The Screw,externally Relieved Body, cataloged under National Stock Number 5305-00-778-7828, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. Government technical data includes 22 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5305-00-778-7828 |
| Item Name | Screw,externally Relieved Body |
| FSC / FSG | 5305 / 53 — Screws |
| Status | ACTIVE |
| Fourth Diameter From Head | 0.173 INCHES MINIMUM AND 0.181 INCHES MAXIMUM IN |
| Head Height | 0.205 INCHES MAXIMUM IN |
| Fastener Length | 2.082 INCHES MINIMUM AND 2.092 INCHES MAXIMUM IN |
| Distance From Centerline to Flat | 0.149 INCHES MAXIMUM IN |
| Thread Pitch in Millimeters | 25.4 |
| Thread Length | 0.428 INCHES MINIMUM AND 0.438 INCHES MAXIMUM IN |
| Material Document and Classification | AISI ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| First Diameter From Head | 0.234 INCHES MINIMUM AND 0.238 INCHES MAXIMUM IN |
| Distance From Largest Bearing Surface of Head to End of Second Diameter | 0.504 INCHES MINIMUM AND 0.520 INCHES MAXIMUM IN |
| Nominal Thread Diameter | 6.0 MILLIMETERS MM |
| Distance From Largest Bearing Surface of Head to End of Third Diameter | 0.543 INCHES MINIMUM AND 0.559 INCHES MAXIMUM IN |
| Head Style | DEE CHAMFER |
| Thread Direction | RIGHT-HAND |
| Second Diameter From Head | 0.193 INCHES MINIMUM AND 0.201 INCHES MAXIMUM IN |
| Distance From Largest Bearing Surface of Head to End of First Diameter | 0.138 INCHES MINIMUM AND 0.178 INCHES MAXIMUM IN |
| Nonstandard Thread Pitch Diameter | +0.2060 TO 0.2160 INCHES IN |
| Externally Relieved Body Diameter Quantity | 1 |
| Internal Drive Style | CROSS RECESS TYPE 1 |
| Material | STEEL COMP E9310 OVERALL |
| Distance From Largest Bearing Surface of Head to End of Fourth Diameter | 0.583 INCHES MINIMUM AND 0.599 INCHES MAXIMUM IN |
| Third Diameter From Head | 0.235 INCHES MINIMUM AND 0.236 INCHES MAXIMUM IN |
| Head Diameter | 0.393 INCHES MAXIMUM 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 |
|---|---|
| 394997 | 3/9 Design control — primary reference Brooks Automation, Inc. Div Cti Cryogenics |
| B2-2940 | 5/9 Secondary reference Brooks Automation, Inc. Div Cti Cryogenics |
NSN 5305-00-778-7828 is a Screw,externally Relieved Body, classified under FSC 5305, Screws. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 3930-00-933-3763. Verify interchangeability with system specifications before substitution.
Key specifications for 5305-00-778-7828: Fourth Diameter From Head: 0.173 INCHES MINIMUM AND 0.181 INCHES MAXIMUM IN; Head Height: 0.205 INCHES MAXIMUM IN; Fastener Length: 2.082 INCHES MINIMUM AND 2.092 INCHES MAXIMUM IN; Distance From Centerline to Flat: 0.149 INCHES MAXIMUM IN. 22 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.