The Countersink, cataloged under National Stock Number 5133-00-243-2327, 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 Blackwood J. Blackwood & Son Pty Ltd. Government technical data includes 9 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5133-00-243-2327 |
| Primary Part Number | 0040 7807 |
| Item Name | Countersink |
| FSC / FSG | 5133 / 51 — Drill Bits, Counterbores, and Countersinks: Hand and Machine |
| Manufacturer | Blackwood J. Blackwood & Son Pty Ltd |
| Status | ACTIVE |
| Shank Diameter | 0.375 INCHES NOMINAL IN |
| Body Diameter | 0.500 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 | 82.0 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 |
|---|---|
| 0040 7807 | Blackwood J. Blackwood & Son Pty Ltd (AUS) |
| Reference | Meaning |
|---|---|
| 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 |
| GGG-C-613 TY4CLASZ1/2DEGREES82.0 | 5/9 Secondary reference U.S. Government activity |
NSN 5133-00-243-2327 is a Countersink, manufactured by Blackwood J. Blackwood & Son Pty Ltd, classified under FSC 5133, Drill Bits, Counterbores, and Countersinks: Hand and Machine. Status: active.
NSN 5133-00-243-2327 has 1 manufacturer part number on file: 0040 7807 (Blackwood J. Blackwood & Son Pty Ltd).
Key specifications for 0040 7807: Shank Diameter: 0.375 INCHES NOMINAL IN; Body Diameter: 0.500 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.