The Bolt,shear, cataloged under National Stock Number 5306-01-249-3706, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company. Government technical data includes 18 specifications, cited from the U.S. Government catalog. The record lists 14 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 10 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-01-249-3706 |
| Primary Part Number | AIC752-6-28 |
| Item Name | Bolt,shear |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company |
| Status | ACTIVE |
| Extended Washer Thickness | 0.081 INCHES MINIMUM AND 0.101 INCHES MAXIMUM IN |
| Head Height | 0.378 INCHES MINIMUM AND 0.398 INCHES MAXIMUM IN |
| Fastener Length | 2.349 INCHES MINIMUM AND 2.379 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Extended Washer Diameter | 0.429 INCHES MINIMUM AND 0.449 INCHES MAXIMUM IN |
| Thread Length | 0.589 INCHES MINIMUM AND 0.639 INCHES MAXIMUM IN |
| Nominal Thread Diameter | 0.375 INCHES IN |
| Head Style | DOUBLE HEXAGON W/HOLE |
| Thread Direction | RIGHT-HAND |
| Grip Length | 1.740 INCHES MINIMUM AND 1.760 INCHES MAXIMUM IN |
| Width Between Flats | 0.639 INCHES MINIMUM AND 0.649 INCHES MAXIMUM IN |
| Grip Diameter | 0.3740 INCHES MINIMUM AND 0.3745 INCHES MAXIMUM IN |
| Surface Treatment | PASSIVATE OVERALL |
| Minimum Tensile Strength | 220000 POUNDS PER SQUARE INCH LBS |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 24 |
| 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 |
|---|---|
| ST3M571-6-28 | Fastener Innovation Technology, Inc. Dba F I T (USA) |
| VAL23033-6-28 | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| ST3M571-6-28 | Saturn Fasteners Inc (USA) |
| BM3326-6-28 | Huck International, Inc (USA) |
| GS1030-6-28 | B & B Specialties Inc Dba Gs Aerospace Div Gs Aerospace (USA) |
| ST3M571-6-28 | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| 11831-6-28 | Reid Products Inc. Dba Reid Products Inc (USA) |
| SLB253-6-28 | Space-Lok, Inc. Dba Space-Lok Inc Div Space-Lok (USA) |
| 74328-6-28 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| AIC752-6-28 PRIMARY | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| MB84-6-28 | Hi-Shear Corporation (USA) |
| ST3M571-6-28 | Houston Precision Fasteners I Lp (USA) |
| VS3060-6-28 | Howmet Global Fastening Systems Inc (USA) |
| HP7571-6-28 | Heartland Precision Fasteners Inc (USA) |
| Reference | Meaning |
|---|---|
| BM3326-6-28 | 5/9 Secondary reference U.S. Government activity |
| ST3M571-6-28 | 5/9 Secondary reference U.S. Government activity |
| ST3M571-6-28 | 5/9 Secondary reference J M Precision Inc |
| S11-1059-6-28 | 5/9 Secondary reference Sonic Industries, Inc. Dba Sonic Industries Inc Div Sonic Industries |
| 74328-6-28 | 5/2 Secondary reference U.S. Government activity |
| MB84-6-28 | 5/9 Secondary reference Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc |
| VS3060-6-28 | 5/9 Secondary reference U.S. Government activity |
| S371-6-28 | 5/9 Secondary reference U.S. Government activity |
| S371-6-28 | 5/9 Secondary reference Huck International, Inc |
| ST3M571-6-28 | 5/9 Secondary reference The Boeing Company Div Defense |
NSN 5306-01-249-3706 is a Bolt,shear, manufactured by Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-249-3706 has 14 manufacturer part numbers on file: ST3M571-6-28 (Fastener Innovation Technology, Inc. Dba F I T), VAL23033-6-28 (Valley-Todeco, Inc. Dba Arconic Fastening Systems), ST3M571-6-28 (Saturn Fasteners Inc), BM3326-6-28 (Huck International, Inc), GS1030-6-28 (B & B Specialties Inc Dba Gs Aerospace Div Gs Aerospace) and 9 more.
Key specifications for AIC752-6-28: Extended Washer Thickness: 0.081 INCHES MINIMUM AND 0.101 INCHES MAXIMUM IN; Head Height: 0.378 INCHES MINIMUM AND 0.398 INCHES MAXIMUM IN; Fastener Length: 2.349 INCHES MINIMUM AND 2.379 INCHES MAXIMUM IN; Surface Treatment Document and Classification: QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL. 18 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.