The Screw,machine, cataloged under National Stock Number 5305-00-451-1936, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Pattonair Usa Inc Dba Incora Div Uniseal Division. Government technical data includes 17 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-00-451-1936 |
| Primary Part Number | ABS20642-4F9 |
| Item Name | Screw,machine |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Pattonair Usa Inc Dba Incora Div Uniseal Division |
| Status | ACTIVE |
| Head Height | 0.097 INCHES NOMINAL IN |
| Screw Surface Treatment | CADMIUM AND CHROMATE |
| Fastener Length | 0.863 INCHES MINIMUM AND 0.893 INCHES MAXIMUM IN |
| Screw Material Document and Classification | QQ-S-624 FED SPEC SINGLE MATERIAL RESPONSE |
| Thread Length | 0.291 INCHES MINIMUM AND 0.341 INCHES MAXIMUM IN |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Head Style | FLAT COUNTERSUNK UNDERCUT |
| Thread Direction | RIGHT-HAND |
| Screw Material | STEEL COMP 4037 |
| Minimum Tensile Strength | 160000 POUNDS PER SQUARE INCH LBS |
| Internal Drive Style | TORQUE SET |
| Countersink Angle | 99.0 DEGREES MINIMUM AND 101.0 DEGREES MAXIMUM |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 28 |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Head Diameter | 0.600 INCHES MINIMUM AND 0.666 INCHES MAXIMUM IN |
| Screw Surface Treatment Document and Classification | QQ-P-416 TY 2 CL 3 FED SPEC ALL TREATMENT RESPONSES |
| 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 |
|---|---|
| ABS20642-4F9 | Abscoa Industries Inc (USA) |
| ABS20642-4F9 PRIMARY | Pattonair Usa Inc Dba Incora Div Uniseal Division (USA) |
| Reference | Meaning |
|---|---|
| STSBA001F08P09 | 7/2 Vendor item drawing reference U.S. Government activity |
NSN 5305-00-451-1936 is a Screw,machine, manufactured by Pattonair Usa Inc Dba Incora Div Uniseal Division, classified under FSC 5305, Screws. Status: active.
NSN 5305-00-451-1936 has 2 manufacturer part numbers on file: ABS20642-4F9 (Abscoa Industries Inc), ABS20642-4F9 (Pattonair Usa Inc Dba Incora Div Uniseal Division).
Key specifications for ABS20642-4F9: Head Height: 0.097 INCHES NOMINAL IN; Screw Surface Treatment: CADMIUM AND CHROMATE; Fastener Length: 0.863 INCHES MINIMUM AND 0.893 INCHES MAXIMUM IN; Screw Material Document and Classification: QQ-S-624 FED SPEC SINGLE MATERIAL RESPONSE. 17 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.