The Bolt,externally Relieved Body, cataloged under National Stock Number 5306-00-390-1561, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney. Government technical data includes 17 specifications, cited from the U.S. Government catalog. The record lists 6 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-00-390-1561 |
| Primary Part Number | 4037565 |
| Item Name | Bolt,externally Relieved Body |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney |
| Status | ACTIVE |
| Fastener Length | 0.910 INCHES MINIMUM AND 0.930 INCHES MAXIMUM IN |
| Thread Length | 0.460 INCHES MINIMUM AND 0.564 INCHES MAXIMUM IN |
| Hardness Rating | 34.0 ROCKWELL C MINIMUM AND 44.0 ROCKWELL C MAXIMUM OVERALL |
| Material Document and Classification | AMS 5708 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| First Diameter From Head | 0.330 INCHES MINIMUM AND 0.331 INCHES MAXIMUM IN |
| Distance From Largest Bearing Surface of Head to End of Second Diameter | 0.408 INCHES NOMINAL IN |
| Nominal Thread Diameter | 0.312 INCHES IN |
| Thread Direction | RIGHT-HAND |
| Second Diameter From Head | 0.247 INCHES MINIMUM AND 0.251 INCHES MAXIMUM IN |
| Distance From Largest Bearing Surface of Head to End of First Diameter | 0.095 INCHES MINIMUM AND 0.115 INCHES MAXIMUM IN |
| Externally Relieved Body Diameter Quantity | 2 |
| Minimum Tensile Strength | 175000 POUNDS PER SQUARE INCH LBS |
| Minimum Yield Strength | 115000 POUNDS PER SQUARE INCH LBS |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 24 |
| Material | NICKEL ALLOY OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | F |
| Part Number | Manufacturer |
|---|---|
| 4037565 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| 4037565 | Rtx Corporation Div Pratt & Whitney (USA) |
| 4037565 | M.s. Aerospace Inc. Dba Ms Aerospace Inc (USA) |
| 4037565 | Morton Grinding, Inc Dba Morton Manufacturing (USA) |
| 4037365 | Acufast Aircraft Products (USA) |
| 4037565 PRIMARY | Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney (USA) |
| Reference | Meaning |
|---|---|
| 4037565 | 5/9 Secondary reference Necchi Spa |
| 4037565 | 5/9 Secondary reference U.S. Government activity |
| 4037565 | 5/9 Secondary reference Turbo Power & Marine System Inc Sub of United Technologies Corp |
| 4037565 | 3/9 Design control — primary reference U.S. Government activity |
| 4037565 | 5/9 Secondary reference Maycor Appliance Parts and Service Co Div of Maytag Corp |
NSN 5306-00-390-1561 is a Bolt,externally Relieved Body, manufactured by Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney, classified under FSC 5306, Bolts. Status: active.
NSN 5306-00-390-1561 has 6 manufacturer part numbers on file: 4037565 (Sps Technologies, Llc Dba PB Fasteners), 4037565 (Rtx Corporation Div Pratt & Whitney), 4037565 (M.s. Aerospace Inc. Dba Ms Aerospace Inc), 4037565 (Morton Grinding, Inc Dba Morton Manufacturing), 4037365 (Acufast Aircraft Products) and 1 more.
Key specifications for 4037565: Fastener Length: 0.910 INCHES MINIMUM AND 0.930 INCHES MAXIMUM IN; Thread Length: 0.460 INCHES MINIMUM AND 0.564 INCHES MAXIMUM IN; Hardness Rating: 34.0 ROCKWELL C MINIMUM AND 44.0 ROCKWELL C MAXIMUM OVERALL; Material Document and Classification: AMS 5708 ASSN STD SINGLE MATERIAL RESPONSE OVERALL. 17 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.