The Screw,close Tolerance, cataloged under National Stock Number 5305-01-034-6626, 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 18 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through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-034-6626 |
| Primary Part Number | HT4048-7D-15 |
| Item Name | Screw,close Tolerance |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Howmet Global Fastening Systems Inc |
| Status | ACTIVE |
| Fastener Length | 1.376 INCHES MINIMUM AND 1.406 INCHES MAXIMUM IN |
| Thread Length | 0.428 INCHES MINIMUM AND 0.478 INCHES MAXIMUM IN |
| Shank Unthreaded Hole Diameter | 0.106 INCHES MINIMUM AND 0.111 INCHES MAXIMUM FIRST HOLE IN |
| Material Document and Classification | 23-112,MCDONNEL DOUGLAS CORP MFR REF SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.438 INCHES IN |
| Head Style | FLAT COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Grip Length | 0.928 INCHES MINIMUM AND 0.948 INCHES MAXIMUM IN |
| Grip Diameter | 0.4365 INCHES MINIMUM AND 0.4370 INCHES MAXIMUM IN |
| Surface Treatment | PASSIVATE OVERALL |
| Internal Drive Style | HIGH-TORQUE |
| Countersink Angle | 100.0 DEGREES NOMINAL |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 20 |
| Material | STEEL OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Distance From Head Largest Bearing Surface to Shank Hole Center | 0.120 INCHES MINIMUM AND 0.130 INCHES MAXIMUM FIRST HOLE IN |
| Head Diameter | 0.612 INCHES MINIMUM AND 0.672 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 |
|---|---|
| HT4048-7D-15 PRIMARY | Howmet Global Fastening Systems Inc (USA) |
| HT4048-7D-15 PRIMARY | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| HT4048-7D-15 PRIMARY | Hi-Shear Corporation (USA) |
| AT4048-7D-15 PRIMARY | Huck International, Inc (USA) |
| 11929-7D15 | Reid Products Inc. Dba Reid Products Inc (USA) |
| HT4048-7D-15 PRIMARY | Houston Precision Fasteners I Lp (USA) |
| Reference | Meaning |
|---|---|
| AT4048-7D-15 | 5/9 Secondary reference U.S. Government activity |
| ST3M713-7D15 | 7/2 Vendor item drawing reference The Boeing Company Div Defense |
| HT4048-7D-15 | 5/9 Secondary reference Sps Technologies, Llc Dba PB Fasteners |
| HT4048-7D-15 | 5/9 Secondary reference U.S. Government activity |
| HT4048-7D-15 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5305-01-034-6626 is a Screw,close Tolerance, manufactured by Howmet Global Fastening Systems Inc, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-034-6626 has 6 manufacturer part numbers on file: HT4048-7D-15 (Howmet Global Fastening Systems Inc), HT4048-7D-15 (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc), HT4048-7D-15 (Hi-Shear Corporation), AT4048-7D-15 (Huck International, Inc), 11929-7D15 (Reid Products Inc. Dba Reid Products Inc) and 1 more.
Key specifications for HT4048-7D-15: Fastener Length: 1.376 INCHES MINIMUM AND 1.406 INCHES MAXIMUM IN; Thread Length: 0.428 INCHES MINIMUM AND 0.478 INCHES MAXIMUM IN; Shank Unthreaded Hole Diameter: 0.106 INCHES MINIMUM AND 0.111 INCHES MAXIMUM FIRST HOLE IN; Material Document and Classification: 23-112,MCDONNEL DOUGLAS CORP MFR REF SINGLE MATERIAL RESPONSE OVERALL. 18 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.