The Screw,close Tolerance, cataloged under National Stock Number 5305-01-231-7420, 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 7 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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.
| Item Name | Screw,close Tolerance |
| FSC / FSG | 5305 — Screws (FSG 53) |
| Manufacturers | Twist Tite Mfg, Inc Dba Twist Tite Manufacturing Inc (CAGE 007R1); Reid Products Inc. Dba Reid Products Inc (CAGE 59563); Hi-Shear Corporation (CAGE 73197); Howmet Global Fastening Systems Inc (CAGE 06950); Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAGE L4528) |
| Parameter | Value |
|---|---|
| NSN | 5305-01-231-7420 |
| Primary Part Number | HT4057-4-12A |
| 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 |
|---|---|
| ST3M733-4L12 | Twist Tite Mfg, Inc Dba Twist Tite Manufacturing Inc (USA) |
| 11935-4L-12 | Reid Products Inc. Dba Reid Products Inc (USA) |
| HT4057-4-12A PRIMARY | Hi-Shear Corporation (USA) |
| HT4057-4-12A | Howmet Global Fastening Systems Inc (USA) |
| HT4057-4-12A PRIMARY | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| HT4057-4-12A | Huck International, Inc (USA) |
| HT4057-4-12A | Sps Technologies Ltd, Tj Brooks Division (GBR) |
| Reference | Meaning |
|---|---|
| HT4057-4-12A | 5/9 Secondary reference U.S. Government activity |
| HT4057-4-12A | 5/2 Secondary reference U.S. Government activity |
| ST3M733-4L-12 | 7/2 Vendor item drawing reference The Boeing Company Div Defense |
| HT4057-4-12A | 5/9 Secondary reference U.S. Government activity |
NSN 5305-01-231-7420 is a Screw,close Tolerance, manufactured by Hi-Shear Corporation, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-231-7420 has 7 manufacturer part numbers on file: ST3M733-4L12 (Twist Tite Mfg, Inc Dba Twist Tite Manufacturing Inc), 11935-4L-12 (Reid Products Inc. Dba Reid Products Inc), HT4057-4-12A (Hi-Shear Corporation), HT4057-4-12A (Howmet Global Fastening Systems Inc), HT4057-4-12A (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc) and 2 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.