The Drill,twist, cataloged under National Stock Number 5133-01-499-2595, 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 Precision Twist Drill Co. Government technical data includes 12 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5133-01-499-2595 |
| Primary Part Number | 53616 |
| Item Name | Drill,twist |
| FSC / FSG | 5133 / 51 — Drill Bits, Counterbores, and Countersinks: Hand and Machine |
| Manufacturer | Precision Twist Drill Co |
| Status | ACTIVE |
| Shank Diameter | 0.250 INCHES NOMINAL IN |
| Cutting End Style | GENERAL PURPOSE |
| Hardness Rating | 65.0 ROCKWELL C MINIMUM AND 67.0 ROCKWELL C MAXIMUM |
| Flute Length | 2.750 INCHES NOMINAL IN |
| Nominal Cutting Diameter | 0.2500 INCHES IN |
| Cutting Rotation Direction | RIGHT-HAND |
| Shank Style | STRAIGHT ROUND |
| Flute Quantity | 2 |
| Surface Treatment | COPPER AND OXIDE FILM OVERALL |
| Material | STEEL ALLOY OVERALL |
| Point Angle | 135.0 DEGREES NOMINAL |
| Point Type | SPLIT |
| 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 |
|---|---|
| CO500-6 1/4 | Precision Twist Drill Co (USA) |
| 53616 PRIMARY | Precision Twist Drill Co (USA) |
NSN 5133-01-499-2595 is a Drill,twist, manufactured by Precision Twist Drill Co, classified under FSC 5133, Drill Bits, Counterbores, and Countersinks: Hand and Machine. Status: active.
NSN 5133-01-499-2595 has 2 manufacturer part numbers on file: CO500-6 1/4 (Precision Twist Drill Co), 53616 (Precision Twist Drill Co).
1 possible match (shared part number, not a government interchangeability claim): 5995-01-502-9227. Verify interchangeability with system specifications before substitution.
Key specifications for 53616: Shank Diameter: 0.250 INCHES NOMINAL IN; Cutting End Style: GENERAL PURPOSE; Hardness Rating: 65.0 ROCKWELL C MINIMUM AND 67.0 ROCKWELL C MAXIMUM; Flute Length: 2.750 INCHES NOMINAL IN. 12 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.