The Counter Chronograph, cataloged under National Stock Number 6645-01-017-7435, is classified within Federal Supply Class 6645 (Time Measuring Instruments) of the Instruments and Laboratory Equipment group. The manufacturer of record is Avtron Aerospace 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 | 6645-01-017-7435 |
| Primary Part Number | K233 |
| Item Name | Counter Chronograph |
| FSC / FSG | 6645 / 66 — Time Measuring Instruments |
| Manufacturer | Avtron Aerospace Inc |
| Status | ACTIVE |
| General Characteristics Item Description | PROVIDES DATA ON VELOCITY OF A PROJECTILE FIRED FROM A PISTOL OR OTHER TYPE OF FIRE ARMS. 15.000 IN W,4.850 IN H,10.000 IN DIA 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 |
|---|---|
| K233 PRIMARY | Avtron Aerospace Inc (USA) |
NSN 6645-01-017-7435 is a Counter Chronograph, manufactured by Avtron Aerospace Inc, classified under FSC 6645, Time Measuring Instruments. Status: active.
NSN 6645-01-017-7435 has 1 manufacturer part number on file: K233 (Avtron Aerospace Inc).
1 possible match (shared part number, not a government interchangeability claim): 5360-01-298-8529. Verify interchangeability with system specifications before substitution.
Key specifications for K233: General Characteristics Item Description: PROVIDES DATA ON VELOCITY OF A PROJECTILE FIRED FROM A PISTOL OR OTHER TYPE OF FIRE ARMS. 15.000 IN W,4.850 IN H,10.000 IN DIA 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.