The Insert,tube Fitting, cataloged under National Stock Number 4730-01-135-8550, 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 Swagelok Co. Government technical data includes 6 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 4730-01-135-8550 |
| Primary Part Number | B-305-2 |
| Item Name | Insert,tube Fitting |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Swagelok Co |
| Status | ACTIVE |
| Style Designator | SERRATED |
| Sleeve Outside Diameter | 0.125 INCHES NOMINAL IN |
| Tube Inside Diameter for Which Designed | 0.125 INCHES NOMINAL IN |
| Casehardening Indicator | NOT CASEHARDENED |
| Material | COPPER ALLOY 360 |
| Flange Outside Diameter | 0.178 INCHES MINIMUM AND 0.188 INCHES MAXIMUM 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 |
|---|---|
| B-305-2 PRIMARY | Swagelok Co (USA) |
| Reference | Meaning |
|---|---|
| 7849737P001 | 7/2 Vendor item drawing reference Lockheed Martin Corporation Div Rms |
NSN 4730-01-135-8550 is a Insert,tube Fitting, manufactured by Swagelok Co, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-135-8550 has 1 manufacturer part number on file: B-305-2 (Swagelok Co).
Key specifications for B-305-2: Style Designator: SERRATED; Sleeve Outside Diameter: 0.125 INCHES NOMINAL IN; Tube Inside Diameter for Which Designed: 0.125 INCHES NOMINAL IN; Casehardening Indicator: NOT CASEHARDENED. 6 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.