The Screw,machine, cataloged under National Stock Number 5305-00-403-0163, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5305-00-403-0163 |
| Primary Part Number | 616312 |
| Item Name | Screw,machine |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney |
| Status | ACTIVE |
| Head Height | 0.209 INCHES MINIMUM AND 0.229 INCHES MAXIMUM IN |
| Screw Surface Treatment | CADMIUM |
| Fastener Length | 0.428 INCHES MINIMUM AND 0.448 INCHES MAXIMUM IN |
| Screw Material Document and Classification | AMS6322 ASSN STD SINGLE MATERIAL RESPONSE |
| Thread Length | 0.386 INCHES MINIMUM AND 0.448 INCHES MAXIMUM IN |
| Hardness Rating | 26.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM |
| Nominal Thread Diameter | 0.190 INCHES IN |
| Head Style | FLAT CHAMFER |
| Thread Direction | RIGHT-HAND |
| Screw Material | STEEL |
| Minimum Tensile Strength | 125000 POUNDS PER SQUARE INCH LBS |
| Internal Drive Style | SLOT |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 32 |
| Hole Quantity | 2 |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Head Hole Configuration Style | ROUND |
| Hole Diameter | 0.032 INCHES NOMINAL IN |
| Head Diameter | 0.292 INCHES MINIMUM AND 0.313 INCHES MAXIMUM IN |
| Screw Surface Treatment Document and Classification | AMS 2400 ASSN STD SINGLE TREATMENT RESPONSE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
NSN 5305-00-403-0163 is a Screw,machine, manufactured by Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney, classified under FSC 5305, Screws. Status: active.
NSN 5305-00-403-0163 has 2 manufacturer part numbers on file: 616312 (Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney), 616312 (Necchi Spa).
1 possible match (shared part number, not a government interchangeability claim): 5120-01-066-5621. Verify interchangeability with system specifications before substitution.
Key specifications for 616312: Head Height: 0.209 INCHES MINIMUM AND 0.229 INCHES MAXIMUM IN; Screw Surface Treatment: CADMIUM; Fastener Length: 0.428 INCHES MINIMUM AND 0.448 INCHES MAXIMUM IN; Screw Material Document and Classification: AMS6322 ASSN STD SINGLE MATERIAL RESPONSE. 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.