The Bolt,fluid Passage, cataloged under National Stock Number 4730-00-004-4746, 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 Spiral Tool Corporation Dba Stc Industries. Government technical data includes 28 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 4730-00-004-4746 |
| Primary Part Number | A51G20517-1 |
| Item Name | Bolt,fluid Passage |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Spiral Tool Corporation Dba Stc Industries |
| Status | ACTIVE |
| First End Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| First End Thread Direction | RIGHT-HAND |
| Second End Nominal Thread Size | 0.125 INCHES IN |
| Length From Bearing Surface of Wrenching Feature to End of First Diameter | 1.464 INCHES MINIMUM AND 1.469 INCHES MAXIMUM IN |
| Body Style | SHOULDER |
| Distance From Centerline to Flat | 0.344 INCHES NOMINAL IN |
| First End Thread Class | 3A A |
| Cotter Pin Hole Diameter | 0.075 INCHES MINIMUM AND 0.080 INCHES MAXIMUM IN |
| First End Style Designator | PLAIN |
| Second Diameter From Wrenching Feature | 0.191 INCHES MINIMUM AND 0.201 INCHES MAXIMUM IN |
| Concentric Hole Depth | 1.500 INCHES NOMINAL IN |
| Wrenching Feature Height | 0.125 INCHES NOMINAL IN |
| Second End Thread Series Designator | NPT |
| Hardness Rating | 46.0 ROCKWELL C MINIMUM AND 49.0 ROCKWELL C MAXIMUM |
| First End Thread Length | 0.339 INCHES NOMINAL IN |
| Criticality Code Justification | FEAT |
| Wrenching Feature Style | ROUND WITH WRENCH FLATS |
| Material Document and Classification | FSC-26512-G-1010 MFR REF SINGLE MATERIAL RESPONSE |
| Second End Thread Direction | RIGHT-HAND |
| Length From Bearing Surface of Wrenching Feature to End of Second Diameter | 1.526 INCHES MINIMUM AND 1.531 INCHES MAXIMUM IN |
| Second End Style Designator | PLAIN |
| Length From Bearing Surface of Wrenching Feature to Bolt End | 1.803 INCHES MINIMUM AND 1.808 INCHES MAXIMUM IN |
| Concentric Hole Diameter | 0.097 INCHES MINIMUM AND 0.102 INCHES MAXIMUM IN |
| Distance From Bolt End to Hole Center | 0.140 INCHES NOMINAL IN |
| Surface Treatment | CHROMIUM |
| First Radial Fluid Hole Diameter | 0.097 INCHES MINIMUM AND 0.102 INCHES MAXIMUM IN |
| Distance From First Radial Hole Center to End of Bolt | 1.022 INCHES MINIMUM AND 1.027 INCHES MAXIMUM 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 |
|---|---|
| A51G20517-1 PRIMARY | Spiral Tool Corporation Dba Stc Industries (USA) |
| A51G20517-1 | Howe Machine & Tool Corp. Dba Howe Machine & Tool Corp (USA) |
| Reference | Meaning |
|---|---|
| A51G20517-1 | 5/9 Secondary reference Northrop Grumman Systems Corporation |
NSN 4730-00-004-4746 is a Bolt,fluid Passage, manufactured by Spiral Tool Corporation Dba Stc Industries, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-00-004-4746 has 2 manufacturer part numbers on file: A51G20517-1 (Spiral Tool Corporation Dba Stc Industries), A51G20517-1 (Howe Machine & Tool Corp. Dba Howe Machine & Tool Corp).
Key specifications for A51G20517-1: First End Thread Series Designator: UNIFIED NATIONAL JOINT FINE (UNJF); First End Thread Direction: RIGHT-HAND; Second End Nominal Thread Size: 0.125 INCHES IN; Length From Bearing Surface of Wrenching Feature to End of First Diameter: 1.464 INCHES MINIMUM AND 1.469 INCHES MAXIMUM IN. 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.