The Retainer,fastener, cataloged under National Stock Number 5325-00-390-0763, is classified within Federal Supply Class 5325 (Fastening Devices) of the Hardware and Abrasives group. The manufacturer of record is Fastener Innovation Technology, Inc. Dba F I T. Government technical data includes 1 specification, cited from the U.S. Government catalog. The record lists 4 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5325-00-390-0763 |
| Primary Part Number | ST3M587-2 |
| Item Name | Retainer,fastener |
| FSC / FSG | 5325 / 53 — Fastening Devices |
| Manufacturer | Fastener Innovation Technology, Inc. Dba F I T |
| Status | ACTIVE |
| General Characteristics Item Description | CRES,PASSIVATED,0.531 IN. LG,0.515 IN. OD FLANGE,3/8-24 UNF 3A THD,0.188 IN. TO 0.312 IN. THK PANEL ACCOMMODATED A |
| 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 |
|---|---|
| CSR503-2 | Fastener Innovation Technology, Inc. Dba F I T (USA) |
| CA30024-4-2 | Howmet Global Fastening Systems Inc. Div Tridair Products (USA) |
| ST3M587-2 PRIMARY | Fastener Innovation Technology, Inc. Dba F I T (USA) |
| ST3M587-2 PRIMARY | Howmet Global Fastening Systems Inc. Div Tridair Products (USA) |
| Reference | Meaning |
|---|---|
| ST3M587-2 | 7/2 Vendor item drawing reference The Boeing Company Div Defense |
NSN 5325-00-390-0763 is a Retainer,fastener, manufactured by Fastener Innovation Technology, Inc. Dba F I T, classified under FSC 5325, Fastening Devices. Status: active.
NSN 5325-00-390-0763 has 4 manufacturer part numbers on file: CSR503-2 (Fastener Innovation Technology, Inc. Dba F I T), CA30024-4-2 (Howmet Global Fastening Systems Inc. Div Tridair Products), ST3M587-2 (Fastener Innovation Technology, Inc. Dba F I T), ST3M587-2 (Howmet Global Fastening Systems Inc. Div Tridair Products).
1 possible match (shared part number, not a government interchangeability claim): 5305-01-447-5716. Verify interchangeability with system specifications before substitution.
Key specifications for ST3M587-2: General Characteristics Item Description: CRES,PASSIVATED,0.531 IN. LG,0.515 IN. OD FLANGE,3/8-24 UNF 3A THD,0.188 IN. TO 0.312 IN. THK PANEL ACCOMMODATED A. 1 specification is 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.