The Hose Assembly,metallic, cataloged under National Stock Number 4720-01-276-2431, is classified within Federal Supply Class 4720 (Hose and Flexible Tubing) of the Pipe, Tubing, Hose, and Fittings group. The manufacturer of record is American Boa Inc. Government technical data includes 15 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4720-01-276-2431 |
| Primary Part Number | C101-509-A |
| Item Name | Hose Assembly,metallic |
| FSC / FSG | 4720 / 47 — Hose and Flexible Tubing |
| Manufacturer | American Boa Inc |
| Status | ACTIVE |
| Measuring Method and Length | 9.000 INCHES NOMINAL OVERALL IN |
| Minimum Inside Bending Radius | 2.000 INCHES IN |
| Connection Style | PLAIN OPTIONAL END FIRST END |
| End Connection Design | STRAIGHT FIRST END |
| Layer Composition and Location | OUTER LAYER BRAIDED BRONZE WIRE OR OUTER LAYER BRAIDED CORROSION RESISTANT STEEL WIRE |
| Connection Type | THREADED INTERNAL PIPE FIRST END |
| Cross-Sectional Shape Style | ROUND |
| Outside Diameter | 0.547 INCHES NOMINAL IN |
| Features Provided | IDENTICAL ENDS |
| Thread Direction | RIGHT-HAND FIRST END |
| Nominal Thread Size | 0.250 INCHES FIRST END IN |
| Unable to Decode | UNABLE TO DECODE |
| Inside Diameter | 0.312 INCHES NOMINAL IN |
| Thread Series Designator | NPT FIRST END |
| Unable to Decode | UNABLE TO DECODE |
| 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 |
|---|---|
| C101-509-A PRIMARY | American Boa Inc (USA) |
| Reference | Meaning |
|---|---|
| 300409 | 5/2 Secondary reference U.S. Government activity |
| 31-15-2286 | 7/2 Vendor item drawing reference U.S. Government activity |
NSN 4720-01-276-2431 is a Hose Assembly,metallic, manufactured by American Boa Inc, classified under FSC 4720, Hose and Flexible Tubing. Status: active.
NSN 4720-01-276-2431 has 1 manufacturer part number on file: C101-509-A (American Boa Inc).
2 possible matches (shared part number, not a government interchangeability claim): 4820-01-531-7145, 4720-01-614-3942. Verify interchangeability with system specifications before substitution.
Key specifications for C101-509-A: Measuring Method and Length: 9.000 INCHES NOMINAL OVERALL IN; Minimum Inside Bending Radius: 2.000 INCHES IN; Connection Style: PLAIN OPTIONAL END FIRST END; End Connection Design: STRAIGHT FIRST END. 15 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.