The Screw,close Tolerance, cataloged under National Stock Number 5305-01-170-8487, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Hi-Shear Corporation. The record lists 6 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 13 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Item Name | Screw,close Tolerance |
| FSC / FSG | 5305 — Screws (FSG 53) |
| Manufacturers | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAGE L4528); Hi-Shear Corporation (CAGE 73197); The Boeing Company Div Defense (CAGE 76301) |
| Parameter | Value |
|---|---|
| NSN | 5305-01-170-8487 |
| Primary Part Number | HT4057-4-23 |
| Item Name | Screw,close Tolerance |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Hi-Shear Corporation |
| Status | ACTIVE |
| 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 |
|---|---|
| HT4057-4-23A | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| HT4057-4-23 PRIMARY | Hi-Shear Corporation (USA) |
| HT4057-4-23 PRIMARY | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| ST3M733-4L23 | The Boeing Company Div Defense (USA) |
| HT4057-4-23A | Hi-Shear Corporation (USA) |
| ST3M733-4-23 PRIMARY | The Boeing Company Div Defense (USA) |
| Reference | Meaning |
|---|---|
| HT4057-4-23 | 5/9 Secondary reference U.S. Government activity |
| ST3M733-4L23 | C/1 Advisory reference — outside the item-of-supply concept H C Slingsby Plc |
| HT4057-4-23 | C/1 Advisory reference — outside the item-of-supply concept Howmet Global Fastening Systems Inc |
| ST3M733-4L23 | 5/2 Secondary reference U.S. Government activity |
| HT4057-4-23A | 5/2 Secondary reference U.S. Government activity |
| HT4057-4-23 | 5/2 Secondary reference U.S. Government activity |
| HT4057-4-23 | C/1 Advisory reference — outside the item-of-supply concept Huck International, Inc |
| HT4057-4-23A | C/1 Advisory reference — outside the item-of-supply concept Howmet Global Fastening Systems Inc |
| ST3M733-4L23 | 5/9 Secondary reference Hc Slingsby Plc |
| HT4057-4-23A | C/1 Advisory reference — outside the item-of-supply concept Huck International, Inc |
| HT4057-4-23 | 5/9 Secondary reference U.S. Government activity |
| HT4057-4-23A | 5/9 Secondary reference U.S. Government activity |
| HT4057-4-23A | 5/9 Secondary reference U.S. Government activity |
NSN 5305-01-170-8487 is a Screw,close Tolerance, manufactured by Hi-Shear Corporation, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-170-8487 has 6 manufacturer part numbers on file: HT4057-4-23A (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc), HT4057-4-23 (Hi-Shear Corporation), HT4057-4-23 (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc), ST3M733-4L23 (The Boeing Company Div Defense), HT4057-4-23A (Hi-Shear Corporation) and 1 more.
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.