The Screw,close Tolerance, cataloged under National Stock Number 5305-01-584-5745, 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 8 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-584-5745 |
| Primary Part Number | HT8137-5-4 |
| Item Name | Screw,close Tolerance |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Howmet Global Fastening Systems Inc |
| Status | ACTIVE |
| Fastener Length | 0.781 INCHES NOMINAL IN |
| Thread Length | 0.531 INCHES NOMINAL IN |
| Nominal Thread Diameter | 0.312 INCHES IN |
| Head Style | FLAT COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Grip Length | 0.250 INCHES NOMINAL IN |
| Grip Diameter | 0.311 INCHES MINIMUM AND 0.312 INCHES MAXIMUM IN |
| Internal Drive Style | HIGH-TORQUE |
| Countersink Angle | 100.0 DEGREES NOMINAL |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 24 |
| Material | TITANIUM OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Head Diameter | 0.628 INCHES MINIMUM AND 0.634 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 |
|---|---|
| HT8137-5-4 PRIMARY | Howmet Global Fastening Systems Inc (USA) |
| ST3M430V5-4D | Fastener Innovation Technology, Inc. Dba F I T (USA) |
| ST3M430V5-4D | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| WC8137-5-4 | West Coast Aerospace, Inc. (USA) |
| ST3M430V5-4D | Hi-Shear Corporation (USA) |
| BM33024V5-4 | Huck International, Inc (USA) |
| ST3M430V5-4D | The Boeing Company Div Defense (USA) |
| ST3M430V5-4D | Houston Precision Fasteners I Lp (USA) |
| Reference | Meaning |
|---|---|
| ST3M430V5-4D | 5/2 Secondary reference U.S. Government activity |
NSN 5305-01-584-5745 is a Screw,close Tolerance, manufactured by Howmet Global Fastening Systems Inc, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-584-5745 has 8 manufacturer part numbers on file: HT8137-5-4 (Howmet Global Fastening Systems Inc), ST3M430V5-4D (Fastener Innovation Technology, Inc. Dba F I T), ST3M430V5-4D (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc), WC8137-5-4 (West Coast Aerospace, Inc.), ST3M430V5-4D (Hi-Shear Corporation) and 3 more.
Key specifications for HT8137-5-4: Fastener Length: 0.781 INCHES NOMINAL IN; Thread Length: 0.531 INCHES NOMINAL IN; Nominal Thread Diameter: 0.312 INCHES IN; Head Style: FLAT COUNTERSUNK. 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.