The Screw,close Tolerance, cataloged under National Stock Number 5305-01-520-4446, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company. Government technical data includes 16 specifications, cited from the U.S. Government catalog. The record lists 5 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5305-01-520-4446 |
| Primary Part Number | AIC618-5-20 |
| Item Name | Screw,close Tolerance |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company |
| Status | ACTIVE |
| Fastener Length | 1.235 INCHES MINIMUM AND 1.265 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | NAS672 ASSN STD SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 0.476 INCHES MINIMUM AND 0.526 INCHES MAXIMUM IN |
| Material Document and Classification | CDA000 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.312 INCHES IN |
| Head Style | FLAT COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Grip Length | 0.734 INCHES MINIMUM AND 0.764 INCHES MAXIMUM IN |
| Grip Diameter | 0.311 INCHES MINIMUM AND 0.312 INCHES MAXIMUM IN |
| Internal Drive Style | OFFSET CRUCIFORM (TORQUE SET) |
| Countersink Angle | 90.0 DEGREES NOMINAL |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 24 |
| Material | STEEL COMP H11 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Head Diameter | 0.429 INCHES MINIMUM AND 0.479 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 |
|---|---|
| GS1009-5-20 | B & B Specialties Inc Dba Gs Aerospace Div Gs Aerospace (USA) |
| AIC618-5-20 PRIMARY | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| 93926-5-20 PRIMARY | Sps Technologies, Llc Dba PB Fasteners (USA) |
| VT10021-5-20 | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| SF116-5-20 | Jensen Rolf and Associates (USA) |
| Reference | Meaning |
|---|---|
| C20645-5-20 | 7/2 Vendor item drawing reference U.S. Government activity |
| 93926-5-20 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5305-01-520-4446 is a Screw,close Tolerance, manufactured by Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-520-4446 has 5 manufacturer part numbers on file: GS1009-5-20 (B & B Specialties Inc Dba Gs Aerospace Div Gs Aerospace), AIC618-5-20 (Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company), 93926-5-20 (Sps Technologies, Llc Dba PB Fasteners), VT10021-5-20 (Valley-Todeco, Inc. Dba Arconic Fastening Systems), SF116-5-20 (Jensen Rolf and Associates).
Key specifications for AIC618-5-20: Fastener Length: 1.235 INCHES MINIMUM AND 1.265 INCHES MAXIMUM IN; Surface Treatment Document and Classification: NAS672 ASSN STD SINGLE TREATMENT RESPONSE OVERALL; Thread Length: 0.476 INCHES MINIMUM AND 0.526 INCHES MAXIMUM IN; Material Document and Classification: CDA000 ASSN STD SINGLE MATERIAL RESPONSE OVERALL. 16 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.