The Bit,forstner, cataloged under National Stock Number 5133-00-222-8355, is classified within Federal Supply Class 5133 (Drill Bits, Counterbores, and Countersinks: Hand and Machine) of the Hand Tools group. Government technical data includes 8 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5133-00-222-8355 |
| Item Name | Bit,forstner |
| FSC / FSG | 5133 / 51 — Drill Bits, Counterbores, and Countersinks: Hand and Machine |
| Status | ACTIVE |
| Shank Small End Square Width | 0.250 INCHES NOMINAL IN |
| Cutting End Style | CIRCULAR RIM |
| Shank Large End Square Width | 0.438 INCHES NOMINAL IN |
| Hardness Rating | 40.0 ROCKWELL C MINIMUM AND 53.0 ROCKWELL C MAXIMUM |
| Nominal Cutting Diameter | 2.0000 INCHES IN |
| Nondefinitive Spec/std Data | F CLASS AND 1 TYPE |
| Shank Style | TAPER-SQUARE |
| 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 |
| Reference | Meaning |
|---|---|
| GGG-B-383 | 4/1 Identification reference U.S. Government activity |
| GGG-B-383 TY1CLF | 5/1 Secondary reference U.S. Government activity |
NSN 5133-00-222-8355 is a Bit,forstner, classified under FSC 5133, Drill Bits, Counterbores, and Countersinks: Hand and Machine. Status: active.
Key specifications for 5133-00-222-8355: Shank Small End Square Width: 0.250 INCHES NOMINAL IN; Cutting End Style: CIRCULAR RIM; Shank Large End Square Width: 0.438 INCHES NOMINAL IN; Hardness Rating: 40.0 ROCKWELL C MINIMUM AND 53.0 ROCKWELL C MAXIMUM. 8 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.