The Adapter,straight,tube to Boss, cataloged under National Stock Number 4730-01-689-3877, 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 Fitting Source, Inc Dba Fitting Source Inc. Government technical data includes 4 specifications, 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4730-01-689-3877 |
| Primary Part Number | 850BX20-NZ |
| Item Name | Adapter,straight,tube to Boss |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Fitting Source, Inc Dba Fitting Source Inc |
| Status | ACTIVE |
| Nominal Overall Length | 2.17 INCHES IN |
| Nominal Thread Size | 1.625 INCHES ALL ENDS IN |
| Surface Treatment | NICKEL AND ZINC OVERALL |
| Material | STEEL OVERALL |
| 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 |
|---|---|
| 850BX20-NZ PRIMARY | Fitting Source, Inc Dba Fitting Source Inc (USA) |
| Reference | Meaning |
|---|---|
| 4129AS0201 | D/9 Drawing number reference only Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier |
NSN 4730-01-689-3877 is a Adapter,straight,tube to Boss, manufactured by Fitting Source, Inc Dba Fitting Source Inc, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-689-3877 has 1 manufacturer part number on file: 850BX20-NZ (Fitting Source, Inc Dba Fitting Source Inc).
1 possible match (shared part number, not a government interchangeability claim): 4730-01-689-3888. Verify interchangeability with system specifications before substitution.
Key specifications for 850BX20-NZ: Nominal Overall Length: 2.17 INCHES IN; Nominal Thread Size: 1.625 INCHES ALL ENDS IN; Surface Treatment: NICKEL AND ZINC OVERALL; Part Name Assigned by Controlling Agency: ADAPTER. 4 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.