The Screw,close Tolerance, cataloged under National Stock Number 5305-01-102-5527, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is West Coast Aerospace, Inc.. The record lists 12 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 15 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | West Coast Aerospace, Inc. (CAGE 60516); Twist Tite Mfg, Inc Dba Twist Tite Manufacturing Inc (CAGE 007R1); Huck International, Inc (CAGE 17446); Hi-Shear Corporation (CAGE 73197); Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAGE L4528) |
| Parameter | Value |
|---|---|
| NSN | 5305-01-102-5527 |
| Primary Part Number | WC4057-4-6 |
| Item Name | Screw,close Tolerance |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | West Coast Aerospace, Inc. |
| 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 |
|---|---|
| WC4057-4-6 PRIMARY | West Coast Aerospace, Inc. (USA) |
| ST3M733-4L6 | Twist Tite Mfg, Inc Dba Twist Tite Manufacturing Inc (USA) |
| HT4057-4-6A PRIMARY | Huck International, Inc (USA) |
| HT4057-4-6A PRIMARY | Hi-Shear Corporation (USA) |
| HT4057-4-6A PRIMARY | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| HT4057-4-6A | Sps Technologies Ltd, Tj Brooks Division (GBR) |
| ST3M733-4L6 | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| HT4057-4-6A PRIMARY | Howmet Global Fastening Systems Inc (USA) |
| HT4057-4-6A PRIMARY | Sps Technologies, Llc Dba PB Fasteners (USA) |
| ST3M733-4L6 | Hi-Shear Corporation (USA) |
| ST3M733-4L6 | Sps Technologies Ltd, Tj Brooks Division (GBR) |
| ST3M733-4L6 PRIMARY | Fastener Innovation Technology, Inc. Dba F I T (USA) |
| Reference | Meaning |
|---|---|
| HT4057-4-6 | 5/9 Secondary reference Sps Technologies, Llc Dba PB Fasteners |
| ST3M733-4-6 | 5/9 Secondary reference The Boeing Company Div Defense |
| HT4057-4-6 | 5/9 Secondary reference U.S. Government activity |
| CHT4057-4-6 | 5/9 Secondary reference U.S. Government activity |
| CHT4057-4-6 | 5/9 Secondary reference Howmet Global Fastening Systems Inc |
| HT4057-4-6 | C/1 Advisory reference — outside the item-of-supply concept Huck International, Inc |
| HT4057-4-6 | 5/9 Secondary reference Hi-Shear Corporation |
| HT4057-4-6 | 5/9 Secondary reference U.S. Government activity |
| HT4057-4-6 | 5/9 Secondary reference U.S. Government activity |
| HT4057-4-6A | 3/2 Design control — primary reference U.S. Government activity |
| ST3M733-4L6 | 7/2 Vendor item drawing reference The Boeing Company Div Defense |
| HT4057-4-6A | 5/9 Secondary reference U.S. Government activity |
| ST3M733-4L6 | 5/9 Secondary reference Sps Technologies Inc |
| HT4057-4-6A | 5/9 Secondary reference U.S. Government activity |
| HT4057-4-6 | 5/9 Secondary reference Howmet Global Fastening Systems Inc |
NSN 5305-01-102-5527 is a Screw,close Tolerance, manufactured by West Coast Aerospace, Inc., classified under FSC 5305, Screws. Status: active.
NSN 5305-01-102-5527 has 12 manufacturer part numbers on file: WC4057-4-6 (West Coast Aerospace, Inc.), ST3M733-4L6 (Twist Tite Mfg, Inc Dba Twist Tite Manufacturing Inc), HT4057-4-6A (Huck International, Inc), HT4057-4-6A (Hi-Shear Corporation), HT4057-4-6A (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc) and 7 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.