The Drill,twist, cataloged under National Stock Number 5133-01-121-5001, 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 Wetmore Tool and Engineering Company Dba Wetmore Cutting Tools. Government technical data includes 15 specifications, cited from the U.S. Government catalog. The record lists 4 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5133-01-121-5001 |
| Primary Part Number | 311-1890 |
| Item Name | Drill,twist |
| FSC / FSG | 5133 / 51 — Drill Bits, Counterbores, and Countersinks: Hand and Machine |
| Manufacturer | Wetmore Tool and Engineering Company Dba Wetmore Cutting Tools |
| Status | ACTIVE |
| Cutting End Style | GENERAL PURPOSE |
| Supplementary Features | O/A LENGTH DOES NOT INCLUDE THE THREAD LENGTH PAST THE HEXAGON NUT, THREADS = 1/4 IN. (+1/16 IN.) IN |
| Flute Length | 1.125 INCHES NOMINAL IN |
| Nominal Cutting Diameter | 0.1890 INCHES IN |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Cutting Rotation Direction | RIGHT-HAND |
| Specification/standard Data | 80205-NAS965 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD |
| Nondefinitive Spec/std Data | B TYPE AND 12 SIZE |
| Shank Style | EXTERNALLY THREADED W/HEX NUT |
| Flute Quantity | 2 |
| Material | STEEL OVERALL |
| Point Angle | 135.0 DEGREES NOMINAL |
| Thread Series Designator | UNF |
| Point Type | SPLIT |
| 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 |
|---|---|
| 311-1890 | Wetmore Tool and Engineering Company Dba Wetmore Cutting Tools (USA) |
| 32861 | New York Twist Drill Inc (USA) |
| 2972 12 | New York Twist Drill Inc (USA) |
| TP54A-12 | U.s. Industrial Tool and Supply Company Dba Usit Co (USA) |
| Reference | Meaning |
|---|---|
| NAS965 | 3/1 Design control — primary reference U.S. Government activity |
| NAS965 TYBSZ12 | 5/1 Secondary reference U.S. Government activity |
NSN 5133-01-121-5001 is a Drill,twist, manufactured by Wetmore Tool and Engineering Company Dba Wetmore Cutting Tools, classified under FSC 5133, Drill Bits, Counterbores, and Countersinks: Hand and Machine. Status: active.
NSN 5133-01-121-5001 has 4 manufacturer part numbers on file: 311-1890 (Wetmore Tool and Engineering Company Dba Wetmore Cutting Tools), 32861 (New York Twist Drill Inc), 2972 12 (New York Twist Drill Inc), TP54A-12 (U.s. Industrial Tool and Supply Company Dba Usit Co).
2 possible matches (shared part number, not a government interchangeability claim): 5331-01-200-0463, 5133-01-520-5668. Verify interchangeability with system specifications before substitution.
Key specifications for 311-1890: Cutting End Style: GENERAL PURPOSE; Supplementary Features: O/A LENGTH DOES NOT INCLUDE THE THREAD LENGTH PAST THE HEXAGON NUT, THREADS = 1/4 IN. (+1/16 IN.) IN; Flute Length: 1.125 INCHES NOMINAL IN; Overall Length: 2.125 INCHES NOMINAL IN. 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.