The Screw,machine, cataloged under National Stock Number 5305-00-993-0496, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Ontic Engineering & Manufacturing, Inc Dba Ontic Us. Government technical data includes 14 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through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-00-993-0496 |
| Primary Part Number | 480172 |
| Item Name | Screw,machine |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Ontic Engineering & Manufacturing, Inc Dba Ontic Us |
| Status | ACTIVE |
| Head Height | 0.180 INCHES NOMINAL IN |
| Screw Surface Treatment | SILVER |
| Fastener Length | 2.200 INCHES NOMINAL IN |
| Thread Length | 1.500 INCHES MINIMUM IN |
| Criticality Code Justification | CYAU |
| Nominal Thread Diameter | 0.190 INCHES IN |
| Head Style | FILLISTER |
| Thread Direction | RIGHT-HAND |
| Screw Material | STEEL CORROSION RESISTING |
| Internal Drive Style | CROSS RECESS TYPE 1 |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 24 |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Head Diameter | 0.312 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 | Y |
| Part Number | Manufacturer |
|---|---|
| 480172 | Ontic Engineering & Manufacturing, Inc Dba Ontic Us (USA) |
| 1433-613551 | Ontic Engineering & Manufacturing, Inc Dba Ontic Us (USA) |
| Reference | Meaning |
|---|---|
| 1433-613551 | 5/9 Secondary reference Parker-Hannifin Corporation Div Gas Turbine Fuel Systems |
| 480172 | 5/9 Secondary reference Parker-Hannifin Corporation Div Gas Turbine Fuel Systems |
| 480172 | 5/2 Secondary reference U.S. Government activity |
| 480172 | 3/9 Design control — primary reference Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney |
| 480172 | 5/9 Secondary reference Turbo Power & Marine System Inc Sub of United Technologies Corp |
NSN 5305-00-993-0496 is a Screw,machine, manufactured by Ontic Engineering & Manufacturing, Inc Dba Ontic Us, classified under FSC 5305, Screws. Status: active.
NSN 5305-00-993-0496 has 2 manufacturer part numbers on file: 480172 (Ontic Engineering & Manufacturing, Inc Dba Ontic Us), 1433-613551 (Ontic Engineering & Manufacturing, Inc Dba Ontic Us).
Key specifications for 480172: Head Height: 0.180 INCHES NOMINAL IN; Screw Surface Treatment: SILVER; Fastener Length: 2.200 INCHES NOMINAL IN; Thread Length: 1.500 INCHES MINIMUM IN. 14 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.