The Bolt,shear, cataloged under National Stock Number 5306-00-623-0870, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is Northrop Grumman Systems Corporation. Government technical data includes 19 specifications, cited from the U.S. Government catalog. The record lists 8 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5306-00-623-0870 |
| Primary Part Number | 51B464-8-25 |
| Item Name | Bolt,shear |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Northrop Grumman Systems Corporation |
| Status | ACTIVE |
| Head Height | 0.245 INCHES MINIMUM AND 0.265 INCHES MAXIMUM IN |
| Fastener Length | 2.005 INCHES MINIMUM AND 2.046 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | QQ-P-416,TY 2,CL 2 FED SPEC ALL TREATMENT RESPONSES OVERALL |
| Thread Length | 0.433 INCHES MINIMUM AND 0.494 INCHES MAXIMUM IN |
| Hardness Rating | 39.0 ROCKWELL C MINIMUM AND 43.0 ROCKWELL C MAXIMUM OVERALL |
| Shank Unthreaded Hole Diameter | 0.106 INCHES NOMINAL FIRST HOLE IN |
| Nominal Thread Diameter | 0.500 INCHES IN |
| Head Style | HEXAGON |
| Thread Direction | RIGHT-HAND |
| Grip Length | 1.552 INCHES MINIMUM AND 1.572 INCHES MAXIMUM IN |
| Width Between Flats | 0.740 INCHES MINIMUM AND 0.752 INCHES MAXIMUM IN |
| Grip Diameter | 0.4985 INCHES MINIMUM AND 0.4995 INCHES MAXIMUM IN |
| Surface Treatment | CADMIUM AND CHROMATE OVERALL |
| Minimum Tensile Strength | 180000 POUNDS PER SQUARE INCH LBS |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 20 |
| Material | STEEL COMP E4340 OR STEEL COMP 4340 OR STEEL COMP 4140 OR STEEL COMP 8740 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Distance From Head Largest Bearing Surface to Shank Hole Center | 1.882 INCHES MINIMUM AND 1.923 INCHES MAXIMUM 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 |
|---|---|
| 51B464-8-25 | Huck International, Inc (USA) |
| 51B464-8-25 | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| 51B464-8-25 | Sps Technologies Llc Dba PB Fasteners Div PB Fasteners (USA) |
| 51B464-8-25 PRIMARY | Northrop Grumman Systems Corporation (USA) |
| 51B464-8-25 | Hi-Shear Corporation (USA) |
| 51B464-8-25 PRIMARY | Northrop Grumman Systems Corporation Dba Northrop Grumman Is Div Northrop Grumman Aeronautics Systems (USA) |
| 51B464-8-25 | Howmet Global Fastening Systems Inc (USA) |
| 51B464-8-25 | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| Reference | Meaning |
|---|---|
| 51B464-8-25 | 5/2 Secondary reference U.S. Government activity |
| 51B464-8-25 | 5/9 Secondary reference U.S. Government activity |
| 51B464-8-25 | 5/9 Secondary reference Northrop Grumman Technical Services, Inc. Dba Defense Systems Sector |
| 51B464-8-25 | 5/2 Secondary reference U.S. Government activity |
NSN 5306-00-623-0870 is a Bolt,shear, manufactured by Northrop Grumman Systems Corporation, classified under FSC 5306, Bolts. Status: active.
NSN 5306-00-623-0870 has 8 manufacturer part numbers on file: 51B464-8-25 (Huck International, Inc), 51B464-8-25 (Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company), 51B464-8-25 (Sps Technologies Llc Dba PB Fasteners Div PB Fasteners), 51B464-8-25 (Northrop Grumman Systems Corporation), 51B464-8-25 (Hi-Shear Corporation) and 3 more.
Key specifications for 51B464-8-25: Head Height: 0.245 INCHES MINIMUM AND 0.265 INCHES MAXIMUM IN; Fastener Length: 2.005 INCHES MINIMUM AND 2.046 INCHES MAXIMUM IN; Surface Treatment Document and Classification: QQ-P-416,TY 2,CL 2 FED SPEC ALL TREATMENT RESPONSES OVERALL; Thread Length: 0.433 INCHES MINIMUM AND 0.494 INCHES MAXIMUM IN. 19 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.