The Mounting Base,optical Tooling in, cataloged under National Stock Number 4920-01-045-4546, is classified within Federal Supply Class 4920 (Aircraft Maintenance and Repair Shop Specialized Equipment) of the Maintenance and Repair Shop Equipment group. The manufacturer of record is Brunson Instrument Company Dba Brunson Instrument Co. 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 | 4920-01-045-4546 |
| Primary Part Number | 2617-G1-MD89-1 |
| Item Name | Mounting Base,optical Tooling in |
| FSC / FSG | 4920 / 49 — Aircraft Maintenance and Repair Shop Specialized Equipment |
| Manufacturer | Brunson Instrument Company Dba Brunson Instrument Co |
| Status | ACTIVE |
| General Characteristics Item Description | LINE-OF-SIGHT HEIGHT ABOVE BASE 8.563 IN.; ACCOMODATES ALL 2.250 IN. TELESCOPES AND COLLIMATORS; C/O 1 FOUR LEVELING SCREW BASE W/BALL BEARING SPINDLE SUPPORTING BAR W/CHANNEL SECTION ENDED W/Y SHAPED SUPPORTS 9.500 IN. ON CENTERS INDIVIDUALLY ADJUSTABLE VERTICALLY; WT 14.750 LBS LBS |
| 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 |
|---|---|
| 2617-G1-MD89-1 PRIMARY | Brunson Instrument Company Dba Brunson Instrument Co (USA) |
NSN 4920-01-045-4546 is a Mounting Base,optical Tooling in, manufactured by Brunson Instrument Company Dba Brunson Instrument Co, classified under FSC 4920, Aircraft Maintenance and Repair Shop Specialized Equipment. Status: active.
NSN 4920-01-045-4546 has 1 manufacturer part number on file: 2617-G1-MD89-1 (Brunson Instrument Company Dba Brunson Instrument Co).
Key specifications for 2617-G1-MD89-1: General Characteristics Item Description: LINE-OF-SIGHT HEIGHT ABOVE BASE 8.563 IN.; ACCOMODATES ALL 2.250 IN. TELESCOPES AND COLLIMATORS; C/O 1 FOUR LEVELING SCREW BASE W/BALL BEARING SPINDLE SUPPORTING BAR W/CHANNEL SECTION ENDED W/Y SHAPED SUPPORTS 9.500 IN. ON CENTERS INDIVIDUALLY ADJUSTABLE VERTICALLY; WT 14.750 LBS LBS; End Item Identification: F-15,C-130,C-141 ACFT SUPPORT EQUIPMENT. 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.