The Cutter,counterbore, cataloged under National Stock Number 5133-01-138-4906, 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 Wright Machine & Tool Co., Inc.. Government technical data includes 7 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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 | 5133-01-138-4906 |
| Primary Part Number | C111 |
| Item Name | Cutter,counterbore |
| FSC / FSG | 5133 / 51 — Drill Bits, Counterbores, and Countersinks: Hand and Machine |
| Manufacturer | Wright Machine & Tool Co., Inc. |
| Status | ACTIVE |
| Cutting End Style | INTERCHANGEABLE PILOT |
| Holder Accommodated | CONTINENTAL STANDARD DRIVE 101 AND 102 |
| Nominal Cutting Diameter | 0.2500 INCHES IN |
| Features Provided | REPLACEABLE PILOT |
| Shank Style | PIN DRIVE |
| 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 |
|---|---|
| C111 PRIMARY | Wright Machine & Tool Co., Inc. (USA) |
| Reference | Meaning |
|---|---|
| C-111 | 5/9 Secondary reference Ex-Cell-O Corp Tool and Abrasive Products Div |
NSN 5133-01-138-4906 is a Cutter,counterbore, manufactured by Wright Machine & Tool Co., Inc., classified under FSC 5133, Drill Bits, Counterbores, and Countersinks: Hand and Machine. Status: active.
NSN 5133-01-138-4906 has 1 manufacturer part number on file: C111 (Wright Machine & Tool Co., Inc.).
2 possible matches (shared part number, not a government interchangeability claim): 4820-01-189-8530, 3510-01-330-8175. Verify interchangeability with system specifications before substitution.
Key specifications for C111: Cutting End Style: INTERCHANGEABLE PILOT; Holder Accommodated: CONTINENTAL STANDARD DRIVE 101 AND 102; Nominal Cutting Diameter: 0.2500 INCHES IN; Features Provided: REPLACEABLE PILOT. 7 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.