The Screw,close Tolerance, cataloged under National Stock Number 5305-01-435-9819, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Huck International, Inc. Government technical data includes 19 specifications, cited from the U.S. Government catalog. The record lists 6 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-435-9819 |
| Primary Part Number | BACB30LU5P11Y |
| Item Name | Screw,close Tolerance |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Huck International, Inc |
| Status | ACTIVE |
| Fastener Length | 1.1415 INCHES MINIMUM AND 1.1715 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | QQ-P-416, TYPE 2 CLASS 2 FED SPEC SINGLE TREATMENT RESPONSE FASTENER |
| Thread Length | 0.469 INCHES NOMINAL IN |
| Material Document and Classification | MIL-S-5000 MIL SPEC 1ST MATERIAL RESPONSE OR MIL-S-6049 MIL SPEC 2ND MATERIAL RESPONSE OR AMS 6322 ASSN STD 2ND MATERIAL RESPONSE FASTENER |
| Nominal Thread Diameter | 0.3125 INCHES IN |
| Head Style | FLAT COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Grip Length | 0.6775 INCHES MINIMUM AND 0.6975 INCHES MAXIMUM IN |
| Grip Diameter | 0.3422 INCHES MINIMUM AND 0.3432 INCHES MAXIMUM IN |
| Locking Feature | PATCH THREADS |
| Surface Treatment | CADMIUM AND CHROMATE FASTENER |
| Internal Drive Style | CROSS RECESS TYPE 1 |
| Countersink Angle | 99.0 DEGREES MINIMUM AND 101.0 DEGREES MAXIMUM |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 24 |
| Material | PLASTIC POLYAMIDE NYLON LOCKING FEATURE |
| Material | STEEL COMP E4340 OR STEEL COMP 8740 FASTENER |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Head Diameter | 0.574 INCHES MINIMUM AND 0.637 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 |
|---|---|
| BACB30LU5P11Y PRIMARY | Huck International, Inc (USA) |
| BACB30LU5P11Y | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| BACB30LU5P11Y | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| BACB30LU5P11Y | Federal Manufacturing Corp (USA) |
| BACB30LU5P11Y | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| BACB30LU5P11Y | Howmet Global Fastening Systems Inc (USA) |
| Reference | Meaning |
|---|---|
| BACB30LU5P11Y | 5/2 Secondary reference U.S. Government activity |
| BACB30LU5P11Y | 5/9 Secondary reference U.S. Government activity |
| BACB30LU5P11Y | 5/2 Secondary reference U.S. Government activity |
NSN 5305-01-435-9819 is a Screw,close Tolerance, manufactured by Huck International, Inc, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-435-9819 has 6 manufacturer part numbers on file: BACB30LU5P11Y (Huck International, Inc), BACB30LU5P11Y (Sps Technologies Llc Dba PB Fasteners Div PB Fasteners), BACB30LU5P11Y (Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company), BACB30LU5P11Y (Federal Manufacturing Corp), BACB30LU5P11Y (Valley-Todeco, Inc. Dba Arconic Fastening Systems) and 1 more.
Key specifications for BACB30LU5P11Y: Fastener Length: 1.1415 INCHES MINIMUM AND 1.1715 INCHES MAXIMUM IN; Surface Treatment Document and Classification: QQ-P-416, TYPE 2 CLASS 2 FED SPEC SINGLE TREATMENT RESPONSE FASTENER; Thread Length: 0.469 INCHES NOMINAL IN; Material Document and Classification: MIL-S-5000 MIL SPEC 1ST MATERIAL RESPONSE OR MIL-S-6049 MIL SPEC 2ND MATERIAL RESPONSE OR AMS 6322 ASSN STD 2ND MATERIAL RESPONSE FASTENER. 19 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.