The Screw,close Tolerance, cataloged under National Stock Number 5305-01-191-4594, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is West Coast Aerospace, Inc.. Government technical data includes 17 specifications, cited from the U.S. Government catalog. The record lists 8 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 12 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-191-4594 |
| Primary Part Number | WC4068-5-15 |
| Item Name | Screw,close Tolerance |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | West Coast Aerospace, Inc. |
| Status | ACTIVE |
| Fastener Length | 1.454 INCHES MINIMUM AND 1.484 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | MIL-C-83488,TYPE 2,CLASS 3 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 0.506 INCHES MINIMUM AND 0.556 INCHES MAXIMUM IN |
| Material Document and Classification | AMS5629 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.312 INCHES IN |
| Head Style | FLAT COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Grip Length | 0.928 INCHES MINIMUM AND 0.948 INCHES MAXIMUM IN |
| Grip Diameter | 0.3110 INCHES MINIMUM AND 0.3120 INCHES MAXIMUM IN |
| Surface Treatment | ALUMINUM AND CHROMATE OVERALL |
| Internal Drive Style | HIGH-TORQUE |
| Countersink Angle | 101.0 DEGREES NOMINAL |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 24 |
| Material | STEEL COMP XM-13 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Head Diameter | 0.429 INCHES MINIMUM AND 0.477 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 |
|---|---|
| WC4068-5-15 PRIMARY | West Coast Aerospace, Inc. (USA) |
| HT4068-5-15A PRIMARY | Howmet Global Fastening Systems Inc (USA) |
| HT4068-5-15A PRIMARY | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| 11883-5-15/11883-5L15 | Reid Products Inc. Dba Reid Products Inc (USA) |
| HT4068-5-15A PRIMARY | Hi-Shear Corporation (USA) |
| HT4068-5-15A | Sps Technologies Ltd, Tj Brooks Division (GBR) |
| HT4068-5-15A PRIMARY | Fastener Innovation Technology, Inc. Dba F I T (USA) |
| HT4068-5-15A PRIMARY | Sps Technologies, Llc Dba PB Fasteners (USA) |
| Reference | Meaning |
|---|---|
| HT4068-5-15A | C/1 Advisory reference — outside the item-of-supply concept Huck International, Inc |
| 3M926-5-15 | 5/9 Secondary reference The Boeing Company Div Defense |
| HT4068-5-15A | 5/9 Secondary reference U.S. Government activity |
| HT4068-5-15A | 3/2 Design control — primary reference U.S. Government activity |
| HT4068-5-15 | 5/9 Secondary reference Hi-Shear Corporation |
| HT4068-5-15 | 5/9 Secondary reference U.S. Government activity |
| HT4068-5-15 | 5/9 Secondary reference U.S. Government activity |
| HT068-5-15A | C/1 Advisory reference — outside the item-of-supply concept Hi-Shear Corporation |
| HT4068-5-15A | 3/2 Design control — primary reference U.S. Government activity |
| 3M926-5L15 | 7/2 Vendor item drawing reference The Boeing Company Div Defense |
| HT4068-5-15 | 5/9 Secondary reference Sps Technologies, Llc Dba PB Fasteners |
| HT4068-5-15 | 5/9 Secondary reference U.S. Government activity |
NSN 5305-01-191-4594 is a Screw,close Tolerance, manufactured by West Coast Aerospace, Inc., classified under FSC 5305, Screws. Status: active.
NSN 5305-01-191-4594 has 8 manufacturer part numbers on file: WC4068-5-15 (West Coast Aerospace, Inc.), HT4068-5-15A (Howmet Global Fastening Systems Inc), HT4068-5-15A (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc), 11883-5-15/11883-5L15 (Reid Products Inc. Dba Reid Products Inc), HT4068-5-15A (Hi-Shear Corporation) and 3 more.
Key specifications for WC4068-5-15: Fastener Length: 1.454 INCHES MINIMUM AND 1.484 INCHES MAXIMUM IN; Surface Treatment Document and Classification: MIL-C-83488,TYPE 2,CLASS 3 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL; Thread Length: 0.506 INCHES MINIMUM AND 0.556 INCHES MAXIMUM IN; Material Document and Classification: AMS5629 ASSN STD SINGLE MATERIAL RESPONSE OVERALL. 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.