The Expansion Joint,pipe, cataloged under National Stock Number 4730-01-238-7105, 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 Hyspan Precision Products, Inc.. Government technical data includes 4 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 4 items share a part number with this NSN in the catalog (possible match — not a government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 | 4730-01-238-7105 |
| Primary Part Number | 31066 |
| Item Name | Expansion Joint,pipe |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Hyspan Precision Products, Inc. |
| Status | ACTIVE |
| Design Type | CORRUGATED ELEMENT |
| Equalization Characteristic | SELF-EQUALIZING |
| Joint Type | SINGLE |
| Flange Outside Diameter | 20.000 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 |
|---|---|
| 31066 PRIMARY | Hyspan Precision Products, Inc. (USA) |
| Reference | Meaning |
|---|---|
| 34150REVA | C/1 Advisory reference — outside the item-of-supply concept Hyspan Precision Products, Inc. Dba Hyspan Precision Products Inc |
| 31066 | 3/9 Design control — primary reference Hyspan Precision Products, Inc. Dba Hyspan Precision Products Inc |
NSN 4730-01-238-7105 is a Expansion Joint,pipe, manufactured by Hyspan Precision Products, Inc., classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-238-7105 has 1 manufacturer part number on file: 31066 (Hyspan Precision Products, Inc.).
4 possible matches (shared part number, not a government interchangeability claim): 5340-01-247-9350, 5950-01-276-8107, 6515-01-390-6699. Verify interchangeability with system specifications before substitution.
Key specifications for 31066: Design Type: CORRUGATED ELEMENT; Equalization Characteristic: SELF-EQUALIZING; Overall Length: 7.000 INCHES NOMINAL IN; Joint Type: SINGLE. 4 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.