The Screw,close Tolerance, cataloged under National Stock Number 5305-01-021-6846, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Sps Technologies, Llc Dba PB Fasteners. The record lists 16 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | Sps Technologies, Llc Dba PB Fasteners (CAGE 56878); Huck International, Inc (CAGE 17446); Howmet Global Fastening Systems Inc (CAGE 06950); Reid Products Inc. Dba Reid Products Inc (CAGE 59563); Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (CAGE 06725) |
| Parameter | Value |
|---|---|
| NSN | 5305-01-021-6846 |
| Primary Part Number | HT4028L4-3 |
| Item Name | Screw,close Tolerance |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Sps Technologies, Llc Dba PB Fasteners |
| 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 |
|---|---|
| HT4028L4-3 PRIMARY | Sps Technologies, Llc Dba PB Fasteners (USA) |
| HT4028L4-3 PRIMARY | Huck International, Inc (USA) |
| HT4028L4-3 PRIMARY | Howmet Global Fastening Systems Inc (USA) |
| 11909V4L3-1 | Reid Products Inc. Dba Reid Products Inc (USA) |
| HT4028L4-3 | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| HT4028L4-3 | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| HT4028L4-3 | Sps Technologies Ltd, Tj Brooks Division (GBR) |
| WC4028L4-3 | West Coast Aerospace, Inc. (USA) |
| ST3M466V4L3-1 | Heartland Precision Fasteners Inc (USA) |
| HT4028L4-3 PRIMARY | Hi-Shear Corporation (USA) |
| HT4028L4-3 | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| ST3M466V4L3-1 | Saturn Fasteners Inc (USA) |
| ST3M466V4L3-1 | Houston Precision Fasteners I Lp (USA) |
| ST3M466V4L3-1 | Linread Northbridge (aircraft Product Division) (GBR) |
| ST3M466V4L3-1 | Fastener Innovation Technology, Inc. Dba F I T (USA) |
| ST3M466V4L3-1 | Camcar Llc Div Camcar Llc (USA) |
| Reference | Meaning |
|---|---|
| ST3M466V4L3-1 | 7/2 Vendor item drawing reference The Boeing Company Div Defense |
| HT4028L4-3 | 5/9 Secondary reference U.S. Government activity |
| HT4028L4-3 | 3/2 Design control — primary reference U.S. Government activity |
| 10114859 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
| HT4028L4-3 | 5/9 Secondary reference U.S. Government activity |
NSN 5305-01-021-6846 is a Screw,close Tolerance, manufactured by Sps Technologies, Llc Dba PB Fasteners, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-021-6846 has 16 manufacturer part numbers on file: HT4028L4-3 (Sps Technologies, Llc Dba PB Fasteners), HT4028L4-3 (Huck International, Inc), HT4028L4-3 (Howmet Global Fastening Systems Inc), 11909V4L3-1 (Reid Products Inc. Dba Reid Products Inc), HT4028L4-3 (Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company) and 11 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.