The Stud,lock Pin Fastener, cataloged under National Stock Number 5325-01-211-4845, is classified within Federal Supply Class 5325 (Fastening Devices) of the Hardware and Abrasives group. The manufacturer of record is Monadnock Company, the Dba Lisi Aerospace. Government technical data includes 6 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5325-01-211-4845 |
| Primary Part Number | BACS21B5FH21 |
| Item Name | Stud,lock Pin Fastener |
| FSC / FSG | 5325 / 53 — Fastening Devices |
| Manufacturer | Monadnock Company, the Dba Lisi Aerospace |
| Status | ACTIVE |
| Surface Treatment Document and Classification | QQ-P-416A,TYPE 2,CLASS 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL A |
| Material Document and Classification | MIL-P-5591 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Stud Body Diameter | 0.265 INCHES NOMINAL IN |
| Surface Treatment | CADMIUM OVERALL |
| Pinhole Diameter | 0.093 INCHES MINIMUM AND 0.096 INCHES MAXIMUM IN |
| Material | STEEL COMP 1010 OVERALL |
| 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 |
|---|---|
| BACS21B5FH21 PRIMARY | Monadnock Company, the Dba Lisi Aerospace (USA) |
| Reference | Meaning |
|---|---|
| BACS21B5FH21 | 7/2 Vendor item drawing reference U.S. Government activity |
NSN 5325-01-211-4845 is a Stud,lock Pin Fastener, manufactured by Monadnock Company, the Dba Lisi Aerospace, classified under FSC 5325, Fastening Devices. Status: active.
NSN 5325-01-211-4845 has 1 manufacturer part number on file: BACS21B5FH21 (Monadnock Company, the Dba Lisi Aerospace).
Key specifications for BACS21B5FH21: Surface Treatment Document and Classification: QQ-P-416A,TYPE 2,CLASS 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL A; Material Document and Classification: MIL-P-5591 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL; Stud Body Diameter: 0.265 INCHES NOMINAL IN; Special Features: FLUSH HEAD,120 DEG COUNTERSUNK. 6 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.