The Countersink, cataloged under National Stock Number 5133-01-326-4530, is classified within Federal Supply Class 5133 (Drill Bits, Counterbores, and Countersinks: Hand and Machine) of the Hand Tools group. Government technical data includes 6 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5133-01-326-4530 |
| Item Name | Countersink |
| FSC / FSG | 5133 / 51 — Drill Bits, Counterbores, and Countersinks: Hand and Machine |
| Status | ACTIVE |
| Body Diameter | 2.059 INCHES MINIMUM AND 2.600 INCHES MAXIMUM IN |
| Point Diameter | 0.375 INCHES NOMINAL IN |
| Cutting End Style | STRAIGHT FLUTE BLUNT END |
| Hardness Rating | 64.0 ROCKWELL C MINIMUM AND 65.0 ROCKWELL C MAXIMUM |
| Included Angle | 40.0 DEGREES NOMINAL |
| Material | STEEL COMP M2 OR STEEL COMP M7 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 |
|---|---|
| 16A11881-1 | 3/2 Design control — primary reference U.S. Government activity |
| 16VA11881-1 | D/9 Drawing number reference only U.S. Government activity |
NSN 5133-01-326-4530 is a Countersink, classified under FSC 5133, Drill Bits, Counterbores, and Countersinks: Hand and Machine. Status: active.
Key specifications for 5133-01-326-4530: Body Diameter: 2.059 INCHES MINIMUM AND 2.600 INCHES MAXIMUM IN; Point Diameter: 0.375 INCHES NOMINAL IN; Cutting End Style: STRAIGHT FLUTE BLUNT END; Hardness Rating: 64.0 ROCKWELL C MINIMUM AND 65.0 ROCKWELL C MAXIMUM. 6 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.