The Adapter,straight,pipe to Tube, cataloged under National Stock Number 4730-00-103-1978, 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 Discovery Corporation. Government technical data includes 14 specifications, cited from the U.S. Government catalog. The record lists 9 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 7 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-00-103-1978 |
| Primary Part Number | 1888791 |
| Item Name | Adapter,straight,pipe to Tube |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Discovery Corporation |
| Status | ACTIVE |
| Furnished Items and Quantity | 1 TUBE COUPLING NUT AND 1 FERRULE SLEEVE |
| Connection Style | FLARELESS (TUBE) FIRST END |
| Connection Style | PLAIN (PIPE) SECOND END |
| Nominal Overall Length | 1.730 INCHES IN |
| Material Document and Classification | 66 FED STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Outside Diameter Tube Accommodated | 0.250 INCHES FIRST END IN |
| Nominal Thread Size | 0.500 INCHES SECOND END IN |
| Nominal Thread Size | 0.438 INCHES FIRST END IN |
| Seat Angle | 20.0 DEGREES FIRST END |
| Surface Treatment | PASSIVATE OVERALL |
| Thread Class | 3A FIRST END A |
| Material | STEEL COMP 316 OVERALL |
| Thread Series Designator | NPT SECOND END |
| Thread Series Designator | UNF FIRST 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 |
|---|---|
| 4CM8316 | Circor Instrumentation Technologies, Inc. Dba Hoke Gyrolok (USA) |
| SS-400-1-8 | South London Valve & Fitting Company Ltd T/a Swagelok London (GBR) |
| CV0096-106 | Northrop Grumman Corp Electronic Systems Defensive System Div (USA) |
| ISSD4MC8 | Ssp Fittings Corp (USA) |
| 4-8 FBZ-SS | Parker-Hannifin Corporation Div Instrumentation Products Division (USA) |
| 1888791 PRIMARY | Discovery Corporation (USA) |
| 4MSC8N-316 PRIMARY | Parker-Hannifin Corporation Div Instrumentation Products Division (USA) |
| SS400-1-8-316 | Swagelok Co (USA) |
| SS-400-1-8 PRIMARY | Swagelok Co (USA) |
| Reference | Meaning |
|---|---|
| 2D62117PK | D/9 Drawing number reference only U.S. Government activity |
| I4-8C-SS | 5/9 Secondary reference Ssp Fittings Corp |
| 533492-59 | 5/2 Secondary reference U.S. Government activity |
| 400-1-8-316 | 5/9 Secondary reference Swagelok Co |
| 2D62117PK-001 | 5/9 Secondary reference U.S. Government activity |
| 533492 | 7/1 Vendor item drawing reference U.S. Government activity |
| 4CM8-316 | 5/9 Secondary reference J R Douglass Company |
NSN 4730-00-103-1978 is a Adapter,straight,pipe to Tube, manufactured by Discovery Corporation, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-00-103-1978 has 9 manufacturer part numbers on file: 4CM8316 (Circor Instrumentation Technologies, Inc. Dba Hoke Gyrolok), SS-400-1-8 (South London Valve & Fitting Company Ltd T/a Swagelok London), CV0096-106 (Northrop Grumman Corp Electronic Systems Defensive System Div), ISSD4MC8 (Ssp Fittings Corp), 4-8 FBZ-SS (Parker-Hannifin Corporation Div Instrumentation Products Division) and 4 more.
3 possible matches (shared part number, not a government interchangeability claim): 4730-01-267-6978, 1560-01-553-8164, 4730-01-593-8069. Verify interchangeability with system specifications before substitution.
Key specifications for 1888791: Furnished Items and Quantity: 1 TUBE COUPLING NUT AND 1 FERRULE SLEEVE; Connection Style: FLARELESS (TUBE) FIRST END; Connection Style: PLAIN (PIPE) SECOND END; Nominal Overall Length: 1.730 INCHES IN. 14 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.