The Bolt,machine, cataloged under National Stock Number 5306-01-428-9510, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is Space-Lok, Inc. Dba Space-Lok Inc Div Space-Lok. Government technical data includes 15 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-01-428-9510 |
| Primary Part Number | SLB142A4-12 |
| Item Name | Bolt,machine |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Space-Lok, Inc. Dba Space-Lok Inc Div Space-Lok |
| Status | ACTIVE |
| Fastener Length | 1.191 INCHES MINIMUM AND 1.221 INCHES MAXIMUM IN |
| Thread Length | 0.456 INCHES MINIMUM AND 0.486 INCHES MAXIMUM IN |
| Material Document and Classification | AMS 4928 ASSN STD SINGLE MATERIAL RESPONSE OR AMS 4967 ASSN STD SINGLE MATERIAL RESPONSE FASTENER |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Head Style | FLAT COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Grip Length | 0.750 INCHES MINIMUM AND 0.766 INCHES MAXIMUM IN |
| Locking Feature | DETENT BALL HEAD |
| Countersink Angle | 100.0 DEGREES NOMINAL |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 28 |
| Material | TITANIUM ALLOY UNS R56400 FASTENER |
| Material | STEEL CORROSION RESISTING AND COBALT ALLOY SPRING |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Head Diameter | 0.486 INCHES MINIMUM AND 0.507 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 |
|---|---|
| LB87-4-12 | Hi-Shear Corporation (USA) |
| 03A227A4-12 | Northrop Grumman Systems Corp Dba Northrop Grumman Computing Systems (USA) |
| SLB142A4-12 PRIMARY | Space-Lok, Inc. Dba Space-Lok Inc Div Space-Lok (USA) |
| LB87-4-12 | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| Reference | Meaning |
|---|---|
| AS 368A4-12 | 5/2 Secondary reference U.S. Government activity |
| SLB1424A4-12 | 5/9 Secondary reference Space-Lok, Inc. Dba Space-Lok Inc Div Space-Lok |
| 03A227A4-12 | 7/2 Vendor item drawing reference Northrop Grumman Systems Corporation Dba Northrop Grumman Is Div Northrop Grumman Aeronautics Systems |
| AS368A5-12 | 5/9 Secondary reference U.S. Government activity |
NSN 5306-01-428-9510 is a Bolt,machine, manufactured by Space-Lok, Inc. Dba Space-Lok Inc Div Space-Lok, classified under FSC 5306, Bolts. Status: active.
NSN 5306-01-428-9510 has 4 manufacturer part numbers on file: LB87-4-12 (Hi-Shear Corporation), 03A227A4-12 (Northrop Grumman Systems Corp Dba Northrop Grumman Computing Systems), SLB142A4-12 (Space-Lok, Inc. Dba Space-Lok Inc Div Space-Lok), LB87-4-12 (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc).
Key specifications for SLB142A4-12: Fastener Length: 1.191 INCHES MINIMUM AND 1.221 INCHES MAXIMUM IN; Thread Length: 0.456 INCHES MINIMUM AND 0.486 INCHES MAXIMUM IN; Material Document and Classification: AMS 4928 ASSN STD SINGLE MATERIAL RESPONSE OR AMS 4967 ASSN STD SINGLE MATERIAL RESPONSE FASTENER; Nominal Thread Diameter: 0.250 INCHES IN. 15 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.