The Bolt,machine, cataloged under National Stock Number 5306-00-151-1426, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is Leonardo Spa Helicopters Division - Production Site. Government technical data includes 17 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through both NSN and commercial part number lookups. 20 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Cancelled.
| Parameter | Value |
|---|---|
| NSN | 5306-00-151-1426 |
| Primary Part Number | AN4-6A |
| Item Name | Bolt,machine |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Leonardo Spa Helicopters Division - Production Site |
| Status | CANCELLED |
| Head Height | 0.140 INCHES MINIMUM AND 0.172 INCHES MAXIMUM IN |
| Fastener Length | 0.781 INCHES NOMINAL IN |
| Surface Treatment Document and Classification | QQ-P-416,TYPE 2,CLASS 3 FED SPEC ALL TREATMENT RESPONSES OVERALL |
| Thread Length | 0.397 INCHES MINIMUM IN |
| Hardness Rating | 26.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C MAXIMUM OVERALL |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Features Provided | FINISHED HEAD |
| Head Style | HEXAGON |
| Thread Direction | RIGHT-HAND |
| Grip Length | 0.383 INCHES NOMINAL IN |
| Width Between Flats | 0.428 INCHES MINIMUM AND 0.440 INCHES MAXIMUM IN |
| Surface Treatment | CADMIUM AND CHROMATE OVERALL |
| Minimum Tensile Strength | 125000 POUNDS PER SQUARE INCH LBS |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 28 |
| Material | STEEL OVERALL |
| Thread Series Designator | UNF |
| Acquisition Status | CANCELLED |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| AN4-6A | Leonardo Spa Helicopters Division - Production Site (ITA) |
| AF443-AN4-6S | C.g.m. Srl (ITA) |
| 2010255 | Embraer Aviation International (FRA) |
| 2010255 | Embraer S.a. (BRA) |
| 9321921127 | Pilatus Aircraft Ltd (CHE) |
| Reference | Meaning |
|---|---|
| 901766 | 5/1 Secondary reference Scandinavian Manufacturing Scama Ab |
| K47A74 | 5/9 Secondary reference Surface Combustion Inc |
| 6026-102-8 | 5/9 Secondary reference Raytheon Technical Services Company |
| 6026-8307-17 | 5/9 Secondary reference Raytheon Technical Services Company |
| 5306001511426 | 6/9 Informative reference only E.c.a Etablissement Central Des Approvisionnements Des Forces Armees Royales |
| 326-0716-00 | 5/9 Secondary reference Sps Technologies Inc Research and Development Laboratory |
| 145-540-90206 | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
| 326-0716 | C/1 Advisory reference — outside the item-of-supply concept Rockwell Collins, Inc. Dba Collins Aerospace Government Systems Div Collins Aerospace - Government Systems |
| AN4-6A | 5/9 Secondary reference U.S. Government activity |
| 8821048 | 5/9 Secondary reference Combat Capabilities Development Command (ccdc) Armaments Center Dba Ccdc Div Us Army Research, Development and Engineering Command Armament |
| 8821146 | 5/9 Secondary reference Combat Capabilities Development Command (ccdc) Armaments Center Dba Ccdc Div Us Army Research, Development and Engineering Command Armament |
| 8812928 | 5/9 Secondary reference Combat Capabilities Development Command (ccdc) Armaments Center Dba Ccdc Div Us Army Research, Development and Engineering Command Armament |
| 5306PL0809980 | 6/9 Informative reference only Jednolity Indeks Materialowy - Uniform Material Index |
| 6026-8340-1 | 5/9 Secondary reference Raytheon Technical Services Company |
| 2010255 | 5/9 Secondary reference Embraer Empresa Brasileira De Aeronautica Sa |
| 6026-4035-23 | 5/9 Secondary reference Raytheon Technical Services Company |
| 6026-7119-27 | 5/9 Secondary reference Raytheon Technical Services Company |
| AN4-6A | 5/9 Secondary reference U.S. Government activity |
| AN4-6A | 3/2 Design control — primary reference U.S. Government activity |
| 932.19.21.127 | 5/9 Secondary reference Pilatus Aircraft Ltd |
NSN 5306-00-151-1426 is a Bolt,machine, manufactured by Leonardo Spa Helicopters Division - Production Site, classified under FSC 5306, Bolts. Status: cancelled.
NSN 5306-00-151-1426 has 5 manufacturer part numbers on file: AN4-6A (Leonardo Spa Helicopters Division - Production Site), AF443-AN4-6S (C.g.m. Srl), 2010255 (Embraer Aviation International), 2010255 (Embraer S.a.), 9321921127 (Pilatus Aircraft Ltd).
3 possible matches (shared part number, not a government interchangeability claim): 5930-00-168-7964, 5120-01-373-8976, 5331-01-569-1324. Verify interchangeability with system specifications before substitution.
Key specifications for AN4-6A: Head Height: 0.140 INCHES MINIMUM AND 0.172 INCHES MAXIMUM IN; Fastener Length: 0.781 INCHES NOMINAL IN; Surface Treatment Document and Classification: QQ-P-416,TYPE 2,CLASS 3 FED SPEC ALL TREATMENT RESPONSES OVERALL; Thread Length: 0.397 INCHES MINIMUM 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.
NSN 5306-00-151-1426 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.
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.