The Screw,externally Relieved Body, cataloged under National Stock Number 5305-01-055-6524, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Huck International, Inc. Div Huck Products Division. Government technical data includes 20 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-055-6524 |
| Primary Part Number | DIA7900-6-A-2 |
| Item Name | Screw,externally Relieved Body |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Huck International, Inc. Div Huck Products Division |
| Status | ACTIVE |
| Head Height | 0.067 INCHES MINIMUM AND 0.097 INCHES MAXIMUM IN |
| Fastener Length | 0.427 INCHES MINIMUM AND 0.447 INCHES MAXIMUM IN |
| Thread Length | 0.165 INCHES MINIMUM AND 0.195 INCHES MAXIMUM IN |
| First Diameter From Head | 0.250 INCHES MINIMUM AND 0.280 INCHES MAXIMUM IN |
| Distance From Largest Bearing Surface of Head to End of Second Diameter | 0.062 INCHES NOMINAL IN |
| Nominal Thread Diameter | 0.138 INCHES IN |
| Distance From Largest Bearing Surface of Head to End of Third Diameter | 0.262 INCHES NOMINAL IN |
| Head Style | FILLISTER |
| Thread Direction | RIGHT-HAND |
| Second Diameter From Head | 0.200 INCHES MINIMUM AND 0.205 INCHES MAXIMUM IN |
| Distance From Largest Bearing Surface of Head to End of First Diameter | 0.015 INCHES MINIMUM AND 0.025 INCHES MAXIMUM IN |
| Externally Relieved Body Diameter Quantity | 3 |
| Surface Treatment | CADMIUM OVERALL |
| Internal Drive Style | SLOT |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 32 |
| Material | STEEL COMP 4037 OVERALL |
| Third Diameter From Head | 0.138 INCHES NOMINAL IN |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Head Diameter | 0.250 INCHES MINIMUM AND 0.280 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 |
| Part Number | Manufacturer |
|---|---|
| DIA7900-6-A-2 PRIMARY | Huck International, Inc. Div Huck Products Division (USA) |
| 656-064-9001 PRIMARY | Fastener Innovation Technology, Inc. Dba F I T (USA) |
| Reference | Meaning |
|---|---|
| 656-064-9001 | 7/2 Vendor item drawing reference Honeywell International Inc. Div Aerospace - Torrance |
| DIA7900-6-A-2 | 5/9 Secondary reference U.S. Government activity |
NSN 5305-01-055-6524 is a Screw,externally Relieved Body, manufactured by Huck International, Inc. Div Huck Products Division, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-055-6524 has 2 manufacturer part numbers on file: DIA7900-6-A-2 (Huck International, Inc. Div Huck Products Division), 656-064-9001 (Fastener Innovation Technology, Inc. Dba F I T).
Key specifications for DIA7900-6-A-2: Head Height: 0.067 INCHES MINIMUM AND 0.097 INCHES MAXIMUM IN; Fastener Length: 0.427 INCHES MINIMUM AND 0.447 INCHES MAXIMUM IN; Thread Length: 0.165 INCHES MINIMUM AND 0.195 INCHES MAXIMUM IN; First Diameter From Head: 0.250 INCHES MINIMUM AND 0.280 INCHES MAXIMUM IN. 20 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.