The Bolt,eye, cataloged under National Stock Number 5306-00-272-2138, is classified within Federal Supply Class 5306 (Bolts) of the Hardware and Abrasives group. The manufacturer of record is Century Metal Parts Corp. Government technical data includes 14 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5306-00-272-2138 |
| Primary Part Number | 00640 |
| Item Name | Bolt,eye |
| FSC / FSG | 5306 / 53 — Bolts |
| Manufacturer | Century Metal Parts Corp |
| Status | ACTIVE |
| Eye Stock Diameter | 0.375 INCHES NOMINAL IN |
| Thread Length | 0.937 INCHES MINIMUM IN |
| Shank Length | 1.000 INCHES NOMINAL IN |
| Style Designator | ROUND, CLOSED W/SHOULDER |
| Nominal Thread Diameter | 0.375 INCHES IN |
| Thread Direction | RIGHT-HAND |
| Shoulder Diameter | 0.875 INCHES NOMINAL IN |
| Shoulder Thickness | 0.250 INCHES NOMINAL IN |
| Eye Inside Diameter | 1.375 INCHES NOMINAL IN |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 16 |
| Material | STEEL COMP 1022 OR STEEL COMP 8620 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Eye Outside Width | 2.125 INCHES NOMINAL 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 |
|---|---|
| 00640 PRIMARY | Century Metal Parts Corp (USA) |
| Reference | Meaning |
|---|---|
| 3-8X16X34LG | 5/1 Secondary reference Siemens Energy, Inc. |
| 00640 | 7/2 Vendor item drawing reference Defense Logistics Agency Dba Defense Supply Center Philadelphia |
| 3-8X16X34LG | C/1 Advisory reference — outside the item-of-supply concept Zf Industrieantriebe Witten Gmbh |
NSN 5306-00-272-2138 is a Bolt,eye, manufactured by Century Metal Parts Corp, classified under FSC 5306, Bolts. Status: active.
NSN 5306-00-272-2138 has 1 manufacturer part number on file: 00640 (Century Metal Parts Corp).
1 possible match (shared part number, not a government interchangeability claim): 6505-01-242-8352. Verify interchangeability with system specifications before substitution.
Key specifications for 00640: Eye Stock Diameter: 0.375 INCHES NOMINAL IN; Thread Length: 0.937 INCHES MINIMUM IN; Shank Length: 1.000 INCHES NOMINAL IN; Style Designator: ROUND, CLOSED W/SHOULDER. 14 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.