The Bolt,close Tolerance, cataloged under National Stock Number 5306-00-370-7830, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is Aero Engineering & Manufacturing Company of California, Llc Dba Aeroengineering & Manufacturing Co. Government technical data includes 8 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-00-370-7830 |
| Primary Part Number | 451840 |
| Item Name | Bolt,close Tolerance |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Aero Engineering & Manufacturing Company of California, Llc Dba Aeroengineering & Manufacturing Co |
| Status | ACTIVE |
| Head Height | 0.188 INCHES NOMINAL IN |
| Fastener Length | 4.960 INCHES NOMINAL IN |
| Thread Length | 0.375 INCHES MINIMUM IN |
| Shank Unthreaded Hole Diameter | 0.104 INCHES MINIMUM AND 0.109 INCHES MAXIMUM FIRST HOLE IN |
| Width Between Flats | 0.938 INCHES NOMINAL IN |
| Surface Treatment | CHROMIUM OVERALL |
| Minimum Tensile Strength | 200000 POUNDS PER SQUARE INCH LBS |
| Thread Class | 3A A |
| 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 |
|---|---|
| 451840 | Aero Engineering & Manufacturing Company of California, Llc Dba Aeroengineering & Manufacturing Co (USA) |
| 451840 | Mercer Products & Manufacturing Company Dba Mercer Products & Manufacturing Co Div Mercer Products & Manufacturing (USA) |
| Reference | Meaning |
|---|---|
| 451840 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5306-00-370-7830 is a Bolt,close Tolerance, manufactured by Aero Engineering & Manufacturing Company of California, Llc Dba Aeroengineering & Manufacturing Co, classified under FSC 5306, Bolts. Status: active.
NSN 5306-00-370-7830 has 2 manufacturer part numbers on file: 451840 (Aero Engineering & Manufacturing Company of California, Llc Dba Aeroengineering & Manufacturing Co), 451840 (Mercer Products & Manufacturing Company Dba Mercer Products & Manufacturing Co Div Mercer Products & Manufacturing).
1 possible match (shared part number, not a government interchangeability claim): 5995-01-555-7648. Verify interchangeability with system specifications before substitution.
Key specifications for 451840: Head Height: 0.188 INCHES NOMINAL IN; Fastener Length: 4.960 INCHES NOMINAL IN; Thread Length: 0.375 INCHES MINIMUM IN; Shank Unthreaded Hole Diameter: 0.104 INCHES MINIMUM AND 0.109 INCHES MAXIMUM FIRST HOLE IN. 8 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.