The Screw,machine, cataloged under National Stock Number 5305-00-957-6563, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is The Boeing Company Div Defense. Government technical data includes 17 specifications, cited from the U.S. Government catalog. The record lists 4 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through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5305-00-957-6563 |
| Primary Part Number | 3M49-6-16 |
| Item Name | Screw,machine |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Head Height | 0.115 INCHES MINIMUM AND 0.117 INCHES MAXIMUM IN |
| Screw Surface Treatment | CADMIUM AND CHROMATE |
| Fastener Length | 1.625 INCHES MINIMUM AND 1.672 INCHES MAXIMUM IN |
| Screw Material Document and Classification | MIL-S-5626 MIL SPEC 1ST MATERIAL RESPONSE OR MIL-6758 MIL SPEC 2ND MATERIAL RESPONSE |
| Thread Length | 0.615 INCHES MINIMUM AND 0.682 INCHES MAXIMUM IN |
| Nominal Thread Diameter | 0.375 INCHES IN |
| Head Style | FLAT COUNTERSUNK UNDERCUT |
| Thread Direction | RIGHT-HAND |
| Screw Material | STEEL COMP 4140 OR STEEL COMP 4130 |
| Minimum Tensile Strength | 180000 POUNDS PER SQUARE INCH LBS |
| Internal Drive Style | HIGH-TORQUE |
| Countersink Angle | 100.0 DEGREES NOMINAL |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 24 |
| Thread Series Designator | UNF |
| Head Diameter | 0.755 INCHES MINIMUM AND 0.760 INCHES MAXIMUM IN |
| Screw Surface Treatment Document and Classification | QQ-P-416,TY 2,AAWUKN FED SPEC SINGLE TREATMENT RESPONSE |
| 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 |
|---|---|
| 3M49-6-16 | Hi-Shear Corporation (USA) |
| 3M49-6-16 | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| 3M49-6-16 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| 3M49-6-16 PRIMARY | The Boeing Company Div Defense (USA) |
| Reference | Meaning |
|---|---|
| HT403-6-16 | C/1 Advisory reference — outside the item-of-supply concept Howmet Global Fastening Systems Inc |
| HT403-6-16 | 5/9 Secondary reference U.S. Government activity |
| 3M49-6-16 | 5/2 Secondary reference U.S. Government activity |
| 54263-6-16 | 5/9 Secondary reference Sps Technologies, Llc Dba PB Fasteners |
| HT6U16 | 5/9 Secondary reference Hi-Shear Corporation |
NSN 5305-00-957-6563 is a Screw,machine, manufactured by The Boeing Company Div Defense, classified under FSC 5305, Screws. Status: active.
NSN 5305-00-957-6563 has 4 manufacturer part numbers on file: 3M49-6-16 (Hi-Shear Corporation), 3M49-6-16 (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc), 3M49-6-16 (Sps Technologies, Llc Dba PB Fasteners), 3M49-6-16 (The Boeing Company Div Defense).
Key specifications for 3M49-6-16: Head Height: 0.115 INCHES MINIMUM AND 0.117 INCHES MAXIMUM IN; Screw Surface Treatment: CADMIUM AND CHROMATE; Fastener Length: 1.625 INCHES MINIMUM AND 1.672 INCHES MAXIMUM IN; Screw Material Document and Classification: MIL-S-5626 MIL SPEC 1ST MATERIAL RESPONSE OR MIL-6758 MIL SPEC 2ND MATERIAL RESPONSE. 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.