The Sleeve,flared,tube Fitting, cataloged under National Stock Number 4730-01-043-6300, 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 Mcnaughton Dynamics Limited. Government technical data includes 11 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through both NSN and commercial part number lookups. 9 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4730-01-043-6300 |
| Primary Part Number | MS51533-4 |
| Item Name | Sleeve,flared,tube Fitting |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Mcnaughton Dynamics Limited |
| Status | ACTIVE |
| Seat Angle in Deg | 33.0 |
| Style Designator | SLEEVE |
| Material Document and Classification | FED STD 66, COMP 1137 FED STD 3RD MATERIAL RESPONSE OR FED STD 66, COMP 1141 FED STD 4TH MATERIAL RESPONSE OR FED STD 66, COMP 12L14 FED STD 5TH MATERIAL RESPONSE OR FED STD 66,COMP 11L37 FED STD 6TH MATERIAL RESPONSE |
| Sleeve Outside Diameter | 0.255 INCHES NOMINAL IN |
| Casehardening Indicator | NOT CASEHARDENED |
| Surface Treatment | CADMIUM |
| Flange Width | 0.140 INCHES NOMINAL IN |
| Material | STEEL COMP 1015 OR STEEL COMP 1020 OR STEEL COMP 1137 OR STEEL COMP 1141 OR STEEL COMP 12L14 OR STEEL COMP 11L37 |
| Flange Outside Diameter | 0.383 INCHES NOMINAL IN |
| Metallic Hardness Rating | 70.0 NOMINAL ROCKWELL B |
| Hose/tube Outside Diameter for Which Designed | 0.250 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 |
|---|---|
| MS51533-4 | Mcnaughton Dynamics Limited (GBR) |
| Reference | Meaning |
|---|---|
| 840-FS-04 | 5/9 Secondary reference Imperial |
| MS51533B4 | 2/2 Government specification standardization U.S. Government activity |
| 4730PL0977390 | 6/9 Informative reference only Jednolity Indeks Materialowy - Uniform Material Index |
| MS51533 | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
| 80JX604 | C/1 Advisory reference — outside the item-of-supply concept Cotta Transmission Co Llc |
| MS51533-4 | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
| MS51533-84 | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
| MIL-DTL-18866 | 4/1 Identification reference U.S. Government activity |
| MS51533-4C | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
NSN 4730-01-043-6300 is a Sleeve,flared,tube Fitting, manufactured by Mcnaughton Dynamics Limited, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-043-6300 has 1 manufacturer part number on file: MS51533-4 (Mcnaughton Dynamics Limited).
1 possible match (shared part number, not a government interchangeability claim): 4730-01-516-7512. Verify interchangeability with system specifications before substitution.
Key specifications for MS51533-4: Seat Angle in Deg: 33.0; Style Designator: SLEEVE; Material Document and Classification: FED STD 66, COMP 1137 FED STD 3RD MATERIAL RESPONSE OR FED STD 66, COMP 1141 FED STD 4TH MATERIAL RESPONSE OR FED STD 66, COMP 12L14 FED STD 5TH MATERIAL RESPONSE OR FED STD 66,COMP 11L37 FED STD 6TH MATERIAL RESPONSE; Overall Length: 0.410 INCHES NOMINAL IN. 11 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.