Model # 2192BC 677 SQ U BOLT ZN

Internet #204660110

National Hardware #677-3/8 in. x 4 in. x 7 in. Zinc-Plated U Bolt Plate with Hex Nut

Discontinued National Hardware

#677-3/8 in. x 4 in. x 7 in. Zinc-Plated U Bolt Plate with Hex Nut

store icon Loading Buying Options...
package icon Loading Buying Options...
Sorry, but we ran into issues loading these options. Please try refreshing.

Frequently Bought Together

Product Overview

Whether for home, farm, builder or industrial customers, National has all the right hardware in the sizes and finishes you need. With over a century of service National is committed to maintaining the highest level of product quality, innovation and manufacturing technology. Providing latching and fastening options for all of your indoor and outdoor uses. Thanks to a proprietary WeatherGuard finish, Zinc-Plated eye, U-bolts and turnbuckles last three times longer than the competition. Continued expansion of stainless steel bolts, including heavy-duty applications, put us well ahead of the competitors. Zinc plating offers corrosion resistance for all of your functional hardware needs.

  • Manufactured from steel wire
  • Designed for securing various products to rectangular wood and metal objects
  • Plates are required use National's #2191 plates
  • Nuts included
  • WeatherGuard finish for superior corrosion resistance
  • Zinc plated
  • Life span limited lifetime warranty



Assembled Depth (in.)
4.08 in
Assembled Height (in.)
7.33 in
Assembled Width (in.)
.38 in
Fastener length (in.)
Head diameter (in.)


ACQ Rated Fastener
Fastener Plating
Stainless Steel
Fastener Thread Type
Fastener Type
Fastener/Connector Material
Measurement Standard
Package Quantity
Product Weight (lb.)

Warranty / Certifications

Manufacturer Warranty
LifeSpan Limited Lifetime Warranty

More Products With These Features


Customer Questions & Answers

Does this come with the u bolt, plate, and nuts?

Asked by: Zac
It comes with the nuts and plate. I just bought them this week.
Answered by: cstew
Date published: 2016-06-29

Is the 4 in. dimension from inside thread to inside thread? Need it to wrap behind a 4x4 post.

Asked by: Cheron
according to the technical drawing this square u bolt is 4.08" on the inside width. Please check your facts before answering a question. The 7.33" length represents an overall length, fyi
Answered by: pwhart
Date published: 2016-12-07

what is the maximum temperature this ZINC-PLATED U BOLT PLATE WITH HEX NUT can take without melting?

I'm considering using this in a pizza oven and need to understand the heat tolerence
Asked by: bob65amps
The melting point of steel is 2500 degrees F. The zinc coating will likely melt around 780 deg F.
Answered by: NationalHardware
Date published: 2016-06-19
  • y_2017, m_7, d_25, h_1CST
  • bvseo_bulk, prod_bvqa, vn_bulk_1.0.0-hotfix-1
  • cp_1, bvpage1
  • co_hasquestionsanswers, tq_3
  • loc_, sid_204660110, prod, sort_[SortEntry(order=NUM_ANSWERS, direction=DESCENDING), SortEntry(order=SUBMISSION_TIME, direction=DESCENDING), SortEntry(order=LAST_APPROVED_ANSWER_SUBMISSION_TIME, direction=DESCENDING), SortEntry(order=LAST_APPROVED_ANSWER_SUBMISSION_TIME, direction=DESCENDING), SortEntry(order=BEST_ANSWER_FEEDBACK_COUNT, direction=DESCENDING), SortEntry(order=POSITIVE_ANSWER_FEEDBACK_COUNT, direction=DESCENDING), SortEntry(order=NUM_ANSWERS, direction=DESCENDING)]
  • clientName_homedepot
  • bvseo_sdk, java_sdk, bvseo-3.1.1
  • CLOUD, getContent, 17ms

Customer Reviews

#677-3/8 in. x 4 in. x 7 in. Zinc-Plated U Bolt Plate with Hex Nut is rated 4.5 out of 5 by 2.
Rated 5 out of 5 by from Great for 4" RV Bumper This fits my 2007 Rockland Ultralight RV bumper perfectly. Allows me to attach a receiver to mount a bike rack. No cutting or drilling needed.
Date published: 2016-07-05
Rated 4 out of 5 by from 3/8 in. x 4 in. x 7 in. Zinc-Plated U Bolt Plate with Hex Nut I cut this 3/8 in. x 4 in. x 7 in. Zinc-Plated U Bolt Plate with Hex Nut in half and it worked perfectly to attach a sacrificial board to my table saw. I could not find a 3/8 in. x 4 in. x 7 in. square-shaped U Bolt in any stores, but Home Depot had it on line.
Date published: 2014-07-01
  • y_2017, m_7, d_25, h_3
  • bvseo_bulk, prod_bvrr, vn_bulk_1.0.0-hotfix-1
  • cp_1, bvpage1
  • co_hasreviews, tv_0, tr_2
  • loc_, sid_204660110, prod, sort_[SortEntry(order=RELEVANCE, direction=DESCENDING)]
  • clientName_homedepot
  • bvseo_sdk, java_sdk, bvseo-3.1.1
  • CLOUD, getContent, 29ms