The Elbow,pipe to Boss, cataloged under National Stock Number 4730-01-085-1618, 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 Guill Tool & Engineering Co Inc Div Guill Defense. Government technical data includes 20 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-01-085-1618 |
| Primary Part Number | 2621-021-02ASSY6 |
| Item Name | Elbow,pipe to Boss |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Guill Tool & Engineering Co Inc Div Guill Defense |
| Status | ACTIVE |
| Furnished Items and Quantity | 2 PREFORMED PACKING AND 1 LOCKNUT AND 1 BACKUP WASHER |
| Flow Angle | 90.0 DEGREES |
| Nominal Pipe Size Accommodated | 0.250 INCHES FIRST END IN |
| Connection Style | DOUBLE THREADED SECTION W/ GASKET AND LOCKNUT SEALING (BOSS) SECOND END |
| Connection Style | SOCKET BRAZING RING (PIPE) FIRST END |
| Union Joint Location | FIRST END |
| Connection Type | UNTHREADED INTERNAL PIPE FIRST END |
| Connection Type | THREADED EXTERNAL BOSS SECOND END |
| Material Document and Classification | QQ-N-281 FED SPEC SINGLE MATERIAL RESPONSE NUT |
| Material Document and Classification | QQ-C-390,ALY D5 FED SPEC SINGLE MATERIAL RESPONSE TAILPIECE |
| Operating Pressure | 3000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Leg Length | 1.250 INCHES NOMINAL SECOND END IN |
| Leg Length | 2.188 INCHES NOMINAL FIRST END IN |
| Nominal Thread Size | 0.750 INCHES SECOND END IN |
| Pipe Wall Thickness Designation for Which Designed | SCHEDULE STD FIRST END |
| Thread Class | 2A SECOND END A |
| Material | NICKEL ALLOY NUT |
| Material | COPPER ALLOY TAILPIECE |
| Material | STEEL COMP 304 BODY |
| Thread Series Designator | UNF SECOND END |
| 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 |
|---|---|
| 2621-021-02ASSY6 PRIMARY | Guill Tool & Engineering Co Inc Div Guill Defense (USA) |
| Reference | Meaning |
|---|---|
| 262102102-0006 | 5/2 Secondary reference U.S. Government activity |
| 2621-021-02ASSY6 | 3/2 Design control — primary reference U.S. Government activity |
NSN 4730-01-085-1618 is a Elbow,pipe to Boss, manufactured by Guill Tool & Engineering Co Inc Div Guill Defense, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-085-1618 has 1 manufacturer part number on file: 2621-021-02ASSY6 (Guill Tool & Engineering Co Inc Div Guill Defense).
Key specifications for 2621-021-02ASSY6: Furnished Items and Quantity: 2 PREFORMED PACKING AND 1 LOCKNUT AND 1 BACKUP WASHER; Flow Angle: 90.0 DEGREES; Nominal Pipe Size Accommodated: 0.250 INCHES FIRST END IN; Connection Style: DOUBLE THREADED SECTION W/ GASKET AND LOCKNUT SEALING (BOSS) SECOND END. 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.