The Inverted Nut,tube Coupling, cataloged under National Stock Number 4730-00-288-8567, 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 Mid-State Sales, Inc. Div Defense Products Group. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-00-288-8567 |
| Primary Part Number | MSS87F1-4 |
| Item Name | Inverted Nut,tube Coupling |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Mid-State Sales, Inc. Div Defense Products Group |
| Status | ACTIVE |
| Width Across Flats | 0.500 INCHES NOMINAL IN |
| Seat Angle in Deg | 45.0 |
| Strength Rating | ERR-060 |
| Tube Outside Diameter for Which Designed | 0.250 INCHES NOMINAL IN |
| Style Designator | INVERTED NUT, TUBE, FLARE |
| Material Document and Classification | QQ-B-626, ALLOY 360 FED SPEC SINGLE MATERIAL RESPONSE |
| Thread Direction | RIGHT-HAND |
| Casehardening Indicator | NOT CASEHARDENED |
| Thread Size | 1/2-20 |
| Screw Thread Series Designator | UNF |
| Thread Class | 2A A |
| Material | COPPER ALLOY 360 |
| Fabrication Method | BAR STOCK, MACHINED |
| Smallest Inside Diameter | 0.266 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 |
|---|---|
| MSS87F1-4 PRIMARY | Mid-State Sales, Inc. Div Defense Products Group (USA) |
| Reference | Meaning |
|---|---|
| 87F1-4 | 5/9 Secondary reference Imperial |
NSN 4730-00-288-8567 is a Inverted Nut,tube Coupling, manufactured by Mid-State Sales, Inc. Div Defense Products Group, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-00-288-8567 has 1 manufacturer part number on file: MSS87F1-4 (Mid-State Sales, Inc. Div Defense Products Group).
Key specifications for MSS87F1-4: Width Across Flats: 0.500 INCHES NOMINAL IN; Seat Angle in Deg: 45.0; Strength Rating: ERR-060; Tube Outside Diameter for Which Designed: 0.250 INCHES NOMINAL 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.