The Eyelet,metallic, cataloged under National Stock Number 5325-01-512-4731, is classified within Federal Supply Class 5325 (Fastening Devices) of the Hardware and Abrasives group. The manufacturer of record is International Eyelets Inc. Government technical data includes 9 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5325-01-512-4731 |
| Primary Part Number | R1521BT |
| Item Name | Eyelet,metallic |
| FSC / FSG | 5325 / 53 — Fastening Devices |
| Manufacturer | International Eyelets Inc |
| Status | ACTIVE |
| Surface Treatment Document and Classification | MIL-T-10727A TYPE 1 MIL SPEC 2ND TREATMENT RESPONSE OVERALL A |
| Flange Outside Diameter | 0.244 INCHES MINIMUM AND 0.248 INCHES MAXIMUM IN |
| Material Document and Classification | QQB-613B COMP 2 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Surface Treatment | TIN OVERALL |
| Barrel Outside Diameter | 0.150 INCHES MINIMUM AND 0.154 INCHES MAXIMUM IN |
| Material | COPPER ALLOY OVERALL |
| Flange Style | FLANGE |
| Barrel Style | STRAIGHT ROUND TYPE |
| Barrel Height | 0.216 INCHES MINIMUM AND 0.222 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 |
|---|---|
| R1521BT PRIMARY | International Eyelets Inc (USA) |
NSN 5325-01-512-4731 is a Eyelet,metallic, manufactured by International Eyelets Inc, classified under FSC 5325, Fastening Devices. Status: active.
NSN 5325-01-512-4731 has 1 manufacturer part number on file: R1521BT (International Eyelets Inc).
Key specifications for R1521BT: Surface Treatment Document and Classification: MIL-T-10727A TYPE 1 MIL SPEC 2ND TREATMENT RESPONSE OVERALL A; Flange Outside Diameter: 0.244 INCHES MINIMUM AND 0.248 INCHES MAXIMUM IN; Material Document and Classification: QQB-613B COMP 2 FED SPEC SINGLE MATERIAL RESPONSE OVERALL; Special Features: TIN PLATED BRASS ELECTRONIC EYELET. 9 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.