The Countersink, cataloged under National Stock Number 5133-00-540-0125, is classified within Federal Supply Class 5133 (Drill Bits, Counterbores, and Countersinks: Hand and Machine) of the Hand Tools group. Government technical data includes 9 specifications, cited from the U.S. Government catalog. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5133-00-540-0125 |
| Item Name | Countersink |
| FSC / FSG | 5133 / 51 — Drill Bits, Counterbores, and Countersinks: Hand and Machine |
| Status | ACTIVE |
| Shank Diameter | 0.500 INCHES NOMINAL IN |
| Body Diameter | 0.625 INCHES NOMINAL IN |
| Cutting End Style | STRAIGHT FLUTE POINT END |
| Hardness Rating | 40.0 ROCKWELL C MINIMUM AND 53.0 ROCKWELL C MAXIMUM |
| Cutting Rotation Direction | RIGHT-HAND |
| Specification/standard Data | 05047-ASME B94.2 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD |
| Shank Style | STRAIGHT ROUND |
| Included Angle | 78.0 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 |
|---|---|
| GGG-C-613 TY4CLBSZ5/8 | 5/9 Secondary reference U.S. Government activity |
| GGG-C-613 | 5/9 Secondary reference U.S. Government activity |
| B94.2 | 3/1 Design control — primary reference The American Society of Mechanical Engineers |
NSN 5133-00-540-0125 is a Countersink, classified under FSC 5133, Drill Bits, Counterbores, and Countersinks: Hand and Machine. Status: active.
Key specifications for 5133-00-540-0125: Shank Diameter: 0.500 INCHES NOMINAL IN; Body Diameter: 0.625 INCHES NOMINAL IN; Cutting End Style: STRAIGHT FLUTE POINT END; Hardness Rating: 40.0 ROCKWELL C MINIMUM AND 53.0 ROCKWELL C MAXIMUM. 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.