The Junction Box, cataloged under National Stock Number 5975-01-529-1525, is classified within Federal Supply Class 5975 (Electrical Hardware and Supplies) of the Electrical and Electronic Equipment Components group. The manufacturer of record is Meltric Corporation. Government technical data includes 11 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 | 5975-01-529-1525 |
| Primary Part Number | MB31 |
| Item Name | Junction Box |
| FSC / FSG | 5975 / 59 — Electrical Hardware and Supplies |
| Manufacturer | Meltric Corporation |
| Status | ACTIVE |
| Surface Treatment Document and Classification | DUPONT P/N: PFH50955, ASA-41 P GRAY OR EQUIVALENT MFR REF SINGLE TREATMENT RESPONSE OVERALL |
| Cover Mounting Hole Quantity | 4 |
| Inside Depth | 2.500 INCHES NOMINAL IN |
| Body Width | 3.000 INCHES NOMINAL IN |
| Style Designator | RECTANGULAR-SQUARE CORNER BOX |
| Entrance Quantity | 1 |
| Body Length | 4.500 INCHES NOMINAL IN |
| Cover Attachment Method | SCREW |
| Surface Treatment | POWDER COATED OVERALL |
| Material | ALUMINUM OVERALL |
| Entrance Diameter | 1.156 INCHES ONE SIDE IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| MB31 PRIMARY | Meltric Corporation (USA) |
NSN 5975-01-529-1525 is a Junction Box, manufactured by Meltric Corporation, classified under FSC 5975, Electrical Hardware and Supplies. Status: active.
NSN 5975-01-529-1525 has 1 manufacturer part number on file: MB31 (Meltric Corporation).
1 possible match (shared part number, not a government interchangeability claim): 5310-01-679-4026. Verify interchangeability with system specifications before substitution.
Key specifications for MB31: Surface Treatment Document and Classification: DUPONT P/N: PFH50955, ASA-41 P GRAY OR EQUIVALENT MFR REF SINGLE TREATMENT RESPONSE OVERALL; Cover Mounting Hole Quantity: 4; Inside Depth: 2.500 INCHES NOMINAL IN; Body Width: 3.000 INCHES NOMINAL IN. 11 specifications are documented in the U.S. Government catalog.
Possible hazard — SDS may be required (DLA HMIC P). 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.