The Bolt,internal Wrenching, cataloged under National Stock Number 5306-00-558-3903, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is All Manufacturers, Inc. Dba Allied Harbor Aerospace Fasteners. Government technical data includes 17 specifications, cited from the U.S. Government catalog. The record lists 3 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5306-00-558-3903 |
| Primary Part Number | A0L4164-282 |
| Item Name | Bolt,internal Wrenching |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | All Manufacturers, Inc. Dba Allied Harbor Aerospace Fasteners |
| Status | ACTIVE |
| Width Across Flats | 0.156 INCHES MINIMUM AND 0.158 INCHES MAXIMUM IN |
| Head Height | 0.185 INCHES MINIMUM AND 0.190 INCHES MAXIMUM IN |
| Fastener Length | 0.625 INCHES NOMINAL IN |
| Thread Length | 0.535 INCHES MINIMUM IN |
| Hardness Rating | 38.0 ROCKWELL C NOMINAL OVERALL |
| Material Document and Classification | AMS 5735 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.190 INCHES IN |
| Head Style | BEVEL-CONICAL |
| Thread Direction | RIGHT-HAND |
| Surface Treatment | CADMIUM AND CHROMATE OVERALL |
| Minimum Tensile Strength | 170000 POUNDS PER SQUARE INCH LBS |
| Internal Drive Style | HEXAGON |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 32 |
| Material | IRON ALLOY 660 OVERALL |
| Thread Series Designator | UNF |
| Head Diameter | 0.335 INCHES MINIMUM AND 0.343 INCHES MAXIMUM IN |
| 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 |
|---|---|
| A0L4164-282 PRIMARY | All Manufacturers, Inc. Dba Allied Harbor Aerospace Fasteners (USA) |
| 50909C7 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| SC2805-1032-10PB | Howmet Global Fastening Systems Inc (USA) |
| Reference | Meaning |
|---|---|
| 965398-282 | 5/2 Secondary reference U.S. Government activity |
| VS1146-10B | 5/2 Secondary reference U.S. Government activity |
NSN 5306-00-558-3903 is a Bolt,internal Wrenching, manufactured by All Manufacturers, Inc. Dba Allied Harbor Aerospace Fasteners, classified under FSC 5306, Bolts. Status: active.
NSN 5306-00-558-3903 has 3 manufacturer part numbers on file: A0L4164-282 (All Manufacturers, Inc. Dba Allied Harbor Aerospace Fasteners), 50909C7 (Sps Technologies, Llc Dba PB Fasteners), SC2805-1032-10PB (Howmet Global Fastening Systems Inc).
Key specifications for A0L4164-282: Width Across Flats: 0.156 INCHES MINIMUM AND 0.158 INCHES MAXIMUM IN; Head Height: 0.185 INCHES MINIMUM AND 0.190 INCHES MAXIMUM IN; Fastener Length: 0.625 INCHES NOMINAL IN; Thread Length: 0.535 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.
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.