The Bolt,fluid Passage, cataloged under National Stock Number 4730-00-273-2341, 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 Cm Manufacturing Inc Dba Cm Manufacturing Inc. Government technical data includes 28 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 4730-00-273-2341 |
| Primary Part Number | 1281326-101 |
| Item Name | Bolt,fluid Passage |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Cm Manufacturing Inc Dba Cm Manufacturing Inc |
| Status | ACTIVE |
| First End Thread Series Designator | UNF |
| Width Across Flats | 0.928 INCHES MINIMUM AND 0.940 INCHES MAXIMUM IN |
| First End Thread Direction | RIGHT-HAND |
| Second End Thread Quantity Per Inch | 28 |
| Second End Nominal Thread Size | 0.250 INCHES IN |
| Length From Bearing Surface of Wrenching Feature to End of First Diameter | 3.125 INCHES NOMINAL IN |
| Second End Thread Class | 3B |
| Body Style | PLAIN |
| First End Thread Class | 3A A |
| Cotter Pin Hole Diameter | 0.141 INCHES MINIMUM AND 0.151 INCHES MAXIMUM IN |
| First End Thread Quantity Per Inch | 18 |
| First End Style Designator | PLAIN |
| Concentric Hole Depth | 2.050 INCHES NOMINAL IN |
| Wrenching Feature Height | 0.160 INCHES NOMINAL IN |
| Second End Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| First End Thread Length | 0.543 INCHES NOMINAL IN |
| Wrenching Feature Style | HEXAGON |
| Second End Thread Direction | RIGHT-HAND |
| Second End Style Designator | DOUBLE COMPRESSION |
| Length From Bearing Surface of Wrenching Feature to Bolt End | 3.668 INCHES NOMINAL IN |
| Second End Seat Radius | 0.062 INCHES NOMINAL IN |
| First End Connection Type | THREADED EXTERNAL TUBE |
| Concentric Hole Diameter | 0.105 INCHES MINIMUM AND 0.110 INCHES MAXIMUM IN |
| Distance From Bolt End to Hole Center | 0.114 INCHES MINIMUM AND 0.134 INCHES MAXIMUM IN |
| Surface Treatment | CADMIUM |
| First Radial Fluid Hole Diameter | 0.105 INCHES MINIMUM AND 0.110 INCHES MAXIMUM IN |
| Distance From First Radial Hole Center to End of Bolt | 1.205 INCHES NOMINAL IN |
| Material | STEEL |
| 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 |
|---|---|
| 1281326-101 | Cm Manufacturing Inc Dba Cm Manufacturing Inc (USA) |
| Reference | Meaning |
|---|---|
| 1281326-101 | 5/2 Secondary reference U.S. Government activity |
| 1281326-101 | 3/9 Design control — primary reference Lockheed Martin Services, Llc |
NSN 4730-00-273-2341 is a Bolt,fluid Passage, manufactured by Cm Manufacturing Inc Dba Cm Manufacturing Inc, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-00-273-2341 has 1 manufacturer part number on file: 1281326-101 (Cm Manufacturing Inc Dba Cm Manufacturing Inc).
Key specifications for 1281326-101: First End Thread Series Designator: UNF; Width Across Flats: 0.928 INCHES MINIMUM AND 0.940 INCHES MAXIMUM IN; First End Thread Direction: RIGHT-HAND; Second End Thread Quantity Per Inch: 28. 28 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.