Topaz Electric 657SI Electrical Metallic Tubing Emt Connectors product image view 2

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657SI

SKU: 657SI

MPN: 657SI

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$17.26 / EA

Available to order

Lead time: over 7 working days

Lead time: over 7 working days
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Single-unit ordering available.

Dale Electric Supply ships electrical products across the U.S. and supports international orders through customer service. Local delivery may be available in defined regional delivery zones, and larger same-manufacturer orders may qualify for factory-direct shipping. Shipping and fulfillment can vary by product, vendor, manufacturer program, stock state, destination, quantity, and quote workflow.

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Hill Electric Supply

Established 1948

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Key specs

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Material: Steel
Size: 2-1/2 IN
Type: Compression EMT Connector

Description

Product overview

2-1/2" Steel Compression Type Connectors with Insulated Throat

Manufacturer highlights

Topazs compression type steel constructed EMT connectors offer ease of use and provide a secure, concrete tight joining of thin wall EMT conduit. Mode...

Topazs compression type steel constructed EMT connectors offer ease of use and provide a secure, concrete tight joining of thin wall EMT conduit. Models with insulated throat provide additional protection against abrasion. Assemblies include a zinc plated steel locknut. All models available in sizes from 1/2 to 4; fabricated from strong, resilient steel with a zinc plated finish to ensure mechanical protection; UL listed. NEMA/ANSI FB-1 compliant.

Compression type connectors and couplings
Concrete tight
Connectors: Assembled with a steel locknut
Connectors: Available with insulated throat

Additional manufacturer notes

Feed description: TPZ 657SI 2-1/2" EMT COMP. CONN. ST
Invoice description: 2-1/2" EMT COMP. CONN. STEEL INS. 12-PK

Specifications

UPC: 751338169012

UNSPSC: 39121434

Country of Origin: MUL

Material: Steel

Size: 2-1/2 IN

Type: Compression EMT Connector

Connection: Threaded x Compression

Connectors (IN): Threaded x Compression IN

Diameter: 3.688 IN

Finish: Zinc Plated

For Use With: Join EMT To Box or Enclosure

Insulation: Insulated Throat

Label Description: EMT CONNECTORS

Length: 3.875 IN

Material: Steel

Size: 2-1/2 IN

Size (IN): 2-1/2" IN

Size (trade) (IN): 2-1/2" IN

Standard: UL 514B, UL File Number E148716, US Federal Specification Number A-A-50553, CSA Certified, NEMA/ANSI FB-1, Military Specification:W-F-406D, W-F-406E, W-F-408D, W-S-610D

Thread Length: 0.750 IN

Type: Compression EMT Connector

Manufacturer keywords: 2-1/2" COMP. CONN. STEEL INS.

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3/4" Steel Set Screw Type Connector

$0.60 / EA

Available to order

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Specification comparison

Scan the attributes that differ across these alternatives.

821RT View key specs

SKU: 821RT
Price: $2.37 / EA
Availability: 12 available
Color: Silver
Connection: —
Connectors (IN): —
Diameter: —
Finish: —
For Use With: —

View full product details

820RT View key specs

SKU: 820RT
Price: $1.70 / EA
Availability: 22 available
Color: Silver
Connection: —
Connectors (IN): —
Diameter: —
Finish: —
For Use With: —

View full product details

657SRT View key specs

SKU: 657SRT
Price: $19.60 / EA
Availability: Available to order
Color: —
Connection: Threaded x Compression
Connectors (IN): Threaded x Compression IN
Diameter: 1.562 IN
Finish: Zinc Plated
For Use With: Join EMT To Box or Enclosure

View full product details

658SRT View key specs

SKU: 658SRT
Price: $26.53 / EA
Availability: Available to order
Color: —
Connection: Threaded x Compression
Connectors (IN): Threaded x Compression IN
Diameter: 1.562 IN
Finish: Zinc Plated
For Use With: Join EMT To Box or Enclosure

View full product details

631I View key specs

SKU: 631I
Price: $0.70 / EA
Availability: Available to order
Color: —
Connection: Threaded x Set Screw
Connectors (IN): —
Diameter: 1.06 IN
Finish: —
For Use With: Join EMT To Box or Enclosure

View full product details

632S View key specs

SKU: 632S
Price: $0.60 / EA
Availability: Available to order
Color: —
Connection: Threaded x Set Screw
Connectors (IN): Threaded x Set Screw IN
Diameter: 1.313 IN
Finish: Zinc Plated
For Use With: Join EMT To Box or Enclosure

View full product details

Attribute	821RT Steel EMT compression connector. concrete tight and rain tight. Trade Size 3/4".	820RT Steel EMT compression connector. concrete tight and rain tight. Trade Size 1/2".	657SRT 2-1/2" Steel Raintight Compression Type Connectors & Couplings	658SRT 3" Steel Raintight Compression Type Connector	631I 1/2 IN EMT CONNECTORS - SET SCREW TYPE - ZINC INSULATED THROAT	632S 3/4" Steel Set Screw Type Connector
Price	$2.37 / EA	$1.70 / EA	$19.60 / EA	$26.53 / EA	$0.70 / EA	$0.60 / EA
Availability	12 available	22 available	Available to order	Available to order	Available to order	Available to order
Color	Silver	Silver	—	—	—	—
Connection	—	—	Threaded x Compression	Threaded x Compression	Threaded x Set Screw	Threaded x Set Screw
Connectors (IN)	—	—	Threaded x Compression IN	Threaded x Compression IN	—	Threaded x Set Screw IN
Diameter	—	—	1.562 IN	1.562 IN	1.06 IN	1.313 IN
Finish	—	—	Zinc Plated	Zinc Plated	—	Zinc Plated
For Use With	—	—	Join EMT To Box or Enclosure	Join EMT To Box or Enclosure	Join EMT To Box or Enclosure	Join EMT To Box or Enclosure
Insulation	—	—	None	None	Insulated Throat	None
Label Description	—	—	EMT CONNECTORS	EMT CONNECTOR	—	EMT CONNECTORS
Length	—	—	1.968 IN	2.689 IN	1.16 IN	1.531 IN
Material	Steel	Steel	Steel	Steel	Die Cast Zinc	Steel
Size	L(1.657) x W(1.375) x H(1.375) IN	L(1.608) x W(1.125) x H(1.125) IN	2-1/2 IN	3 IN	1/2 IN	3/4 IN
Size (IN)	—	—	2 1/2" IN	3" IN	—	3/4" IN
Size (trade) (IN)	—	—	2-1/2" IN	3" IN	—	3/4" IN
Standard	CULUS	CULUS	UL 514B, UL File Number E170258, US Federal Specification Number A-A-50553, CSA Certified, NEMA/ANSI FB-1, Military Specification:W-F-406D, W-F-406E, W-F-408D, W-S-610D	UL 514B, UL File Number E170258, US Federal Specification Number A-A-50553, CSA Certified, NEMA/ANSI FB-1, Military Specification:W-F-406D, W-F-406E, W-F-408D, W-S-610D	UL 514B, UL File Number E18472, US Federal Specification Number A-A-50553, CSA Certified, NEMA/ANSI FB-1, Military Specification:W-F-406D, W-F-406E, W-F-408D, W-S-610D	UL 514B, UL File Number E148720, US Federal Specification Number A-A-50553, CSA Certified, NEMA/ANSI FB-1, Military Specification:W-F-406D, W-F-406E, W-F-408D, W-S-610D
Thread Length	—	—	3.625 IN	4.250 IN	0.400 IN	0.438 IN
Type	—	—	Compression EMT Connector	Compression EMT Connector	Set Screw EMT Connector	Set Screw EMT Connector

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657SI

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Key specs

Description

Product overview

Manufacturer highlights

Additional manufacturer notes

Specifications

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Similar items

821RT

820RT

657SRT

658SRT

631I

632S

Specification comparison