The Countersink, cataloged under National Stock Number 5133-01-282-0636, 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 The Boeing Company Div Defense. Government technical data includes 15 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5133-01-282-0636 |
| Primary Part Number | TFIM25.0120-278 |
| Item Name | Countersink |
| FSC / FSG | 5133 / 51 — Drill Bits, Counterbores, and Countersinks: Hand and Machine |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Body Diameter | 0.625 INCHES NOMINAL IN |
| Point Diameter | 0.278 INCHES NOMINAL IN |
| Cutting End Style | STRAIGHT FLUTE BLUNT END |
| Hardness Rating | 49.0 ROCKWELL C MINIMUM AND 54.0 ROCKWELL C MAXIMUM |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Cutting Rotation Direction | RIGHT-HAND |
| Features Provided | INTEGRAL PILOT |
| Thread Direction | RIGHT-HAND |
| Pilot Diameter | 0.278 INCHES NOMINAL IN |
| Shank Style | EXTERNALLY THREADED |
| Flute Quantity | 1 |
| Included Angle | 90.0 DEGREES NOMINAL |
| 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 |
| Part Number | Manufacturer |
|---|---|
| TFIM25.0120-278 PRIMARY | The Boeing Company Div Defense (USA) |
NSN 5133-01-282-0636 is a Countersink, manufactured by The Boeing Company Div Defense, classified under FSC 5133, Drill Bits, Counterbores, and Countersinks: Hand and Machine. Status: active.
NSN 5133-01-282-0636 has 1 manufacturer part number on file: TFIM25.0120-278 (The Boeing Company Div Defense).
Key specifications for TFIM25.0120-278: Body Diameter: 0.625 INCHES NOMINAL IN; Point Diameter: 0.278 INCHES NOMINAL IN; Cutting End Style: STRAIGHT FLUTE BLUNT END; Hardness Rating: 49.0 ROCKWELL C MINIMUM AND 54.0 ROCKWELL C MAXIMUM. 15 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.