The Inverted Nut,tube Coupling, cataloged under National Stock Number 4730-01-157-3693, 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 Ber-Low Mfg., Inc Dba Butech Pressure Systems. Government technical data includes 14 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-01-157-3693 |
| Primary Part Number | 60G4-316 |
| Item Name | Inverted Nut,tube Coupling |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Ber-Low Mfg., Inc Dba Butech Pressure Systems |
| Status | ACTIVE |
| Width Across Flats | 0.620 INCHES NOMINAL IN |
| Seat Angle in Deg | 45.0 |
| Tube Outside Diameter for Which Designed | 0.250 INCHES NOMINAL IN |
| Style Designator | INVERTED NUT, TUBE, FLARE |
| Material Document and Classification | FED STD 66, COMP 316 FED STD SINGLE MATERIAL RESPONSE |
| Thread Direction | RIGHT-HAND |
| Casehardening Indicator | NOT CASEHARDENED |
| Thread Size | 9/16-18 |
| Screw Thread Series Designator | UNF |
| Surface Treatment | PASSIVATE |
| Thread Class | 3A A |
| Material | STEEL COMP 316 |
| Fabrication Method | ROD STOCK, MACHINED |
| Smallest Inside Diameter | 0.253 INCHES NOMINAL 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 |
|---|---|
| 60G4-316 PRIMARY | Ber-Low Mfg., Inc Dba Butech Pressure Systems (USA) |
NSN 4730-01-157-3693 is a Inverted Nut,tube Coupling, manufactured by Ber-Low Mfg., Inc Dba Butech Pressure Systems, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-157-3693 has 1 manufacturer part number on file: 60G4-316 (Ber-Low Mfg., Inc Dba Butech Pressure Systems).
Key specifications for 60G4-316: Width Across Flats: 0.620 INCHES NOMINAL IN; Seat Angle in Deg: 45.0; Tube Outside Diameter for Which Designed: 0.250 INCHES NOMINAL IN; Style Designator: INVERTED NUT, TUBE, FLARE. 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.