The Fastener,positive Lock, cataloged under National Stock Number 5325-00-855-2948, 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 18 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5325-00-855-2948 |
| Primary Part Number | BACW20A219 |
| Item Name | Fastener,positive Lock |
| FSC / FSG | 5325 / 53 — Fastening Devices |
| Manufacturer | Monadnock Company, the Dba Lisi Aerospace |
| Status | ACTIVE |
| Undercut Length | 0.080 INCHES NOMINAL IN |
| Undercut Diameter | 0.396 INCHES NOMINAL IN |
| Positive Lock Stud Shank Style | STUD SHANK |
| Major Diameter Length | 0.137 INCHES NOMINAL IN |
| Distance From Stud Hole Center to Mounting Hole Center | 0.938 INCHES NOMINAL IN |
| Shoulder Height | 0.062 INCHES NOMINAL IN |
| Distance From Stud Hole Center to Mounting Hole Center Along Length | 1.125 INCHES NOMINAL IN |
| Center to Center Distance Between Mounting Holes Along Width | 1.875 INCHES NOMINAL IN |
| Center to Center Distance Between Mounting Holes Along Length | 2.250 INCHES NOMINAL IN |
| End Overall Length | 0.377 INCHES NOMINAL IN |
| Surface Treatment | CADMIUM STUD |
| Surface Treatment | ANODIZE RECEPTACLE MECHANISM |
| Positive Lock Receptacle Style | RECEPTACLE |
| Material | ALUMINUM ALLOY RECEPTACLE MECHANISM |
| Material | ALUMINUM ALLOY STUD |
| Positive Lock Stud Head Style | STUD HEAD |
| Head Diameter | 0.548 INCHES NOMINAL IN |
| Mounting Hole Type | COUNTERSUNK |
| 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 |
|---|---|
| BACW20A219 | Monadnock Company, the Dba Lisi Aerospace (USA) |
| Reference | Meaning |
|---|---|
| BACW20A219 | 5/2 Secondary reference U.S. Government activity |
| 295306 | 3/9 Design control — primary reference Home Care Industries, Inc. Div Filter Division |
| AR5T5 | 5/9 Secondary reference U.S. Government activity |
| BACW20A219 | 5/9 Secondary reference The Boeing Company |
NSN 5325-00-855-2948 is a Fastener,positive Lock, manufactured by Monadnock Company, the Dba Lisi Aerospace, classified under FSC 5325, Fastening Devices. Status: active.
NSN 5325-00-855-2948 has 1 manufacturer part number on file: BACW20A219 (Monadnock Company, the Dba Lisi Aerospace).
Key specifications for BACW20A219: Undercut Length: 0.080 INCHES NOMINAL IN; Undercut Diameter: 0.396 INCHES NOMINAL IN; Positive Lock Stud Shank Style: STUD SHANK; Major Diameter Length: 0.137 INCHES NOMINAL IN. 18 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.