The Bolt,machine, cataloged under National Stock Number 5306-01-191-5247, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is Ufc Aerospace Europe Limited. Government technical data includes 14 specifications, cited from the U.S. Government catalog. The record lists 5 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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.
| Parameter | Value |
|---|---|
| NSN | 5306-01-191-5247 |
| Primary Part Number | AS21406 |
| Item Name | Bolt,machine |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Ufc Aerospace Europe Limited |
| Status | ACTIVE |
| Extended Washer Thickness | 0.040 INCHES NOMINAL IN |
| Head Height | 0.258 INCHES NOMINAL IN |
| Fastener Length | 0.375 INCHES NOMINAL IN |
| Extended Washer Diameter | 0.375 INCHES NOMINAL IN |
| Thread Length | 0.283 INCHES MINIMUM AND 0.303 INCHES MAXIMUM IN |
| Material Document and Classification | DTD 5026 MFR REF SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.190 INCHES IN |
| Head Style | DOUBLE HEXAGON W/HOLE |
| Thread Direction | RIGHT-HAND |
| Width Between Flats | 0.250 INCHES NOMINAL IN |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 32 |
| Material | STEEL 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 |
|---|---|
| AS21406 | Ufc Aerospace Europe Limited (GBR) |
| AS21406 | Unbrako (a Division of S P S Technologies Ltd) (GBR) |
| AS21406 | Ontic Engineering & Manufacturing Uk Limited Div Ontic Engineering and Manufacturing Uk Limited (GBR) |
| AS21406 | Linread Ltd (GBR) |
| AS21406 | Sps Technologies Ltd, Tj Brooks Division (GBR) |
| Reference | Meaning |
|---|---|
| AS21406 | 3/9 Design control — primary reference Invacare Limited |
| AS21406 | 5/9 Secondary reference Ontic Engineering & Manufacturing, Inc Dba Ontic Us |
| AS21406 | C/1 Advisory reference — outside the item-of-supply concept Safran Electrical & Power Uk Limited |
| AS21406 | 5/9 Secondary reference Transaero, Inc. |
NSN 5306-01-191-5247 is a Bolt,machine, manufactured by Ufc Aerospace Europe Limited, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-191-5247 has 5 manufacturer part numbers on file: AS21406 (Ufc Aerospace Europe Limited), AS21406 (Unbrako (a Division of S P S Technologies Ltd)), AS21406 (Ontic Engineering & Manufacturing Uk Limited Div Ontic Engineering and Manufacturing Uk Limited), AS21406 (Linread Ltd), AS21406 (Sps Technologies Ltd, Tj Brooks Division).
Key specifications for AS21406: Extended Washer Thickness: 0.040 INCHES NOMINAL IN; Head Height: 0.258 INCHES NOMINAL IN; Fastener Length: 0.375 INCHES NOMINAL IN; Extended Washer Diameter: 0.375 INCHES NOMINAL IN. 14 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.