The Reducer,tube, cataloged under National Stock Number 4730-01-436-2137, 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 Aerofit, Llc. Government technical data includes 12 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-01-436-2137 |
| Primary Part Number | AFP21916J1608 |
| Item Name | Reducer,tube |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Aerofit, Llc |
| Status | ACTIVE |
| Connection Style | PLAIN (TUBE) ALL ENDS |
| Nominal Overall Length | 1.640 INCHES IN |
| Connection Type | THREADED EXTERNAL TUBE ALL ENDS |
| Material Document and Classification | QQ-S-763 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Outside Diameter Tube Accommodated | 0.500 INCHES SECOND END IN |
| Nominal Outside Diameter Tube Accommodated | 1.000 INCHES FIRST END IN |
| Nominal Thread Size | 0.750 INCHES SECOND END IN |
| Nominal Thread Size | 1.312 INCHES FIRST END IN |
| Thread Class | 3A ALL ENDS A |
| Material | STEEL COMP 304 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) ALL ENDS |
| Reducer Type | CONCENTRIC |
| 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 |
|---|---|
| AFP21916J1608 PRIMARY | Aerofit, Llc (USA) |
| Reference | Meaning |
|---|---|
| AP21916 | D/9 Drawing number reference only Aerofit, Llc |
NSN 4730-01-436-2137 is a Reducer,tube, manufactured by Aerofit, Llc, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-436-2137 has 1 manufacturer part number on file: AFP21916J1608 (Aerofit, Llc).
Key specifications for AFP21916J1608: Connection Style: PLAIN (TUBE) ALL ENDS; Nominal Overall Length: 1.640 INCHES IN; Connection Type: THREADED EXTERNAL TUBE ALL ENDS; Material Document and Classification: QQ-S-763 FED SPEC SINGLE MATERIAL RESPONSE OVERALL. 12 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.