The Bolt,shear, cataloged under National Stock Number 5306-01-688-3321, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is Valley-Todeco, Inc. Dba Arconic Fastening Systems. Government technical data includes 17 specifications, cited from the U.S. Government catalog. The record lists 8 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-01-688-3321 |
| Primary Part Number | NAS6708U28 |
| Item Name | Bolt,shear |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Valley-Todeco, Inc. Dba Arconic Fastening Systems |
| Status | ACTIVE |
| Head Height | 0.250 INCHES NOMINAL IN |
| Fastener Length | 2.485 INCHES NOMINAL IN |
| Surface Treatment Document and Classification | AMS2700, METHOD 1, TYPE 2 OR 8, CLASS 4 ASSN STD SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 0.735 INCHES NOMINAL IN |
| Material Document and Classification | AMS 5731 ASSN STD SINGLE MATERIAL RESPONSE OR AMS 5732 ASSN STD SINGLE MATERIAL RESPONSE OR AMS 5737 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.500 INCHES IN |
| Head Style | HEXAGON |
| Thread Direction | RIGHT-HAND |
| Grip Length | 1.750 INCHES NOMINAL IN |
| Width Between Flats | 0.741 INCHES MINIMUM AND 0.752 INCHES MAXIMUM IN |
| Grip Diameter | 0.4985 INCHES MINIMUM AND 0.4990 INCHES MAXIMUM IN |
| Surface Treatment | PASSIVATE OVERALL |
| Minimum Tensile Strength | 160000 POUNDS PER SQUARE INCH LBS |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 20 |
| Material | IRON ALLOY 660 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 |
|---|---|
| NAS6708U28 | Valley-Todeco, Inc. Dba Arconic Fastening Systems (USA) |
| NAS6708U28 | Federal Manufacturing Corp (USA) |
| NAS6708U28 | Sonic Industries, Inc. Dba Sonic Industries Inc Div Sonic Industries (USA) |
| NAS6708U28 | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| NAS6708U28 | Space-Lok, Inc. Dba Space-Lok Inc Div Space-Lok (USA) |
| NAS6708U28 | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| NAS6708U28 | Howmet Global Fastening Systems Inc Div City of Industry Operations (USA) |
| NAS6708U28 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| Reference | Meaning |
|---|---|
| NAS6708U28 | 5/2 Secondary reference U.S. Government activity |
| NAS6708U28 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5306-01-688-3321 is a Bolt,shear, manufactured by Valley-Todeco, Inc. Dba Arconic Fastening Systems, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-688-3321 has 8 manufacturer part numbers on file: NAS6708U28 (Valley-Todeco, Inc. Dba Arconic Fastening Systems), NAS6708U28 (Federal Manufacturing Corp), NAS6708U28 (Sonic Industries, Inc. Dba Sonic Industries Inc Div Sonic Industries), NAS6708U28 (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc), NAS6708U28 (Space-Lok, Inc. Dba Space-Lok Inc Div Space-Lok) and 3 more.
Key specifications for NAS6708U28: Head Height: 0.250 INCHES NOMINAL IN; Fastener Length: 2.485 INCHES NOMINAL IN; Surface Treatment Document and Classification: AMS2700, METHOD 1, TYPE 2 OR 8, CLASS 4 ASSN STD SINGLE TREATMENT RESPONSE OVERALL; Thread Length: 0.735 INCHES NOMINAL IN. 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.