The Screw,close Tolerance, cataloged under National Stock Number 5305-01-025-5776, 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through both NSN and commercial part number lookups. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-025-5776 |
| Primary Part Number | HT4049-5D16 |
| Item Name | Screw,close Tolerance |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Howmet Global Fastening Systems Inc |
| Status | ACTIVE |
| Fastener Length | 1.360 INCHES MINIMUM AND 1.390 INCHES MAXIMUM IN |
| Thread Length | 0.350 INCHES MINIMUM AND 0.400 INCHES MAXIMUM IN |
| Shank Unthreaded Hole Diameter | 0.076 INCHES MINIMUM AND 0.081 INCHES MAXIMUM FIRST HOLE IN |
| Material Document and Classification | AMS 5629 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.312 INCHES IN |
| Head Style | FLAT COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Grip Length | 0.990 INCHES MINIMUM AND 1.010 INCHES MAXIMUM IN |
| Grip Diameter | 0.3115 INCHES MINIMUM AND 0.3120 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 | 24 |
| Material | STEEL COMP XM-13 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Distance From Head Largest Bearing Surface to Shank Hole Center | 1.237 INCHES MINIMUM AND 1.277 INCHES MAXIMUM FIRST HOLE IN |
| Head Diameter | 0.625 INCHES MINIMUM AND 0.635 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 |
|---|---|
| HT4049-5D16 | Huck International, Inc (USA) |
| HT4049-5D16 PRIMARY | Howmet Global Fastening Systems Inc (USA) |
| HT4049-5D16 PRIMARY | Hi-Shear Corporation (USA) |
| HT4049-5D16 PRIMARY | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| WC4049-5D16 PRIMARY | West Coast Aerospace, Inc. (USA) |
| ST3M714-5D16 PRIMARY | Fastener Innovation Technology, Inc. Dba F I T (USA) |
| Reference | Meaning |
|---|---|
| HT4049-5D16 | 3/2 Design control — primary reference U.S. Government activity |
| HT4049-5D16 | 5/9 Secondary reference U.S. Government activity |
| ST3M714-6D59 | 5/9 Secondary reference The Boeing Company Div Defense |
| ST3M714-5D16 | 7/2 Vendor item drawing reference The Boeing Company Div Defense |
| HT4049-5D16 | 5/9 Secondary reference Sps Technologies, Llc Dba PB Fasteners |
| HT4049-5D16 | 5/9 Secondary reference U.S. Government activity |
NSN 5305-01-025-5776 is a Screw,close Tolerance, manufactured by Howmet Global Fastening Systems Inc, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-025-5776 has 6 manufacturer part numbers on file: HT4049-5D16 (Huck International, Inc), HT4049-5D16 (Howmet Global Fastening Systems Inc), HT4049-5D16 (Hi-Shear Corporation), HT4049-5D16 (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc), WC4049-5D16 (West Coast Aerospace, Inc.) and 1 more.
Key specifications for HT4049-5D16: Fastener Length: 1.360 INCHES MINIMUM AND 1.390 INCHES MAXIMUM IN; Thread Length: 0.350 INCHES MINIMUM AND 0.400 INCHES MAXIMUM IN; Shank Unthreaded Hole Diameter: 0.076 INCHES MINIMUM AND 0.081 INCHES MAXIMUM FIRST HOLE IN; Material Document and Classification: AMS 5629 ASSN STD 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.