The Screw,close Tolerance, cataloged under National Stock Number 5305-01-272-0775, 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 14 specifications, cited from the U.S. Government catalog. The record lists 3 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5305-01-272-0775 |
| Primary Part Number | HT184-8-19 |
| Item Name | Screw,close Tolerance |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Howmet Global Fastening Systems Inc |
| Status | ACTIVE |
| Head Height | 0.111 INCHES NOMINAL IN |
| Fastener Length | 1.188 INCHES NOMINAL IN |
| Thread Length | 0.453 INCHES NOMINAL IN |
| Nominal Thread Diameter | 0.500 INCHES IN |
| Head Style | FILLISTER |
| Thread Direction | RIGHT-HAND |
| Grip Length | 1.500 INCHES NOMINAL IN |
| Grip Diameter | 0.498 INCHES MINIMUM AND 0.499 INCHES MAXIMUM IN |
| Surface Treatment | CADMIUM OVERALL |
| Internal Drive Style | HIGH-TORQUE |
| Thread Class | 2A A |
| Material | STEEL COMP 4140 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Head Diameter | 0.711 INCHES MINIMUM AND 0.759 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 |
|---|---|
| HT184-8-19 | Hi-Shear Corporation (USA) |
| HT184-8-19 PRIMARY | Howmet Global Fastening Systems Inc (USA) |
| HT184-8-19 | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| Reference | Meaning |
|---|---|
| HT184-8-19 | 5/9 Secondary reference Sps Technologies, Llc Dba PB Fasteners |
| HT184-8-19 | 5/2 Secondary reference U.S. Government activity |
| HT184-8-19 | 3/9 Design control — primary reference U.S. Government activity |
NSN 5305-01-272-0775 is a Screw,close Tolerance, manufactured by Howmet Global Fastening Systems Inc, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-272-0775 has 3 manufacturer part numbers on file: HT184-8-19 (Hi-Shear Corporation), HT184-8-19 (Howmet Global Fastening Systems Inc), HT184-8-19 (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc).
Key specifications for HT184-8-19: Head Height: 0.111 INCHES NOMINAL IN; Fastener Length: 1.188 INCHES NOMINAL IN; Thread Length: 0.453 INCHES NOMINAL IN; Nominal Thread Diameter: 0.500 INCHES IN. 14 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.