The Screw,close Tolerance, cataloged under National Stock Number 5305-01-147-4040, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc. Government technical data includes 19 specifications, cited from the U.S. Government catalog. The record lists 14 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-147-4040 |
| Primary Part Number | HT4049-4-7 |
| Item Name | Screw,close Tolerance |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc |
| Status | ACTIVE |
| Surface Finish | 32.0 MICROINCHES THREADS |
| Surface Finish | 32.0 MICROINCHES GRIP |
| Fastener Length | 0.739 INCHES MINIMUM AND 0.769 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 0.291 INCHES MINIMUM AND 0.341 INCHES MAXIMUM IN |
| Material Document and Classification | AMS 5629 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Head Style | FLAT COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Grip Length | 0.428 INCHES MINIMUM AND 0.448 INCHES MAXIMUM IN |
| Grip Diameter | 0.2490 INCHES MINIMUM AND 0.2495 INCHES MAXIMUM IN |
| Surface Treatment | PASSIVATE OVERALL |
| Internal Drive Style | HIGH-TORQUE |
| Countersink Angle | 99.0 DEGREES MINIMUM AND 101.0 DEGREES MAXIMUM |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 28 |
| Material | STEEL COMP XM-13 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Head Diameter | 0.497 INCHES MINIMUM AND 0.507 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 |
|---|---|
| ST3M714-4-7 | Heartland Precision Fasteners Inc (USA) |
| ST3M714-4-7 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| WC4049-4-7 | West Coast Aerospace, Inc. (USA) |
| HT4049-4-7 | Huck International, Inc (USA) |
| ST3M714-4-7 | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| ST3M714-4-7 | Fastener Innovation Technology, Inc. Dba F I T (USA) |
| HT4049-4-7 PRIMARY | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| ST3M714-4-7 | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| ST3M714-4-7 | Reid Products Inc. Dba Reid Products Inc (USA) |
| ST3M714-4-7 | Houston Precision Fasteners I Lp (USA) |
| ST3M714-4-7 | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| ST3M714-4-7 | Sps Technologies Ltd, Tj Brooks Division (GBR) |
| HT4049-4-7 PRIMARY | Hi-Shear Corporation (USA) |
| HT4049-4-7 | Howmet Global Fastening Systems Inc (USA) |
| Reference | Meaning |
|---|---|
| ST3M714-4-7 | 5/2 Secondary reference U.S. Government activity |
| 10115442 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
| HT4049-4-7 | 5/9 Secondary reference U.S. Government activity |
| ST3M714-4-7 | 7/2 Vendor item drawing reference The Boeing Company Div Defense |
| HT4049-4-7 | 5/9 Secondary reference U.S. Government activity |
| HT4049-4-7 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5305-01-147-4040 is a Screw,close Tolerance, manufactured by Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-147-4040 has 14 manufacturer part numbers on file: ST3M714-4-7 (Heartland Precision Fasteners Inc), ST3M714-4-7 (Sps Technologies, Llc Dba PB Fasteners), WC4049-4-7 (West Coast Aerospace, Inc.), HT4049-4-7 (Huck International, Inc), ST3M714-4-7 (Valley-Todeco, Inc. Dba Arconic Fastening Systems) and 9 more.
Key specifications for HT4049-4-7: Surface Finish: 32.0 MICROINCHES THREADS; Surface Finish: 32.0 MICROINCHES GRIP; Fastener Length: 0.739 INCHES MINIMUM AND 0.769 INCHES MAXIMUM IN; Surface Treatment Document and Classification: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL. 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.