The Nut,self-Locking,plate, cataloged under National Stock Number 5310-01-121-5526, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Monadnock Company, the Dba Lisi Aerospace. Government technical data includes 24 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-121-5526 |
| Primary Part Number | BACN10TL3A20 |
| Item Name | Nut,self-Locking,plate |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Monadnock Company, the Dba Lisi Aerospace |
| Status | ACTIVE |
| Plate Thickness | 0.050 INCHES MINIMUM AND 0.070 INCHES MAXIMUM IN |
| Nut Length | 0.975 INCHES MINIMUM AND 0.995 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | MIL-A-8625,TY 1 MIL SPEC 1ST TREATMENT RESPONSE OR MIL-C-5541 MIL SPEC 2ND TREATMENT RESPONSE OVERALL EXCEPT INSERT |
| Surface Treatment Document and Classification | QQ-P-416,TY 2 FED SPEC SINGLE TREATMENT RESPONSE LOCKING INSERT |
| Thread Series | UNF |
| Plate Width | 0.386 INCHES MINIMUM AND 0.406 INCHES MAXIMUM IN |
| Mounting Hole Arrangement Style | 2 HOLES |
| Material Document and Classification | 66 ASSN STD SINGLE MATERIAL RESPONSE LOCKING INSERT |
| Material Document and Classification | MIL-A-12545,T6 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL EXCEPT INSERT |
| Mounting Hole Diameter | 0.128 INCHES MINIMUM AND 0.135 INCHES MAXIMUM IN |
| Thread Direction | RIGHT-HAND |
| Nominal Thread Size | 0.190 INCHES IN |
| Distance From Aperture Center to Mounting Hole Center | 0.344 INCHES NOMINAL IN |
| Locking Feature | PREVAILING TORQUE WITH METALLIC INSERT |
| Center to Center Distance Between Mounting Holes Along Length | 0.686 INCHES MINIMUM AND 0.690 INCHES MAXIMUM IN |
| Nut Height | 1.980 INCHES MINIMUM AND 2.020 INCHES MAXIMUM IN |
| Surface Treatment | ANODIZE OR CHROMATE OVERALL EXCEPT INSERT |
| Surface Treatment | CADMIUM AND CHROMATE LOCKING INSERT |
| Nut Style | PLATE |
| Thread Class | 2B |
| Thread Quantity Per Inch | 32 |
| Material | STEEL COMP 304 LOCKING INSERT |
| Material | ALUMINUM ALLOY 6061 OVERALL EXCEPT INSERT |
| Nut Mounting Provision | STRAIGHT HOLES |
| 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 |
|---|---|
| BACN10TL3A20 | Monadnock Company, the Dba Lisi Aerospace (USA) |
| BACN10TL3A20 | Hartwell Corporation (USA) |
| Reference | Meaning |
|---|---|
| BACN10TL3A20 | 3/2 Design control — primary reference U.S. Government activity |
| WSI-4A20 | 5/9 Secondary reference Atlas Corp Western Sky Industries Div |
NSN 5310-01-121-5526 is a Nut,self-Locking,plate, manufactured by Monadnock Company, the Dba Lisi Aerospace, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-121-5526 has 2 manufacturer part numbers on file: BACN10TL3A20 (Monadnock Company, the Dba Lisi Aerospace), BACN10TL3A20 (Hartwell Corporation).
Key specifications for BACN10TL3A20: Plate Thickness: 0.050 INCHES MINIMUM AND 0.070 INCHES MAXIMUM IN; Nut Length: 0.975 INCHES MINIMUM AND 0.995 INCHES MAXIMUM IN; Surface Treatment Document and Classification: MIL-A-8625,TY 1 MIL SPEC 1ST TREATMENT RESPONSE OR MIL-C-5541 MIL SPEC 2ND TREATMENT RESPONSE OVERALL EXCEPT INSERT; Surface Treatment Document and Classification: QQ-P-416,TY 2 FED SPEC SINGLE TREATMENT RESPONSE LOCKING INSERT. 24 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.