The Countersink, cataloged under National Stock Number 5133-01-083-6596, is classified within Federal Supply Class 5133 (Drill Bits, Counterbores, and Countersinks: Hand and Machine) of the Hand Tools group. Government technical data includes 19 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5133-01-083-6596 |
| Item Name | Countersink |
| FSC / FSG | 5133 / 51 — Drill Bits, Counterbores, and Countersinks: Hand and Machine |
| Status | ACTIVE |
| Body Diameter | 0.407 INCHES MINIMUM AND 0.469 INCHES MAXIMUM IN |
| Point Diameter | 0.245 INCHES MINIMUM AND 0.255 INCHES MAXIMUM IN |
| Cutting End Style | STRAIGHT FLUTE BLUNT END |
| Hardness Rating | 62.0 ROCKWELL C MINIMUM AND 65.0 ROCKWELL C MAXIMUM |
| Thread Pitch Diameters | +0.2243 TO 0.2268 INCHES IN |
| Material Document and Classification | GGG-C-613 FED SPEC ALL MATERIAL RESPONSES OVERALL |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Cutting Rotation Direction | RIGHT-HAND |
| Features Provided | INTEGRAL PILOT |
| Thread Direction | LEFT-HAND |
| Departure From Cited Designator | AS MODIFIED BY PILOT DIAMETER |
| Pilot Diameter | 0.245 INCHES MINIMUM AND 0.255 INCHES MAXIMUM IN |
| Shank Style | EXTERNALLY THREADED |
| Flute Quantity | 2 |
| Included Angle | 99.0 DEGREES MINIMUM AND 101.0 DEGREES MAXIMUM |
| Thread Class | 3A A |
| Material | STEEL OVERALL |
| Thread Series Designator | UNF |
| Thread Quantity | 28 PER INCH |
| 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 | 4/1 Identification reference U.S. Government activity |
| GGG-C-613 TYVI | 5/1 Secondary reference U.S. Government activity |
NSN 5133-01-083-6596 is a Countersink, classified under FSC 5133, Drill Bits, Counterbores, and Countersinks: Hand and Machine. Status: active.
Key specifications for 5133-01-083-6596: Body Diameter: 0.407 INCHES MINIMUM AND 0.469 INCHES MAXIMUM IN; Point Diameter: 0.245 INCHES MINIMUM AND 0.255 INCHES MAXIMUM IN; Cutting End Style: STRAIGHT FLUTE BLUNT END; Hardness Rating: 62.0 ROCKWELL C MINIMUM AND 65.0 ROCKWELL C MAXIMUM. 19 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.