The Screw,externally Relieved Body, cataloged under National Stock Number 5305-00-656-0004, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. Government technical data includes 25 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-00-656-0004 |
| Item Name | Screw,externally Relieved Body |
| FSC / FSG | 5305 / 53 — Screws |
| Status | ACTIVE |
| Fourth Diameter From Head | 0.250 INCHES NOMINAL IN |
| Distance From Largest Bearing Surface of Head to End of Fifth Diameter | 4.125 INCHES NOMINAL IN |
| Head Height | 0.125 INCHES NOMINAL IN |
| Fastener Length | 4.374 INCHES NOMINAL IN |
| Thread Length | 0.249 INCHES MINIMUM IN |
| Material Document and Classification | QQ-S-763 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| First Diameter From Head | 0.188 INCHES NOMINAL IN |
| Distance From Largest Bearing Surface of Head to End of Second Diameter | 2.625 INCHES NOMINAL IN |
| Nominal Thread Diameter | 0.164 INCHES IN |
| Distance From Largest Bearing Surface of Head to End of Third Diameter | 4.000 INCHES NOMINAL IN |
| Head Style | FILLISTER |
| Thread Direction | RIGHT-HAND |
| Second Diameter From Head | 0.125 INCHES NOMINAL IN |
| Distance From Largest Bearing Surface of Head to End of First Diameter | 2.344 INCHES NOMINAL IN |
| Fifth Diameter From Head | 0.130 INCHES NOMINAL IN |
| Externally Relieved Body Diameter Quantity | 1 |
| Surface Treatment | PASSIVATE OVERALL |
| Internal Drive Style | CROSS RECESS TYPE 1 |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 32 |
| Material | STEEL COMP 302 OVERALL |
| Distance From Largest Bearing Surface of Head to End of Fourth Diameter | 4.094 INCHES NOMINAL IN |
| Third Diameter From Head | 0.188 INCHES NOMINAL IN |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Head Diameter | 0.250 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 |
| Reference | Meaning |
|---|---|
| 501B66 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5305-00-656-0004 is a Screw,externally Relieved Body, classified under FSC 5305, Screws. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 5305-00-979-6908. Verify interchangeability with system specifications before substitution.
Key specifications for 5305-00-656-0004: Fourth Diameter From Head: 0.250 INCHES NOMINAL IN; Distance From Largest Bearing Surface of Head to End of Fifth Diameter: 4.125 INCHES NOMINAL IN; Head Height: 0.125 INCHES NOMINAL IN; Fastener Length: 4.374 INCHES NOMINAL IN. 25 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.