The Screw,close Tolerance, cataloged under National Stock Number 5305-01-526-4053, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Reid Products Inc. Dba Reid Products 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5305-01-526-4053 |
| Primary Part Number | 11839C4-11-51 |
| Item Name | Screw,close Tolerance |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Reid Products Inc. Dba Reid Products Inc |
| Status | ACTIVE |
| Fastener Length | 1.157 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 | 0.688 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 |
|---|---|
| WC4075C4-11-51 | West Coast Aerospace, Inc. (USA) |
| 11839C4-11-51 PRIMARY | Reid Products Inc. Dba Reid Products Inc (USA) |
| HT4075D4-11-51 PRIMARY | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| HT4075D4-11-51 PRIMARY | Howmet Global Fastening Systems Inc (USA) |
| HT4075D4-11-51 PRIMARY | Huck International, Inc (USA) |
| 3M1034C4-11-51 PRIMARY | Heartland Precision Fasteners Inc (USA) |
| 3M1034C4-11-51 PRIMARY | The Boeing Company Div Defense (USA) |
| HT4075D4-11-51 PRIMARY | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| 3M1034C4-11-51 | Houston Precision Fasteners I Lp (USA) |
| HT4075D4-11-51 PRIMARY | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| 3M1034C4-11-51 PRIMARY | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| 3M1034C4-11-51 PRIMARY | Fastener Innovation Technology, Inc. Dba F I T (USA) |
| HT4075D4-11-51 PRIMARY | Sps Technologies, Llc Dba PB Fasteners (USA) |
| HT4075D4-11-51 PRIMARY | Hi-Shear Corporation (USA) |
| Reference | Meaning |
|---|---|
| HT4075D4-11-51 | 3/2 Design control — primary reference U.S. Government activity |
| HT4075D4-11-51 | 3/2 Design control — primary reference U.S. Government activity |
| HT4075D4-11-51 | 5/9 Secondary reference Sps Technologies Inc |
NSN 5305-01-526-4053 is a Screw,close Tolerance, manufactured by Reid Products Inc. Dba Reid Products Inc, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-526-4053 has 14 manufacturer part numbers on file: WC4075C4-11-51 (West Coast Aerospace, Inc.), 11839C4-11-51 (Reid Products Inc. Dba Reid Products Inc), HT4075D4-11-51 (Sps Technologies Llc Dba PB Fasteners Div PB Fasteners), HT4075D4-11-51 (Howmet Global Fastening Systems Inc), HT4075D4-11-51 (Huck International, Inc) and 9 more.
Key specifications for 11839C4-11-51: Fastener Length: 1.157 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.