The Bolt,close Tolerance, cataloged under National Stock Number 5306-01-374-5391, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is Deutsch Co the. Government technical data includes 17 specifications, cited from the U.S. Government catalog. The record lists 9 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-01-374-5391 |
| Primary Part Number | BM3326-7-30 |
| Item Name | Bolt,close Tolerance |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Deutsch Co the |
| Status | ACTIVE |
| Extended Washer Thickness | 0.089 INCHES MINIMUM AND 0.109 INCHES MAXIMUM IN |
| Head Height | 0.425 INCHES MINIMUM AND 0.445 INCHES MAXIMUM IN |
| Fastener Length | 2.565 INCHES MINIMUM AND 2.595 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Extended Washer Diameter | 0.740 INCHES MINIMUM AND 0.750 INCHES MAXIMUM IN |
| Thread Length | 0.622 INCHES MINIMUM AND 0.705 INCHES MAXIMUM IN |
| Nominal Thread Diameter | 0.437 INCHES IN |
| Head Style | DOUBLE HEXAGON W/HOLE |
| Thread Direction | RIGHT-HAND |
| Grip Length | 1.875 INCHES NOMINAL IN |
| Width Between Flats | 0.502 INCHES NOMINAL IN |
| Grip Diameter | 0.4365 INCHES MINIMUM AND 0.4370 INCHES MAXIMUM IN |
| Surface Treatment | PASSIVATE OVERALL |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 20 |
| Material | STEEL COMP XM-13 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| 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 |
|---|---|
| ST3M571-7-30 | Sonic Industries, Inc. Dba Sonic Industries Inc Div Sonic Industries (USA) |
| BM3326-7-30 PRIMARY | Deutsch Co the (USA) |
| ST3M571-7-30 | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| ST3M571-7-30 PRIMARY | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| VAL23033-7-30 PRIMARY | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| MB84-7-30 PRIMARY | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| ST3M571-7-30 PRIMARY | The Boeing Company Div Defense (USA) |
| MB84-7-30 PRIMARY | Hi-Shear Corporation (USA) |
| 74328-7-30 PRIMARY | Sps Technologies, Llc Dba PB Fasteners (USA) |
| Reference | Meaning |
|---|---|
| VS3060-7-30 | 5/9 Secondary reference U.S. Government activity |
| ST3M571-7-30 | 5/2 Secondary reference U.S. Government activity |
| 74328-7-30 | 3/2 Design control — primary reference U.S. Government activity |
| VS3060-7-30 | C/1 Advisory reference — outside the item-of-supply concept Howmet Global Fastening Systems Inc |
| S371-7-30 | C/1 Advisory reference — outside the item-of-supply concept Huck International, Inc |
| S371-7-30 | 5/9 Secondary reference U.S. Government activity |
NSN 5306-01-374-5391 is a Bolt,close Tolerance, manufactured by Deutsch Co the, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-374-5391 has 9 manufacturer part numbers on file: ST3M571-7-30 (Sonic Industries, Inc. Dba Sonic Industries Inc Div Sonic Industries), BM3326-7-30 (Deutsch Co the), ST3M571-7-30 (Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company), ST3M571-7-30 (Sps Technologies Llc Dba PB Fasteners Div PB Fasteners), VAL23033-7-30 (Valley-Todeco, Inc. Dba Arconic Fastening Systems) and 4 more.
Key specifications for BM3326-7-30: Extended Washer Thickness: 0.089 INCHES MINIMUM AND 0.109 INCHES MAXIMUM IN; Head Height: 0.425 INCHES MINIMUM AND 0.445 INCHES MAXIMUM IN; Fastener Length: 2.565 INCHES MINIMUM AND 2.595 INCHES MAXIMUM IN; Surface Treatment Document and Classification: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL. 17 specifications are documented in the U.S. Government catalog.
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.