The Bolt,close Tolerance, cataloged under National Stock Number 5306-01-308-3335, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is The Boeing Company Div Defense. The record lists 11 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | Bolt,close Tolerance |
| FSC / FSG | 5306 — Bolts (FSG 53) |
| Manufacturers | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (CAGE 06725); The Boeing Company Div Defense (CAGE 76301); Sps Technologies, Llc Dba PB Fasteners (CAGE 56878); Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (CAGE 27624); Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAGE L4528) |
| Parameter | Value |
|---|---|
| NSN | 5306-01-308-3335 |
| Primary Part Number | ST3M571-6D21 |
| Item Name | Bolt,close Tolerance |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Part Number | Manufacturer |
|---|---|
| ST3M571-6D21 | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| ST3M571-6D21 PRIMARY | The Boeing Company Div Defense (USA) |
| ST3M571-6D21 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| ST3M571-6D21 | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| ST3M571-6D21 | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| ST3M571-6D21 | Sonic Industries, Inc. Dba Sonic Industries Inc Div Sonic Industries (USA) |
| ST3M571-6D21 | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| ST3M571-6D21 | J M Precision Inc (USA) |
| ST3M571-6D21 | Howmet Global Fastening Systems Inc (USA) |
| ST3M571-6D21 | Fastener Innovation Technology, Inc. Dba F I T (USA) |
| ST3M571-6D21 | Hi-Shear Corporation (USA) |
| Reference | Meaning |
|---|---|
| VS3060-6D21 | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
| MB84-6D21 | C/1 Advisory reference — outside the item-of-supply concept Hi-Shear Corporation |
| BM3326-6D21 | C/1 Advisory reference — outside the item-of-supply concept Huck International, Inc |
| BM3326-6D21 | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
NSN 5306-01-308-3335 is a Bolt,close Tolerance, manufactured by The Boeing Company Div Defense, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-308-3335 has 11 manufacturer part numbers on file: ST3M571-6D21 (Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company), ST3M571-6D21 (The Boeing Company Div Defense), ST3M571-6D21 (Sps Technologies, Llc Dba PB Fasteners), ST3M571-6D21 (Sps Technologies Llc Dba PB Fasteners Div PB Fasteners), ST3M571-6D21 (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc) and 6 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.