The Counterbore,machine, cataloged under National Stock Number 5133-00-232-9250, 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 Kennametal Inc. Div Kennametal Industrial Products Group. Government technical data includes 9 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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 | 5133-00-232-9250 |
| Primary Part Number | 878 3/8 |
| Item Name | Counterbore,machine |
| FSC / FSG | 5133 / 51 — Drill Bits, Counterbores, and Countersinks: Hand and Machine |
| Manufacturer | Kennametal Inc. Div Kennametal Industrial Products Group |
| Status | ACTIVE |
| Cutting End Style | INTERCHANGEABLE PILOT |
| Taper Shank Size Designator | 1 MORSE |
| Nominal Cutting Diameter | 0.3750 INCHES IN |
| Features Provided | REPLACEABLE PILOT |
| Pilot Diameter | 0.188 INCHES MINIMUM AND 0.312 INCHES MAXIMUM IN |
| Shank Style | STANDARD TAPER W/TANG |
| Pilot Hole Nominal Diameter | 0.156 INCHES IN |
| Flute Quantity | 3 |
| 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 |
| Part Number | Manufacturer |
|---|---|
| 878 3/8 | Kennametal Inc. Div Kennametal Industrial Products Group (USA) |
| Reference | Meaning |
|---|---|
| C46477 | 3/9 Design control — primary reference Kennametal Inc. Div Kennametal Industrial Products Group |
| 878 3/8 | 5/9 Secondary reference Cleveland Twist Drill Co Div of Greenfield Industries Inc |
NSN 5133-00-232-9250 is a Counterbore,machine, manufactured by Kennametal Inc. Div Kennametal Industrial Products Group, classified under FSC 5133, Drill Bits, Counterbores, and Countersinks: Hand and Machine. Status: active.
NSN 5133-00-232-9250 has 1 manufacturer part number on file: 878 3/8 (Kennametal Inc. Div Kennametal Industrial Products Group).
2 possible matches (shared part number, not a government interchangeability claim): 5961-00-563-8009, 6625-01-605-5645. Verify interchangeability with system specifications before substitution.
Key specifications for 878 3/8: Cutting End Style: INTERCHANGEABLE PILOT; Taper Shank Size Designator: 1 MORSE; Overall Length: 4.062 INCHES NOMINAL IN; Nominal Cutting Diameter: 0.3750 INCHES IN. 9 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.