The Screw,tapping, cataloged under National Stock Number 5305-01-628-8295, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Devcom Chemical Biological Center Dba Chemical Biological Center Div U.s. Dept of Army. Government technical data includes 8 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-628-8295 |
| Primary Part Number | 11B4550025 |
| Item Name | Screw,tapping |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Devcom Chemical Biological Center Dba Chemical Biological Center Div U.s. Dept of Army |
| Status | ACTIVE |
| Nonmachine Nominal Thread Diameter | 0.250 INCHES IN |
| Head Height | 0.240 INCHES NOMINAL IN |
| Fastener Length | 1.500 INCHES NOMINAL IN |
| Extended Washer Diameter | 0.520 INCHES NOMINAL IN |
| Head Style | HEXAGON EXTENDED WASHER |
| Width Between Flats | 0.375 INCHES NOMINAL IN |
| Internal Drive Style | W/O INTERNAL DRIVE |
| Material | STEEL COMP 410 OVERALL |
| 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 |
|---|---|
| 90822A630 | Mcmaster-Carr Supply Co (USA) |
| 11B4550025 PRIMARY | Devcom Chemical Biological Center Dba Chemical Biological Center Div U.s. Dept of Army (USA) |
NSN 5305-01-628-8295 is a Screw,tapping, manufactured by Devcom Chemical Biological Center Dba Chemical Biological Center Div U.s. Dept of Army, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-628-8295 has 2 manufacturer part numbers on file: 90822A630 (Mcmaster-Carr Supply Co), 11B4550025 (Devcom Chemical Biological Center Dba Chemical Biological Center Div U.s. Dept of Army).
Key specifications for 11B4550025: Nonmachine Nominal Thread Diameter: 0.250 INCHES IN; Head Height: 0.240 INCHES NOMINAL IN; Fastener Length: 1.500 INCHES NOMINAL IN; Extended Washer Diameter: 0.520 INCHES NOMINAL IN. 8 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.