The Adapter,straight,flange to Tube, cataloged under National Stock Number 4730-00-866-1653, 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 Allison Transmission Inc Dba Allison Transmission, Inc. Government technical data includes 20 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-00-866-1653 |
| Primary Part Number | 6860924 |
| Item Name | Adapter,straight,flange to Tube |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Allison Transmission Inc Dba Allison Transmission, Inc |
| Status | ACTIVE |
| Flange Shape | RECTANGULAR WITH HOLES SECOND END |
| Flange Face Design | PLAIN SECOND END |
| Connection Style | INVERTED FLARE (TUBE) FIRST END |
| Nominal Length | 1.750 INCHES SECOND END IN |
| Nominal Overall Length | 1.050 INCHES IN |
| Connection Type | FLANGE SECOND END |
| Connection Type | THREADED EXTERNAL TUBE FIRST END |
| Material Document and Classification | AMS5646 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Bolt Hole Nominal Diameter | 0.281 INCHES SECOND END IN |
| Nominal Outside Diameter Tube Accommodated | 0.600 INCHES FIRST END IN |
| Nominal Thread Size | 0.750 INCHES FIRST END IN |
| Seat Angle | 30.0 DEGREES FIRST END |
| Center to Center Nominal Distance Between Bolt Holes Along Width | 0.984 INCHES SECOND END IN |
| Bolt Hole Quantity | 4 SECOND END |
| Nominal Width | 1.555 INCHES SECOND END IN |
| Center to Center Nominal Distance Between Bolt Holes Along Length | 1.178 INCHES SECOND END IN |
| Thread Class | 3A FIRST END A |
| Material | STEEL CORROSION RESISTING OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) FIRST END |
| Nominal Thickness | 0.125 INCHES SECOND END 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 |
|---|---|
| 6860924 PRIMARY | Allison Transmission Inc Dba Allison Transmission, Inc (USA) |
| 6860924 | Rolls-Royce Airlines (GBR) |
| EU80077 | Rolls-Royce Airlines (GBR) |
| Reference | Meaning |
|---|---|
| TF59-4-4-SS | 3/2 Design control — primary reference U.S. Government activity |
NSN 4730-00-866-1653 is a Adapter,straight,flange to Tube, manufactured by Allison Transmission Inc Dba Allison Transmission, Inc, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-00-866-1653 has 3 manufacturer part numbers on file: 6860924 (Allison Transmission Inc Dba Allison Transmission, Inc), 6860924 (Rolls-Royce Airlines), EU80077 (Rolls-Royce Airlines).
Key specifications for 6860924: Flange Shape: RECTANGULAR WITH HOLES SECOND END; Flange Face Design: PLAIN SECOND END; Connection Style: INVERTED FLARE (TUBE) FIRST END; Nominal Length: 1.750 INCHES SECOND END IN. 20 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.