The Countersink, cataloged under National Stock Number 5133-01-028-7668, 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 Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney. Government technical data includes 13 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 | 5133-01-028-7668 |
| Primary Part Number | PWA52911 |
| Item Name | Countersink |
| FSC / FSG | 5133 / 51 — Drill Bits, Counterbores, and Countersinks: Hand and Machine |
| Manufacturer | Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney |
| Status | ACTIVE |
| Shank Diameter | 0.500 INCHES NOMINAL IN |
| Body Diameter | 0.500 INCHES NOMINAL IN |
| Point Diameter | 0.125 INCHES NOMINAL IN |
| Cutting End Style | SPIRAL FLUTE BLUNT END |
| Hardness Rating | 66.68 ROCKWELL C NOMINAL |
| Cutting Rotation Direction | RIGHT-HAND |
| Features Provided | REPLACEABLE PILOT |
| Pilot Diameter | 0.164 INCHES NOMINAL IN |
| Shank Style | STRAIGHT ROUND |
| Pilot Hole Nominal Diameter | 0.094 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 |
|---|---|
| PWA52911 PRIMARY | Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney (USA) |
NSN 5133-01-028-7668 is a Countersink, manufactured by Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney, classified under FSC 5133, Drill Bits, Counterbores, and Countersinks: Hand and Machine. Status: active.
NSN 5133-01-028-7668 has 1 manufacturer part number on file: PWA52911 (Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney).
Key specifications for PWA52911: Shank Diameter: 0.500 INCHES NOMINAL IN; Body Diameter: 0.500 INCHES NOMINAL IN; Point Diameter: 0.125 INCHES NOMINAL IN; Cutting End Style: SPIRAL FLUTE BLUNT END. 13 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.