The Adapter Bushing, cataloged under National Stock Number 4730-00-362-8420, is classified within Federal Supply Class 4730 (Hose, Pipe, Tube, Lubrication, and Railing Fittings) of the Pipe, Tubing, Hose, and Fittings group. The manufacturer of record is Brinkley Technology Group Llc Dba Hercules Manufacturing. Government technical data includes 14 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 4 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-00-362-8420 |
| Primary Part Number | 1660A |
| Item Name | Adapter Bushing |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Brinkley Technology Group Llc Dba Hercules Manufacturing |
| Status | ACTIVE |
| Width Across Flats | 0.750 INCHES NOMINAL IN |
| Male End Thread Size | 5/8-24 |
| Female End Thread Length | 0.563 INCHES NOMINAL IN |
| Female End Thread Class | 2B |
| Male End Thread Direction | RIGHT-HAND |
| Female End Thread Size | 5/16-24 |
| Wrenching Facility Shape | HEXAGON |
| Male End Screw Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Female End Screw Thread Series Designator | UNF |
| Male End Thread Class | 3A A |
| Female End Thread Direction | RIGHT-HAND |
| Material | STEEL |
| Male End Thread Length | 0.219 INCHES NOMINAL IN |
| Thickness | 0.250 INCHES NOMINAL 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 |
|---|---|
| 5163209 | U S Army Tank Automotive Command Amsta-Im-Mm (USA) |
| 1660A PRIMARY | Brinkley Technology Group Llc Dba Hercules Manufacturing (USA) |
| A163209 | Mack Trucks Inc Parts Opn (USA) |
| Reference | Meaning |
|---|---|
| 1A9723 | 5/2 Secondary reference U.S. Government activity |
| 1660A | 5/9 Secondary reference Hercules Engine Co Inc |
| 643503 | 5/9 Secondary reference Sasco Inc Canadian Div |
| 55199 | 5/9 Secondary reference White Motor Corp |
NSN 4730-00-362-8420 is a Adapter Bushing, manufactured by Brinkley Technology Group Llc Dba Hercules Manufacturing, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-00-362-8420 has 3 manufacturer part numbers on file: 5163209 (U S Army Tank Automotive Command Amsta-Im-Mm), 1660A (Brinkley Technology Group Llc Dba Hercules Manufacturing), A163209 (Mack Trucks Inc Parts Opn).
4 possible matches (shared part number, not a government interchangeability claim): 5950-00-646-4037, 2530-01-147-6424, 2590-01-645-5369. Verify interchangeability with system specifications before substitution.
Key specifications for 1660A: Width Across Flats: 0.750 INCHES NOMINAL IN; Male End Thread Size: 5/8-24; Female End Thread Length: 0.563 INCHES NOMINAL IN; Female End Thread Class: 2B. 14 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.