The Cap,tube, cataloged under National Stock Number 4730-01-083-3031, 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 Northrop Grumman Support Services Corp. Government technical data includes 10 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-01-083-3031 |
| Primary Part Number | 121B374H01 |
| Item Name | Cap,tube |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Northrop Grumman Support Services Corp |
| Status | ACTIVE |
| Connection Style | PLAIN (OPTIONAL END) |
| Tube Outside Diameter for Which Designed | 1.340 INCHES MINIMUM AND 1.345 INCHES MAXIMUM IN |
| Style Designator | CAP |
| Material Document and Classification | QQ-A-225/8 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Thread Direction | RIGHT-HAND INTERNAL |
| Nominal Thread Size | 1.312 INCHES INTERNAL IN |
| Thread Class | 3B INTERNAL |
| Thread Quantity Per Inch | 18 INTERNAL |
| Material | ALUMINUM ALLOY OVERALL |
| Thread Series Designator | UNS INTERNAL |
| 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 |
|---|---|
| 121B374H01 PRIMARY | Northrop Grumman Support Services Corp (USA) |
| Reference | Meaning |
|---|---|
| 121B374 | D/9 Drawing number reference only U.S. Government activity |
| 121B374H01 | 3/9 Design control — primary reference U.S. Government activity |
NSN 4730-01-083-3031 is a Cap,tube, manufactured by Northrop Grumman Support Services Corp, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-083-3031 has 1 manufacturer part number on file: 121B374H01 (Northrop Grumman Support Services Corp).
Key specifications for 121B374H01: Connection Style: PLAIN (OPTIONAL END); Tube Outside Diameter for Which Designed: 1.340 INCHES MINIMUM AND 1.345 INCHES MAXIMUM IN; Style Designator: CAP; Material Document and Classification: QQ-A-225/8 FED SPEC SINGLE MATERIAL RESPONSE OVERALL. 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.