The Countersink, cataloged under National Stock Number 5133-00-596-1042, 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 Zephyr Manufacturing Co., Inc. Dba Zephyr Manufacturing Co Inc. 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5133-00-596-1042 |
| Primary Part Number | ZT75-68 |
| Item Name | Countersink |
| FSC / FSG | 5133 / 51 — Drill Bits, Counterbores, and Countersinks: Hand and Machine |
| Manufacturer | Zephyr Manufacturing Co., Inc. Dba Zephyr Manufacturing Co Inc |
| Status | ACTIVE |
| Body Diameter | 0.500 INCHES NOMINAL IN |
| Point Diameter | 0.251 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 | 3 |
| Included Angle | 100.0 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 |
|---|---|
| ZT75-68 PRIMARY | Zephyr Manufacturing Co., Inc. Dba Zephyr Manufacturing Co Inc (USA) |
| Reference | Meaning |
|---|---|
| GGG-C-613 | 5/9 Secondary reference U.S. Government activity |
| GGG-C-613 TY1CLBSZ5NR11 | 5/9 Secondary reference U.S. Government activity |
NSN 5133-00-596-1042 is a Countersink, manufactured by Zephyr Manufacturing Co., Inc. Dba Zephyr Manufacturing Co Inc, classified under FSC 5133, Drill Bits, Counterbores, and Countersinks: Hand and Machine. Status: active.
NSN 5133-00-596-1042 has 1 manufacturer part number on file: ZT75-68 (Zephyr Manufacturing Co., Inc. Dba Zephyr Manufacturing Co Inc).
Key specifications for ZT75-68: Body Diameter: 0.500 INCHES NOMINAL IN; Point Diameter: 0.251 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.