The Collimator Set,alignment, cataloged under National Stock Number 4931-01-487-7056, is classified within Federal Supply Class 4931 (Fire Control Maintenance and Repair Shop Specialized Equipment) of the Maintenance and Repair Shop Equipment group. The manufacturer of record is Northrop Grumman Corp Electronic Systems Defensive System Div. 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4931-01-487-7056 |
| Primary Part Number | 21633120-601A |
| Item Name | Collimator Set,alignment |
| FSC / FSG | 4931 / 49 — Fire Control Maintenance and Repair Shop Specialized Equipment |
| Manufacturer | Northrop Grumman Corp Electronic Systems Defensive System Div |
| Status | ACTIVE |
| Functional Description | CALIBRATES ASTROINERTIAL NAVIGATIONAL SYSTEM |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL Q — CCL Item — Commerce Control List |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 21633120-601A PRIMARY | Northrop Grumman Corp Electronic Systems Defensive System Div (USA) |
NSN 4931-01-487-7056 is a Collimator Set,alignment, manufactured by Northrop Grumman Corp Electronic Systems Defensive System Div, classified under FSC 4931, Fire Control Maintenance and Repair Shop Specialized Equipment. Status: active.
NSN 4931-01-487-7056 has 1 manufacturer part number on file: 21633120-601A (Northrop Grumman Corp Electronic Systems Defensive System Div).
Key specifications for 21633120-601A: Special Features: C/O INTEGRATING SPHERE, IMAGE VIEWER, LIGHT SOURCE, AUTOCOLLIMATOR, BASE ASSY, STAND, SHROUD, CONTROLLER, POWER SUPPLY, MATERIALS -ALUMINUM ALLOYS; Functional Description: CALIBRATES ASTROINERTIAL NAVIGATIONAL SYSTEM; Part Name Assigned by Controlling Agency: TRACKER CALIBRATION SIMULATOR; End Item Identification: ASTROINERTIAL NAVIGATIONAL SYSTEM. 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.
NSN 4931-01-487-7056 has DEMIL Code Q. Demilitarization may be required before disposal or transfer to non-military entities.
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.