The Screw,close Tolerance, cataloged under National Stock Number 5305-01-526-4050, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Howmet Global Fastening Systems Inc. Government technical data includes 17 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-526-4050 |
| Primary Part Number | HT4075D4-9-36 |
| Item Name | Screw,close Tolerance |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Howmet Global Fastening Systems Inc |
| Status | ACTIVE |
| Fastener Length | 1.031 INCHES NOMINAL IN |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 0.469 INCHES NOMINAL 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 | 0.562 INCHES NOMINAL IN |
| Grip Diameter | 0.249 INCHES NOMINAL IN |
| Surface Treatment | PASSIVATE OVERALL |
| Internal Drive Style | HIGH-TORQUE |
| Countersink Angle | 100.0 DEGREES NOMINAL |
| 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 |
|---|---|
| HT4075D4-9-36 PRIMARY | Howmet Global Fastening Systems Inc (USA) |
| HT4075D4-9-36 PRIMARY | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| HT4075D4-9-36 PRIMARY | Hi-Shear Corporation (USA) |
| 3M1034C4-9-36 PRIMARY | Heartland Precision Fasteners Inc (USA) |
| 3M1034C4-9-36 | Houston Precision Fasteners I Lp (USA) |
| HT4075D4-9-36 PRIMARY | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| HT4075D4-9-36 PRIMARY | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| HT4075D4-9-36 PRIMARY | Sps Technologies, Llc Dba PB Fasteners (USA) |
| HT4075D4-9-36 PRIMARY | Huck International, Inc (USA) |
| 11839C4-9-36 PRIMARY | Reid Products Inc. Dba Reid Products Inc (USA) |
| 3M1034C4-9-36 PRIMARY | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| 3M1034C4-9-36 PRIMARY | Fastener Innovation Technology, Inc. Dba F I T (USA) |
| 3M1034C4-9-36 PRIMARY | The Boeing Company Div Defense (USA) |
| WC4075C4-9-36 | West Coast Aerospace, Inc. (USA) |
| Reference | Meaning |
|---|---|
| HT4075D4-9-36 | 3/2 Design control — primary reference U.S. Government activity |
| HT4075D4-9-36 | 3/2 Design control — primary reference U.S. Government activity |
| HT4075D4-9-36 | 5/9 Secondary reference Sps Technologies Inc |
NSN 5305-01-526-4050 is a Screw,close Tolerance, manufactured by Howmet Global Fastening Systems Inc, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-526-4050 has 14 manufacturer part numbers on file: HT4075D4-9-36 (Howmet Global Fastening Systems Inc), HT4075D4-9-36 (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc), HT4075D4-9-36 (Hi-Shear Corporation), 3M1034C4-9-36 (Heartland Precision Fasteners Inc), 3M1034C4-9-36 (Houston Precision Fasteners I Lp) and 9 more.
Key specifications for HT4075D4-9-36: Fastener Length: 1.031 INCHES NOMINAL IN; Surface Treatment Document and Classification: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL; Thread Length: 0.469 INCHES NOMINAL IN; Material Document and Classification: AMS 5629 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.