The Bolt,internally Relieved Body, cataloged under National Stock Number 5306-00-007-5819, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is Howe Machine & Tool Corp. Dba Howe Machine & Tool Corp. Government technical data includes 21 specifications, cited from the U.S. Government catalog. The record lists 4 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5306-00-007-5819 |
| Primary Part Number | A51B40510-13 |
| Item Name | Bolt,internally Relieved Body |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Howe Machine & Tool Corp. Dba Howe Machine & Tool Corp |
| Status | ACTIVE |
| Head Height | 0.140 INCHES NOMINAL IN |
| Fastener Length | 2.420 INCHES NOMINAL IN |
| Concentric Hole Depth | 1.830 INCHES NOMINAL IN |
| Thread Length | 0.390 INCHES MINIMUM IN |
| Shank Unthreaded Hole Diameter | 0.106 INCHES MINIMUM AND 0.116 INCHES MAXIMUM FIRST HOLE IN |
| Style Designator | CONCENTRIC HOLE UNTHREADED |
| Nominal Thread Diameter | 0.500 INCHES IN |
| Head Style | HEXAGON |
| Thread Direction | RIGHT-HAND |
| Width Between Flats | 1.052 INCHES MINIMUM AND 1.064 INCHES MAXIMUM IN |
| Shoulder Diameter | 0.7470 INCHES MINIMUM AND 0.7476 INCHES MAXIMUM IN |
| Concentric Hole Diameter | 0.500 INCHES NOMINAL IN |
| Surface Treatment | CHROMIUM GRIP |
| Surface Treatment | CADMIUM HEAD |
| Surface Treatment | CHROMIUM THREADS |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 20 |
| Material | STEEL OVERALL |
| Shoulder Length | 2.030 INCHES NOMINAL IN |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Distance From Head Largest Bearing Surface to Shank Hole Center | 2.300 INCHES NOMINAL FIRST HOLE 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 |
|---|---|
| A51B40510-13 | Howe Machine & Tool Corp. Dba Howe Machine & Tool Corp (USA) |
| A51B40510-13 | Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp Div Northrop Grumman Aeronautics Systems (USA) |
| A51B40510-13 | Alvord-Polk, Inc Dba Ampm Div Aircraft Missile Parts Manufacturing (USA) |
| A51B40510-13 | Tek-Electric Control Inc (USA) |
| Reference | Meaning |
|---|---|
| A51B40510-13 | C/1 Advisory reference — outside the item-of-supply concept Northrop Grumman Systems Corporation |
| A51B40510-13 | 3/9 Design control — primary reference Northrop Grumman Systems Corporation |
NSN 5306-00-007-5819 is a Bolt,internally Relieved Body, manufactured by Howe Machine & Tool Corp. Dba Howe Machine & Tool Corp, classified under FSC 5306, Bolts. Status: active.
NSN 5306-00-007-5819 has 4 manufacturer part numbers on file: A51B40510-13 (Howe Machine & Tool Corp. Dba Howe Machine & Tool Corp), A51B40510-13 (Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp Div Northrop Grumman Aeronautics Systems), A51B40510-13 (Alvord-Polk, Inc Dba Ampm Div Aircraft Missile Parts Manufacturing), A51B40510-13 (Tek-Electric Control Inc).
Key specifications for A51B40510-13: Head Height: 0.140 INCHES NOMINAL IN; Fastener Length: 2.420 INCHES NOMINAL IN; Concentric Hole Depth: 1.830 INCHES NOMINAL IN; Thread Length: 0.390 INCHES MINIMUM IN. 21 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.