The Bolt,fluid Passage, cataloged under National Stock Number 4730-01-039-8920, 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 Eaton Aerospace Llc Dba Sterer Engineering Div M.c.aerospace. Government technical data includes 22 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-01-039-8920 |
| Primary Part Number | MC2331 |
| Item Name | Bolt,fluid Passage |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Eaton Aerospace Llc Dba Sterer Engineering Div M.c.aerospace |
| Status | ACTIVE |
| Width Across Flats | 0.362 INCHES MINIMUM AND 0.378 INCHES MAXIMUM IN |
| Second End Thread Quantity Per Inch | 20 |
| Second End Nominal Thread Size | 0.250 INCHES IN |
| Length From Bearing Surface of Wrenching Feature to End of First Diameter | 0.600 INCHES MINIMUM AND 0.620 INCHES MAXIMUM IN |
| Second End Thread Class | 2A A |
| Body Style | PLAIN |
| Concentric Hole Depth | 0.770 INCHES MINIMUM AND 0.830 INCHES MAXIMUM IN |
| Wrenching Feature Height | 0.160 INCHES MINIMUM AND 0.180 INCHES MAXIMUM IN |
| Second End Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Wrenching Feature Style | HEXAGON |
| Material Document and Classification | QQ-S-764,TYPE 303,COND A FED SPEC SINGLE MATERIAL RESPONSE |
| Second End Thread Direction | RIGHT-HAND |
| Length From Bearing Surface of Wrenching Feature to End of Second Diameter | 0.890 INCHES MINIMUM AND 0.930 INCHES MAXIMUM IN |
| Second End Style Designator | PLAIN |
| Length From Bearing Surface of Wrenching Feature to Bolt End | 0.960 INCHES MINIMUM AND 1.000 INCHES MAXIMUM IN |
| Concentric Hole Diameter | 0.080 INCHES MINIMUM AND 0.100 INCHES MAXIMUM IN |
| Surface Treatment | PASSIVATE |
| First Radial Fluid Hole Diameter | 0.080 INCHES MINIMUM AND 0.100 INCHES MAXIMUM IN |
| Distance From First Radial Hole Center to End of Bolt | 0.430 INCHES MINIMUM AND 0.470 INCHES MAXIMUM IN |
| Material | STEEL |
| Second End Thread Length | 0.290 INCHES MINIMUM AND 0.330 INCHES MAXIMUM IN |
| First Diameter From Wrenching Feature | 0.244 INCHES MINIMUM AND 0.249 INCHES MAXIMUM 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 |
|---|---|
| MC2331 PRIMARY | Eaton Aerospace Llc Dba Sterer Engineering Div M.c.aerospace (USA) |
NSN 4730-01-039-8920 is a Bolt,fluid Passage, manufactured by Eaton Aerospace Llc Dba Sterer Engineering Div M.c.aerospace, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-039-8920 has 1 manufacturer part number on file: MC2331 (Eaton Aerospace Llc Dba Sterer Engineering Div M.c.aerospace).
Key specifications for MC2331: Width Across Flats: 0.362 INCHES MINIMUM AND 0.378 INCHES MAXIMUM IN; Second End Thread Quantity Per Inch: 20; Second End Nominal Thread Size: 0.250 INCHES IN; Length From Bearing Surface of Wrenching Feature to End of First Diameter: 0.600 INCHES MINIMUM AND 0.620 INCHES MAXIMUM IN. 22 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.