The Cutter Set,countersink, cataloged under National Stock Number 5133-01-491-9748, 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 Us Air Tool Co., Inc.. Government technical data includes 1 specification, 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. 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 | 5133-01-491-9748 |
| Primary Part Number | 53-441 |
| Item Name | Cutter Set,countersink |
| FSC / FSG | 5133 / 51 — Drill Bits, Counterbores, and Countersinks: Hand and Machine |
| Manufacturer | Us Air Tool Co., Inc. |
| Status | ACTIVE |
| General Characteristics Item Description | CONTAINS 1 EA COUNTERSINK CUTTERS WITH INTEGRAL PILOT SIZE 3/32, 1/8 AND 5/32 IN.; 100 DEG ANGLE; 1/2 IN. BODY DIAMETERS; INCLUDES STANDARD ADJUSTABLE MICRO-STOP IN |
| 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 |
|---|---|
| 53-441 PRIMARY | Us Air Tool Co., Inc. (USA) |
NSN 5133-01-491-9748 is a Cutter Set,countersink, manufactured by Us Air Tool Co., Inc., classified under FSC 5133, Drill Bits, Counterbores, and Countersinks: Hand and Machine. Status: active.
NSN 5133-01-491-9748 has 1 manufacturer part number on file: 53-441 (Us Air Tool Co., Inc.).
1 possible match (shared part number, not a government interchangeability claim): 5945-01-659-7937. Verify interchangeability with system specifications before substitution.
Key specifications for 53-441: General Characteristics Item Description: CONTAINS 1 EA COUNTERSINK CUTTERS WITH INTEGRAL PILOT SIZE 3/32, 1/8 AND 5/32 IN.; 100 DEG ANGLE; 1/2 IN. BODY DIAMETERS; INCLUDES STANDARD ADJUSTABLE MICRO-STOP IN. 1 specification is 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.