The Bolt,shoulder, cataloged under National Stock Number 5306-00-522-1813, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company. Government technical data includes 17 specifications, cited from the U.S. Government catalog. The record lists 10 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5306-00-522-1813 |
| Primary Part Number | HL218-6-3 |
| Item Name | Bolt,shoulder |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company |
| Status | ACTIVE |
| Head Height | 0.045 INCHES MINIMUM AND 0.055 INCHES MAXIMUM IN |
| Fastener Length | 0.503 INCHES MINIMUM AND 0.523 INCHES MAXIMUM IN |
| Shoulder Length | 0.178 INCHES MINIMUM AND 0.198 INCHES MAXIMUM FIRST SHOULDER IN |
| Shoulder Diameter | 0.217 INCHES MINIMUM AND 0.218 INCHES MAXIMUM FIRST SHOULDER IN |
| Thread Length | 0.325 INCHES MINIMUM IN |
| Shoulder Shape | ROUND FIRST SHOULDER |
| Hardness Rating | 35.0 ROCKWELL C NOMINAL OVERALL |
| Material Document and Classification | MIL-S-6758 MIL SPEC 1ST MATERIAL RESPONSE OR MIL-S-6050 MIL SPEC 2ND MATERIAL RESPONSE OR MIL-S-6098 MIL SPEC 3RD MATERIAL RESPONSE OR MIL-S-6049 MIL SPEC 4TH MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.190 INCHES IN |
| Head Style | FLAT CHAMFER |
| Thread Direction | RIGHT-HAND |
| Surface Treatment | CADMIUM OVERALL |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 32 |
| Material | STEEL COMP 4130 OR STEEL COMP 8630 OR STEEL COMP 8735 OR STEEL COMP 8740 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Head Diameter | 0.295 INCHES MINIMUM AND 0.315 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 |
|---|---|
| HL218-6-3 | Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company (USA) |
| HL218-6-3 | Hi-Shear Corporation (USA) |
| HL218-6-3 | Huck International, Inc (USA) |
| BACB30MD6A3 | Sps Technologies, Llc Dba PB Fasteners (USA) |
| HL218-6-3 | Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc (CAN) |
| BACB30MD6A3 | Howmet Global Fastening Systems Inc Div City of Industry Operations (USA) |
| HL218-6-3 | Satair A/s (DNK) |
| HL218-6-3 | West Coast Aerospace, Inc. (USA) |
| HL218-6-3 | Fairchild Fasteners Europe - Vsd Gmbh (DEU) |
| BACB30MD6A3 | Howmet Global Fastening Systems Inc (USA) |
| Reference | Meaning |
|---|---|
| HL218-6-3 | 5/9 Secondary reference U.S. Government activity |
| BACB30KK6-3 | 3/2 Design control — primary reference U.S. Government activity |
| HL218-6-3 | 5/9 Secondary reference Sps Technologies, Llc Dba PB Fasteners |
| 65960-6-3 | 5/9 Secondary reference Sps Technologies, Llc Dba PB Fasteners |
NSN 5306-00-522-1813 is a Bolt,shoulder, manufactured by Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company, classified under FSC 5306, Bolts. Status: active.
NSN 5306-00-522-1813 has 10 manufacturer part numbers on file: HL218-6-3 (Sps Technologies, Llc Dba Air Industries Company Div Air Industries Company), HL218-6-3 (Hi-Shear Corporation), HL218-6-3 (Huck International, Inc), BACB30MD6A3 (Sps Technologies, Llc Dba PB Fasteners), HL218-6-3 (Lisi Aerospace Canada Corp Div Hi Shear Holdings Inc) and 5 more.
Key specifications for HL218-6-3: Head Height: 0.045 INCHES MINIMUM AND 0.055 INCHES MAXIMUM IN; Fastener Length: 0.503 INCHES MINIMUM AND 0.523 INCHES MAXIMUM IN; Shoulder Length: 0.178 INCHES MINIMUM AND 0.198 INCHES MAXIMUM FIRST SHOULDER IN; Shoulder Diameter: 0.217 INCHES MINIMUM AND 0.218 INCHES MAXIMUM FIRST SHOULDER 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.