The Counterbore,hand, cataloged under National Stock Number 5133-00-243-3606, 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 Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier. Government technical data includes 9 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5133-00-243-3606 |
| Primary Part Number | 226121-3-4-6 |
| Item Name | Counterbore,hand |
| FSC / FSG | 5133 / 51 — Drill Bits, Counterbores, and Countersinks: Hand and Machine |
| Manufacturer | Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier |
| Status | ACTIVE |
| Shank Diameter | 0.400 INCHES NOMINAL0.400 INCHES NOMINAL IN |
| Cutting End Style | SOLIDSOLID |
| Hardness Rating | 40.0 ROCKWELL C MINIMUM AND 40.0 ROCKWELL C MINIMUM AND 53.0 ROCKWELL C MAXIMUM53.0 ROCKWELL C MAXIMUM |
| Nominal Cutting Diameter | 0.4320 INCHES0.4320 INCHES IN |
| Features Provided | HANDLE AND HANDLE AND INTEGRAL PILOTINTEGRAL PILOT |
| Pilot Diameter | 0.184 INCHES MINIMUM AND 0.184 INCHES MINIMUM AND 0.187 INCHES MAXIMUM0.187 INCHES MAXIMUM IN |
| Shank Style | STRAIGHT ROUNDSTRAIGHT ROUND |
| Pilot Hole Nominal Diameter | 0.125 INCHES0.125 INCHES IN |
| 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 |
|---|---|
| 226121-3-4-6 PRIMARY | Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier (USA) |
| WA2077 | Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier (USA) |
NSN 5133-00-243-3606 is a Counterbore,hand, manufactured by Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier, classified under FSC 5133, Drill Bits, Counterbores, and Countersinks: Hand and Machine. Status: active.
NSN 5133-00-243-3606 has 2 manufacturer part numbers on file: 226121-3-4-6 (Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier), WA2077 (Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier).
Key specifications for 226121-3-4-6: Shank Diameter: 0.400 INCHES NOMINAL0.400 INCHES NOMINAL IN; Cutting End Style: SOLIDSOLID; Hardness Rating: 40.0 ROCKWELL C MINIMUM AND 40.0 ROCKWELL C MINIMUM AND 53.0 ROCKWELL C MAXIMUM53.0 ROCKWELL C MAXIMUM; Overall Length: 3.563 INCHES NOMINAL3.563 INCHES NOMINAL IN. 9 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.