The Lock Spring,turnlock Fastener, cataloged under National Stock Number 5325-00-677-5749, is classified within Federal Supply Class 5325 (Fastening Devices) of the Hardware and Abrasives group. Government technical data includes 7 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government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 | 5325-00-677-5749 |
| Item Name | Lock Spring,turnlock Fastener |
| FSC / FSG | 5325 / 53 — Fastening Devices |
| Status | ACTIVE |
| Center to Center Distance Between Eyes | 0.750 INCHES NOMINAL IN |
| Eye Diameter | 0.093 INCHES NOMINAL IN |
| Lockspring Overall Height | 0.250 INCHES NOMINAL IN |
| Stock Diameter | 0.062 INCHES NOMINAL IN |
| Surface Treatment | CADMIUM OVERALL |
| Material | STEEL OVERALL |
| Lockspring Style | LOCKSPRING |
| 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 |
|---|---|
| S4-125 | 3/9 Design control — primary reference Southco Inc |
NSN 5325-00-677-5749 is a Lock Spring,turnlock Fastener, classified under FSC 5325, Fastening Devices. Status: active.
3 possible matches (shared part number, not a government interchangeability claim): 4130-01-158-7031, 4510-01-327-7785, 8115-01-662-0670. Verify interchangeability with system specifications before substitution.
Key specifications for 5325-00-677-5749: Center to Center Distance Between Eyes: 0.750 INCHES NOMINAL IN; Eye Diameter: 0.093 INCHES NOMINAL IN; Lockspring Overall Height: 0.250 INCHES NOMINAL IN; Stock Diameter: 0.062 INCHES NOMINAL IN. 7 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.