The Bolt,externally Relieved Body, cataloged under National Stock Number 5306-01-303-3902, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is The Boeing Company Div Defense. Government technical data includes 27 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-01-303-3902 |
| Primary Part Number | 74D291033-2025 |
| Item Name | Bolt,externally Relieved Body |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Fourth Diameter From Head | 1.020 INCHES MINIMUM AND 1.030 INCHES MAXIMUM IN |
| Head Height | 0.470 INCHES NOMINAL IN |
| Fastener Length | 3.900 INCHES NOMINAL IN |
| Thread Length | 1.720 INCHES NOMINAL IN |
| Shank Unthreaded Hole Diameter | 0.250 INCHES MINIMUM AND 0.256 INCHES MAXIMUM FIRST HOLE IN |
| Hole Configuration Style | ROUND LONGITUDINAL HOLE |
| Material Document and Classification | AMS 5629 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| First Diameter From Head | 0.470 INCHES NOMINAL IN |
| Distance From Largest Bearing Surface of Head to End of Second Diameter | 0.980 INCHES NOMINAL IN |
| Nominal Thread Diameter | 1.125 INCHES IN |
| Distance From Largest Bearing Surface of Head to End of Third Diameter | 1.455 INCHES NOMINAL IN |
| Head Style | PAN |
| Thread Direction | RIGHT-HAND |
| Second Diameter From Head | 1.015 INCHES MINIMUM AND 1.025 INCHES MAXIMUM IN |
| Distance From Largest Bearing Surface of Head to End of First Diameter | 0.400 INCHES NOMINAL IN |
| Externally Relieved Body Diameter Quantity | 4 |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 20 |
| Material | STEEL COMP XM-13 OVERALL |
| Hole Quantity | 1 |
| Distance From Largest Bearing Surface of Head to End of Fourth Diameter | 1.580 INCHES NOMINAL IN |
| Third Diameter From Head | 1.045 INCHES MINIMUM AND 1.055 INCHES MAXIMUM IN |
| Thread Series Designator | UN |
| Distance From Head Largest Bearing Surface to Shank Hole Center | 1.200 INCHES NOMINAL FIRST HOLE IN |
| Hole Type | DRILLED |
| Hole Diameter | 0.270 INCHES NOMINAL IN |
| Head Diameter | 1.000 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 |
|---|---|
| 74D291033-2025 PRIMARY | The Boeing Company Div Defense (USA) |
| Reference | Meaning |
|---|---|
| 74D291033-2009 | 5/9 Secondary reference The Boeing Company Div Defense |
NSN 5306-01-303-3902 is a Bolt,externally Relieved Body, manufactured by The Boeing Company Div Defense, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-303-3902 has 1 manufacturer part number on file: 74D291033-2025 (The Boeing Company Div Defense).
Key specifications for 74D291033-2025: Fourth Diameter From Head: 1.020 INCHES MINIMUM AND 1.030 INCHES MAXIMUM IN; Head Height: 0.470 INCHES NOMINAL IN; Fastener Length: 3.900 INCHES NOMINAL IN; Thread Length: 1.720 INCHES NOMINAL IN. 27 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.