The Screw,machine, cataloged under National Stock Number 5305-01-327-6028, 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 16 specifications, cited from the U.S. Government catalog. The record lists 5 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-327-6028 |
| Primary Part Number | SC178RV3-8 |
| Item Name | Screw,machine |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Howmet Global Fastening Systems Inc |
| Status | ACTIVE |
| Fastener Length | 0.824 INCHES MINIMUM AND 0.854 INCHES MAXIMUM IN |
| Screw Material Document and Classification | AMS4967 ASSN STD SINGLE MATERIAL RESPONSE |
| Thread Length | 0.339 INCHES NOMINAL IN |
| Shank Surface Finish | 32.0 MICROINCHES |
| Nominal Thread Diameter | 0.190 INCHES IN |
| Head Style | FLAT COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Thread Surface Finish | 32.0 MICROINCHES |
| Screw Material | TITANIUM ALLOY UNS R56400 |
| Minimum Tensile Strength | 160000 POUNDS PER SQUARE INCH LBS |
| Internal Drive Style | TORQUE-SET RIBBED |
| Countersink Angle | 99.0 DEGREES MINIMUM AND 101.0 DEGREES MAXIMUM |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 32 |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Head Diameter | 0.344 INCHES MINIMUM AND 0.385 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 |
|---|---|
| SC178RV3-8 PRIMARY | Howmet Global Fastening Systems Inc (USA) |
| HR132V3R8 PRIMARY | Hi-Shear Corporation (USA) |
| AIC4038V3-8R PRIMARY | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| HR132V3R8 PRIMARY | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| PBF1380-2308 PRIMARY | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| Reference | Meaning |
|---|---|
| 123181V3R8 | 3/2 Design control — primary reference U.S. Government activity |
| LE111-0034-23-8 | 7/2 Vendor item drawing reference The Boeing Company Div Legacy Am&m |
| T034-2308 | C/1 Advisory reference — outside the item-of-supply concept Huck International, Inc |
| T034-2308 | 5/9 Secondary reference U.S. Government activity |
NSN 5305-01-327-6028 is a Screw,machine, manufactured by Howmet Global Fastening Systems Inc, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-327-6028 has 5 manufacturer part numbers on file: SC178RV3-8 (Howmet Global Fastening Systems Inc), HR132V3R8 (Hi-Shear Corporation), AIC4038V3-8R (Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company), HR132V3R8 (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc), PBF1380-2308 (Sps Technologies Llc Dba PB Fasteners Div PB Fasteners).
Key specifications for SC178RV3-8: Fastener Length: 0.824 INCHES MINIMUM AND 0.854 INCHES MAXIMUM IN; Screw Material Document and Classification: AMS4967 ASSN STD SINGLE MATERIAL RESPONSE; Thread Length: 0.339 INCHES NOMINAL IN; Shank Surface Finish: 32.0 MICROINCHES. 16 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.