The Adapter,straight,tube to Boss, cataloged under National Stock Number 4730-01-323-2070, 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 Brennan Industries. Government technical data includes 15 specifications, cited from the U.S. Government catalog. The record lists 5 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4730-01-323-2070 |
| Primary Part Number | 6400-20-16-0-SS |
| Item Name | Adapter,straight,tube to Boss |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Brennan Industries |
| Status | ACTIVE |
| Furnished Items and Quantity | 1 TUBE COUPLING NUT W/SLEEVE AND 1 PREFORMED PACKING |
| Connection Style | EXTERNAL SEAT FOR GASKET SEAL (BOSS) SECOND END |
| Connection Style | FLARED (TUBE) FIRST END |
| Nominal Overall Length | 2.300 INCHES IN |
| Connection Type | THREADED EXTERNAL TUBE FIRST END |
| Connection Type | THREADED EXTERNAL BOSS SECOND END |
| Nominal Outside Diameter Tube Accommodated | 1.250 INCHES FIRST END IN |
| Nominal Thread Size | 1.625 INCHES FIRST END IN |
| Nominal Thread Size | 1.313 INCHES SECOND END IN |
| Seat Angle | 37.0 DEGREES FIRST END |
| Surface Treatment | PASSIVATE OVERALL |
| Thread Class | 3A ALL ENDS A |
| Thread Quantity Per Inch | 12 ALL ENDS |
| Material | STEEL COMP 304 OVERALL |
| Thread Series Designator | UN ALL ENDS |
| 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 |
|---|---|
| 516-5911058ITEM19 | Naval Sea Systems Command (USA) |
| 516-5911058-19 | Naval Sea Systems Command (USA) |
| 202702-16-20C | Danfoss Power Solutions II, Llc (USA) |
| AA67022-20-16JA | Allan Aircraft Supply Co., Llc Dba Allan Aircraft Supply (USA) |
| 6400-20-16-0-SS PRIMARY | Brennan Industries (USA) |
| Reference | Meaning |
|---|---|
| 516-5911058 | D/9 Drawing number reference only Naval Sea Systems Command |
NSN 4730-01-323-2070 is a Adapter,straight,tube to Boss, manufactured by Brennan Industries, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-323-2070 has 5 manufacturer part numbers on file: 516-5911058ITEM19 (Naval Sea Systems Command), 516-5911058-19 (Naval Sea Systems Command), 202702-16-20C (Danfoss Power Solutions II, Llc), AA67022-20-16JA (Allan Aircraft Supply Co., Llc Dba Allan Aircraft Supply), 6400-20-16-0-SS (Brennan Industries).
1 possible match (shared part number, not a government interchangeability claim): 6685-01-396-0939. Verify interchangeability with system specifications before substitution.
Key specifications for 6400-20-16-0-SS: Furnished Items and Quantity: 1 TUBE COUPLING NUT W/SLEEVE AND 1 PREFORMED PACKING; Connection Style: EXTERNAL SEAT FOR GASKET SEAL (BOSS) SECOND END; Connection Style: FLARED (TUBE) FIRST END; Nominal Overall Length: 2.300 INCHES IN. 15 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.