The Bolt,eye, cataloged under National Stock Number 5306-00-071-3221, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. Government technical data includes 12 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-00-071-3221 |
| Item Name | Bolt,eye |
| FSC / FSG | 5306 / 53 — Bolts |
| Status | ACTIVE |
| Eye Stock Diameter | 0.906 INCHES NOMINAL IN |
| Thread Length | 2.250 INCHES NOMINAL IN |
| Shank Length | 2.250 INCHES NOMINAL IN |
| Style Designator | ROUND, CLOSED |
| Nominal Thread Diameter | 1.000 INCHES IN |
| Thread Direction | RIGHT-HAND |
| Distance From Center of Eye to Shank End | 3.750 INCHES NOMINAL IN |
| Eye Inside Diameter | 1.750 INCHES NOMINAL IN |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 8 |
| Material | STEEL OVERALL |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| D1104 | 3/9 Design control — primary reference Mkt Geotechnical Systems |
NSN 5306-00-071-3221 is a Bolt,eye, classified under FSC 5306, Bolts. Status: active.
3 possible matches (shared part number, not a government interchangeability claim): 4810-01-220-9532, 5360-01-620-9520, 4820-01-658-3463. Verify interchangeability with system specifications before substitution.
Key specifications for 5306-00-071-3221: Eye Stock Diameter: 0.906 INCHES NOMINAL IN; Thread Length: 2.250 INCHES NOMINAL IN; Shank Length: 2.250 INCHES NOMINAL IN; Style Designator: ROUND, CLOSED. 12 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.