The Insert,screw Thread, cataloged under National Stock Number 5325-01-083-5551, is classified within Federal Supply Class 5325 (Fastening Devices) of the Hardware and Abrasives group. The manufacturer of record is Qioptiq Ltd. Government technical data includes 10 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. 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 | 5325-01-083-5551 |
| Primary Part Number | 015521 |
| Item Name | Insert,screw Thread |
| FSC / FSG | 5325 / 53 — Fastening Devices |
| Manufacturer | Qioptiq Ltd |
| Status | ACTIVE |
| Length | 0.615 INCHES NOMINAL IN |
| Fin Width | 0.125 INCHES NOMINAL IN |
| Fin Diameter | 0.730 INCHES NOMINAL IN |
| Insert Size | 0.345 |
| Style Designator | SLOTTED |
| Nominal Thread Size | 0.250 INCHES IN |
| Slot Depth | 0.420 INCHES NOMINAL IN |
| Surface Treatment | OXIDE OVERALL |
| Distance From Fin to Insert Head | 0.195 INCHES NOMINAL IN |
| Slot Width | 0.290 INCHES MINIMUM AND 0.310 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 |
|---|---|
| 015521 PRIMARY | Qioptiq Ltd (GBR) |
NSN 5325-01-083-5551 is a Insert,screw Thread, manufactured by Qioptiq Ltd, classified under FSC 5325, Fastening Devices. Status: active.
NSN 5325-01-083-5551 has 1 manufacturer part number on file: 015521 (Qioptiq Ltd).
1 possible match (shared part number, not a government interchangeability claim): 5330-01-548-1186. Verify interchangeability with system specifications before substitution.
Key specifications for 015521: Length: 0.615 INCHES NOMINAL IN; Fin Width: 0.125 INCHES NOMINAL IN; Fin Diameter: 0.730 INCHES NOMINAL IN; Insert Size: 0.345. 10 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.