The Adapter,straight,pipe to Tube, cataloged under National Stock Number 4730-00-691-5461, 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 Parker-Hannifin Corporation Div Instrumentation Products Division. Government technical data includes 17 specifications, cited from the U.S. Government catalog. The record lists 6 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 10 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government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 | 4730-00-691-5461 |
| Primary Part Number | 6MSC8N-316 |
| Item Name | Adapter,straight,pipe to Tube |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Parker-Hannifin Corporation Div Instrumentation Products Division |
| 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 | 1.790 INCHES IN |
| Connection Type | THREADED EXTERNAL PIPE SECOND END |
| Connection Type | THREADED EXTERNAL TUBE FIRST END |
| Material Document and Classification | 66 FED STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Outside Diameter Tube Accommodated | 0.375 INCHES FIRST END IN |
| Nominal Thread Size | 0.500 INCHES SECOND END IN |
| Nominal Thread Size | 0.562 INCHES FIRST END IN |
| Seat Angle | 20.0 DEGREES FIRST END |
| Surface Treatment | PASSIVATE OVERALL |
| Thread Class | 2A FIRST END A |
| Thread Quantity Per Inch | 20 FIRST END |
| Material | STEEL COMP 316 OVERALL |
| Thread Series Designator | UN FIRST END |
| Thread Series Designator | NPT 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 |
|---|---|
| 6CM8316 | Circor Instrumentation Technologies, Inc. Dba Hoke Gyrolok (USA) |
| SS6-1MC-8 | Tylok International, Inc. (USA) |
| SS-600-1-8 | South London Valve & Fitting Company Ltd T/a Swagelok London (GBR) |
| CV0240-011 | Northrop Grumman Corp Electronic Systems Defensive System Div (USA) |
| 6MSC8N-316 PRIMARY | Parker-Hannifin Corporation Div Instrumentation Products Division (USA) |
| 6-8 FBZ-SS PRIMARY | Parker-Hannifin Corporation Div Instrumentation Products Division (USA) |
| Reference | Meaning |
|---|---|
| 120-07511-8 | 5/9 Secondary reference Aqua-Chem, Inc. |
| SS-600-1-8 | 5/9 Secondary reference Swagelok Co |
| 533492 | 7/1 Vendor item drawing reference U.S. Government activity |
| 13229E0682 | 7/1 Vendor item drawing reference U.S. Government activity |
| 13229E0682-8 | 7/2 Vendor item drawing reference U.S. Government activity |
| 120-07511-8 | C/1 Advisory reference — outside the item-of-supply concept Aqua-Chem, Inc. Dba Aqua-Chem Inc |
| 533492-65 | 5/2 Secondary reference U.S. Government activity |
| 6CM8-316 | 5/9 Secondary reference J R Douglass Company |
| AI6-8C | 5/9 Secondary reference Ssp Fittings Corp |
| 600-1-8-316 | 5/9 Secondary reference Swagelok Co |
NSN 4730-00-691-5461 is a Adapter,straight,pipe to Tube, manufactured by Parker-Hannifin Corporation Div Instrumentation Products Division, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-00-691-5461 has 6 manufacturer part numbers on file: 6CM8316 (Circor Instrumentation Technologies, Inc. Dba Hoke Gyrolok), SS6-1MC-8 (Tylok International, Inc.), SS-600-1-8 (South London Valve & Fitting Company Ltd T/a Swagelok London), CV0240-011 (Northrop Grumman Corp Electronic Systems Defensive System Div), 6MSC8N-316 (Parker-Hannifin Corporation Div Instrumentation Products Division) and 1 more.
3 possible matches (shared part number, not a government interchangeability claim): 4730-00-691-5464, 4730-01-558-6025, 4730-01-594-2087. Verify interchangeability with system specifications before substitution.
Key specifications for 6MSC8N-316: 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: 1.790 INCHES IN. 17 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.