The Cutter,countersink, cataloged under National Stock Number 5133-01-016-5653, is classified within Federal Supply Class 5133 (Drill Bits, Counterbores, and Countersinks: Hand and Machine) of the Hand Tools group. The manufacturer of record is Bruce Aerospace Inc. Government technical data includes 12 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5133-01-016-5653 |
| Primary Part Number | MM305-9 1-1/4IN. |
| Item Name | Cutter,countersink |
| FSC / FSG | 5133 / 51 — Drill Bits, Counterbores, and Countersinks: Hand and Machine |
| Manufacturer | Bruce Aerospace Inc |
| Status | ACTIVE |
| Body Diameter | 1.250 INCHES NOMINAL IN |
| Point Diameter | 0.438 INCHES NOMINAL IN |
| Cutting End Style | STRAIGHT FLUTE BLUNT END |
| Nominal Thread Diameter | 0.375 INCHES IN |
| Features Provided | INTEGRAL PILOT |
| Pilot Diameter | 0.438 INCHES NOMINAL IN |
| Shank Style | EXTERNALLY THREADED |
| Flute Quantity | 2 |
| Included Angle | 100.0 DEGREES NOMINAL |
| Material | STEEL OVERALL |
| Thread Series Designator | UNF |
| Thread Quantity | 24 PER INCH |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| MM305-9 1-1/4IN. PRIMARY | Bruce Aerospace Inc (USA) |
| Reference | Meaning |
|---|---|
| MM-305-9 | 5/9 Secondary reference Martin Aircraft Tool Company |
NSN 5133-01-016-5653 is a Cutter,countersink, manufactured by Bruce Aerospace Inc, classified under FSC 5133, Drill Bits, Counterbores, and Countersinks: Hand and Machine. Status: active.
NSN 5133-01-016-5653 has 1 manufacturer part number on file: MM305-9 1-1/4IN. (Bruce Aerospace Inc).
Key specifications for MM305-9 1-1/4IN.: Body Diameter: 1.250 INCHES NOMINAL IN; Point Diameter: 0.438 INCHES NOMINAL IN; Cutting End Style: STRAIGHT FLUTE BLUNT END; Overall Length: 1.875 INCHES NOMINAL IN. 12 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.