The Bolt,fluid Passage, cataloged under National Stock Number 4730-00-890-7947, 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 Webluk Machine Corp. Government technical data includes 29 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-00-890-7947 |
| Primary Part Number | 1526-31A |
| Item Name | Bolt,fluid Passage |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Webluk Machine Corp |
| Status | ACTIVE |
| First End Thread Series Designator | UNF |
| First End Thread Direction | RIGHT-HAND |
| Second End Nominal Thread Size | 0.250 INCHES IN |
| Length From Bearing Surface of Wrenching Feature to End of First Diameter | 3.000 INCHES NOMINAL IN |
| Second End Thread Class | 2B |
| Body Style | SHOULDER |
| Distance From Centerline to Flat | 0.250 INCHES NOMINAL IN |
| First End Thread Class | 3A A |
| Cotter Pin Hole Diameter | 0.080 INCHES NOMINAL IN |
| First End Style Designator | PLAIN |
| Second Diameter From Wrenching Feature | 0.250 INCHES NOMINAL IN |
| Concentric Hole Depth | 1.500 INCHES NOMINAL IN |
| Wrenching Feature Height | 0.300 INCHES NOMINAL IN |
| Second End Thread Series Designator | UNF |
| First End Thread Length | 0.380 INCHES NOMINAL IN |
| Wrenching Feature Style | ROUND WITH WRENCH FLATS |
| Second End Thread Direction | RIGHT-HAND |
| Length From Bearing Surface of Wrenching Feature to End of Second Diameter | 3.075 INCHES NOMINAL IN |
| Second End Style Designator | DOUBLE COMPRESSION |
| Length From Bearing Surface of Wrenching Feature to Bolt End | 3.380 INCHES NOMINAL IN |
| Second End Seat Radius | 0.010 INCHES NOMINAL IN |
| First End Connection Type | THREADED EXTERNAL TUBE |
| Concentric Hole Diameter | 0.090 INCHES NOMINAL IN |
| Distance From Bolt End to Hole Center | 0.140 INCHES NOMINAL IN |
| Surface Treatment | CADMIUM |
| First Radial Fluid Hole Diameter | 0.090 INCHES NOMINAL IN |
| Distance From First Radial Hole Center to End of Bolt | 2.318 INCHES NOMINAL IN |
| Material | STEEL COMP 4130 |
| Second End Thread Length | 0.220 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 |
NSN 4730-00-890-7947 is a Bolt,fluid Passage, manufactured by Webluk Machine Corp, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-00-890-7947 has 2 manufacturer part numbers on file: 1526-31A (Goodrich Corporation), 1526-31A (Webluk Machine Corp).
Key specifications for 1526-31A: First End Thread Series Designator: UNF; First End Thread Direction: RIGHT-HAND; Second End Nominal Thread Size: 0.250 INCHES IN; Length From Bearing Surface of Wrenching Feature to End of First Diameter: 3.000 INCHES NOMINAL IN. 29 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.