The Cap,tube, cataloged under National Stock Number 4730-01-537-2027, 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 Dba Pneutronics Div Tube Fittings Division. Government technical data includes 10 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-01-537-2027 |
| Primary Part Number | 12FNML |
| Item Name | Cap,tube |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Parker-Hannifin Corporation Dba Pneutronics Div Tube Fittings Division |
| Status | ACTIVE |
| Connection Style | PLAIN (OPTIONAL END) |
| Tube Outside Diameter for Which Designed | 0.750 INCHES NOMINAL IN |
| Style Designator | CAP |
| Thread Direction | RIGHT-HAND INTERNAL |
| Nominal Thread Size | 1.188 INCHES INTERNAL IN |
| Surface Treatment | PASSIVATE OVERALL |
| Thread Class | 2B INTERNAL |
| Thread Quantity Per Inch | 12 INTERNAL |
| Material | STEEL CORROSION RESISTING OVERALL |
| Thread Series Designator | UNF INTERNAL |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
NSN 4730-01-537-2027 is a Cap,tube, manufactured by Parker-Hannifin Corporation Dba Pneutronics Div Tube Fittings Division, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-537-2027 has 2 manufacturer part numbers on file: 12FNML (Parker-Hannifin Corporation Dba Pneutronics Div Tube Fittings Division), 12FNML (Parker Hannifin Limited).
1 possible match (shared part number, not a government interchangeability claim): 4730-01-690-5857. Verify interchangeability with system specifications before substitution.
Key specifications for 12FNML: Connection Style: PLAIN (OPTIONAL END); Tube Outside Diameter for Which Designed: 0.750 INCHES NOMINAL IN; Style Designator: CAP; Thread Direction: RIGHT-HAND INTERNAL. 10 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.