The Countersink, cataloged under National Stock Number 5133-00-430-3302, 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 Fmc Corp. Government technical data includes 11 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5133-00-430-3302 |
| Primary Part Number | A6 |
| Item Name | Countersink |
| FSC / FSG | 5133 / 51 — Drill Bits, Counterbores, and Countersinks: Hand and Machine |
| Manufacturer | Fmc Corp |
| Status | ACTIVE |
| Body Diameter | 0.516 INCHES NOMINAL IN |
| Point Diameter | 0.250 INCHES NOMINAL IN |
| Cutting End Style | STRAIGHT FLUTE W/THROUGH HOLE |
| Hardness Rating | 40.0 ROCKWELL C MINIMUM AND 53.0 ROCKWELL C MAXIMUM |
| Cutting Rotation Direction | RIGHT-HAND |
| Features Provided | REPLACEABLE PILOT |
| Pilot Diameter | 0.250 INCHES NOMINAL IN |
| Pilot Hole Nominal Diameter | 0.251 INCHES IN |
| Flute Quantity | 2 |
| Included Angle | 160.0 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 |
| Part Number | Manufacturer |
|---|---|
| A6 | Fmc Corp (USA) |
| Reference | Meaning |
|---|---|
| 9501680 | 3/9 Design control — primary reference Asset Systems, Inc. Dba Asset Systems Inc |
NSN 5133-00-430-3302 is a Countersink, manufactured by Fmc Corp, classified under FSC 5133, Drill Bits, Counterbores, and Countersinks: Hand and Machine. Status: active.
NSN 5133-00-430-3302 has 1 manufacturer part number on file: A6 (Fmc Corp).
Key specifications for A6: Body Diameter: 0.516 INCHES NOMINAL IN; Point Diameter: 0.250 INCHES NOMINAL IN; Cutting End Style: STRAIGHT FLUTE W/THROUGH HOLE; Hardness Rating: 40.0 ROCKWELL C MINIMUM AND 53.0 ROCKWELL C MAXIMUM. 11 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.