PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

C50Protector,telephone

At and T Corp · NSN 5920-00-665-2885 · FSC 5920 · No Item Name Available
Verified by PartsTable
NSN 5920-00-665-2885 — this item is cataloged by the U.S. Government under National Stock Number 5920-00-665-2885. Primary manufacturer part number: C50.
Features
  • Protector,telephone — FSC 5920
  • Protective Component Quantity: 100
  • Wire Quantity: 50
  • Protective Component Name: HEAT COIL,PROTECTOR BLOCK,PROTECTOR BLOCK
  • Usage Design: FOR SUB-STATION USE
  • Accessory Controlling Agency: WESTERN ELECTRIC CO.,WESTERN ELECTRIC CO.,WESTERN ELECTRIC CO.
  • Mounting Configuration: 3 MTG SLOTS 9/16 IN. LG BY 5/16 IN. W ON 7-1/2 IN. CENTER IN
  • Accessory Identifying Number: 76A PART NO. AND 28 PART NO. AND 29 PART NO. A
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Protector,telephone, cataloged under National Stock Number 5920-00-665-2885, is classified within Federal Supply Class 5920 (No Item Name Available) of the Electrical and Electronic Equipment Components group. The primary manufacturer of record is At and T Corp. Government technical data includes 7 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 3 commercial cross-references from 3 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN5920-00-665-2885
Primary Part NumberC50
Item NameProtector,telephone
FSC / FSG5920 / 59 — No Item Name Available
ManufacturerAt and T Corp
StatusCANCELLED
Protective Component Quantity100
Wire Quantity50
Protective Component NameHEAT COIL,PROTECTOR BLOCK,PROTECTOR BLOCK
Usage DesignFOR SUB-STATION USE
Accessory Controlling AgencyWESTERN ELECTRIC CO.,WESTERN ELECTRIC CO.,WESTERN ELECTRIC CO.
Mounting Configuration3 MTG SLOTS 9/16 IN. LG BY 5/16 IN. W ON 7-1/2 IN. CENTER IN
Accessory Identifying Number76A PART NO. AND 28 PART NO. AND 29 PART NO. A
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 12
3040-00-027-0344C50 INTERCHANGEABLE
Clamp,hub
Designatronics Incorporated Div Sterling Instruments Div
4730-00-126-791730 INTERCHANGEABLE
Nipple,tube
Western Enterprises Div of Scott and Fetzer Co
5315-00-276-4460104316 INTERCHANGEABLE
Pin,straight,headed
Garwood/feller Inc Garwood Winch Div
5940-00-367-5339810 971 INTERCHANGEABLE
Ferrule,electrical Conductor
General Motors Corp
5975-00-839-5289 INTERCHANGEABLE
Conduit Outlet
5610-00-926-45620534XX INTERCHANGEABLE
Plaster,patching,gypsum
Red Devil Inc
3040-01-012-5404500-574 INTERCHANGEABLE
Cylinder Assembly,actuating,line
Layton Manufacturing Co.
4940-01-013-1985 INTERCHANGEABLE
Cable,premium,sewer Machine
4730-01-199-3584 INTERCHANGEABLE
Cap Protective
5340-01-205-5773C-50 INTERCHANGEABLE
Cap,protective,dust and Moisture
Bromma, Inc.
Cross-Reference Index
Part NumberManufacturer
C50 At and T Corp (USA)
C50 Lucent Technologies Inc Corporate Headquarters (USA)
C50 American Telephone and Telegraph Co (USA)
Related Parts
3040-00-027-0344INTERCHANGEABLE
CLAMP,HUB
C50
4730-00-126-7917INTERCHANGEABLE
NIPPLE,TUBE
30
5315-00-276-4460INTERCHANGEABLE
PIN,STRAIGHT,HEADED
104316
5940-00-367-5339INTERCHANGEABLE
FERRULE,ELECTRICAL CONDUCTOR
810 971
5975-00-839-5289INTERCHANGEABLE
CONDUIT OUTLET
5610-00-926-4562INTERCHANGEABLE
PLASTER,PATCHING,GYPSUM
0534XX
3040-01-012-5404INTERCHANGEABLE
CYLINDER ASSEMBLY,ACTUATING,LINE
500-574
4940-01-013-1985INTERCHANGEABLE
CABLE,PREMIUM,SEWER MACHINE
4730-01-199-3584INTERCHANGEABLE
CAP PROTECTIVE
5340-01-205-5773INTERCHANGEABLE
CAP,PROTECTIVE,DUST AND MOISTURE
C-50
7520-01-316-0361INTERCHANGEABLE
RACK,DISTRIBUTOR,DESK
C61
3130-01-336-0034INTERCHANGEABLE
BEARING UNIT,BALL

Frequently Asked Questions

What is NSN 5920-00-665-2885?

NSN 5920-00-665-2885 is a Protector,telephone, manufactured by At and T Corp, classified under FSC 5920 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 5920-00-665-2885?

NSN 5920-00-665-2885 has 3 cross-referenced part numbers: C50 (At and T Corp), C50 (Lucent Technologies Inc Corporate Headquarters), C50 (American Telephone and Telegraph Co).

What NSN replaces 5920-00-665-2885?

There are 12 known substitutes for 5920-00-665-2885: 3040-00-027-0344, 4730-00-126-7917, 5315-00-276-4460 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of C50?

Key specifications for C50: Overall Depth: 1.900 INCHES NOMINAL IN; Protective Component Quantity: 100; Wire Quantity: 50; Protective Component Name: HEAT COIL,PROTECTOR BLOCK,PROTECTOR BLOCK. 10 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5920-00-665-2885 still in active supply?

NSN 5920-00-665-2885 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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