The Screw,externally Relieved Body, cataloged under National Stock Number 5305-01-377-9986, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Naval Sea Systems Command. Government technical data includes 17 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5305-01-377-9986 |
| Primary Part Number | 563-6404329-61 |
| Item Name | Screw,externally Relieved Body |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Extended Washer Thickness | 0.010 INCHES MINIMUM AND 0.030 INCHES MAXIMUM IN |
| Head Height | 0.160 INCHES NOMINAL IN |
| Fastener Length | 0.470 INCHES NOMINAL IN |
| Extended Washer Diameter | 0.440 INCHES NOMINAL IN |
| Thread Length | 0.390 INCHES NOMINAL IN |
| First Diameter From Head | 0.300 INCHES MINIMUM AND 0.310 INCHES MAXIMUM IN |
| Nominal Thread Diameter | 0.164 INCHES IN |
| Head Style | HEXAGON EXTENDED WASHER |
| Thread Direction | RIGHT-HAND |
| Width Between Flats | 0.500 INCHES NOMINAL IN |
| Distance From Largest Bearing Surface of Head to End of First Diameter | 0.310 INCHES MINIMUM AND 0.340 INCHES MAXIMUM IN |
| Externally Relieved Body Diameter Quantity | 2 |
| Internal Drive Style | SLOT |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 32 |
| Material | NICKEL ALLOY OVERALL |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| 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 |
|---|---|
| 563-6404329-61 PRIMARY | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| 563-7409379-61 | C/1 Advisory reference — outside the item-of-supply concept Zf Industrieantriebe Witten Gmbh |
NSN 5305-01-377-9986 is a Screw,externally Relieved Body, manufactured by Naval Sea Systems Command, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-377-9986 has 1 manufacturer part number on file: 563-6404329-61 (Naval Sea Systems Command).
Key specifications for 563-6404329-61: Extended Washer Thickness: 0.010 INCHES MINIMUM AND 0.030 INCHES MAXIMUM IN; Head Height: 0.160 INCHES NOMINAL IN; Fastener Length: 0.470 INCHES NOMINAL IN; Extended Washer Diameter: 0.440 INCHES NOMINAL IN. 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.