The Cutter,countersink, cataloged under National Stock Number 5133-00-294-4599, is classified within Federal Supply Class 5133 (Drill Bits, Counterbores, and Countersinks: Hand and Machine) of the Hand Tools group. Government technical data includes 13 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5133-00-294-4599 |
| Item Name | Cutter,countersink |
| FSC / FSG | 5133 / 51 — Drill Bits, Counterbores, and Countersinks: Hand and Machine |
| Status | ACTIVE |
| Body Diameter | 0.875 INCHES NOMINAL IN |
| Point Diameter | 0.312 INCHES NOMINAL IN |
| Cutting End Style | STRAIGHT FLUTE BLUNT END |
| Taper Shank Size Designator | 2 JARNO |
| Hardness Rating | 40.0 ROCKWELL C MINIMUM AND 53.0 ROCKWELL C MAXIMUM |
| Features Provided | INTEGRAL PILOT |
| Departure From Cited Designator | AS OD BY FLUTE QTY |
| Pilot Diameter | 0.312 INCHES NOMINAL IN |
| Nondefinitive Spec/std Data | 1 CLASS AND A STYLE AND N SIZE |
| Shank Style | STANDARD TAPER-ROUND |
| Flute Quantity | 3 |
| Included Angle | 82.0 DEGREES NOMINAL |
| Material | STEEL OVERALL |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| MIL-H-4081 | 4/1 Identification reference U.S. Government activity |
| 6028B | 5/1 Secondary reference Learjet Inc |
NSN 5133-00-294-4599 is a Cutter,countersink, classified under FSC 5133, Drill Bits, Counterbores, and Countersinks: Hand and Machine. Status: active.
2 possible matches (shared part number, not a government interchangeability claim): 5133-00-595-8219, 5360-00-967-4805. Verify interchangeability with system specifications before substitution.
Key specifications for 5133-00-294-4599: Body Diameter: 0.875 INCHES NOMINAL IN; Point Diameter: 0.312 INCHES NOMINAL IN; Cutting End Style: STRAIGHT FLUTE BLUNT END; Taper Shank Size Designator: 2 JARNO. 13 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.