas unsuited for standard chuck-type drills. High speed steel feature 135 degree split points.
High Speed Steel, Long Length Threaded Shank Adapter Drills, NAS965-B
High Speed Steel, Long Length Threaded Shank Adapter Drills facilitate access to space-restricted areas unsuited for standard chuck-type drills. High speed steel feature 135 degree split points.
Cobalt, Stub Length Threaded Shank Adapter Drills, NAS965-D
Cobalt, Stub Length Threaded Shank Adapter Drills facilitate access to space-restricted areas unsuited for standard chuck-type drills. High speed steel feature 135 degree split points.
Cobalt, Short Length Threaded Shank Adapter Drills, NAS965-D
Cobalt, Short Length Threaded Shank Adapter Drills facilitate access to space-restricted areas unsuited for standard chuck-type drills. High speed steel feature 135 degree split points.
Cobalt, Long Length Threaded Shank Adapter Drills, NAS965-D
Cobalt, Long Length Threaded Shank Adapter Drills facilitate access to space-restricted areas unsuited for standard chuck-type drills. High speed steel feature 135 degree split points.