Tamperproof One Way Bolt Set - Y4900 and Y4901, Mounting Hardware by SafetySign.com

Tamperproof One Way Bolt Set

Use with any U-channel and Fiberglass Posts

Tamperproof One Way Bolt Set
Item #
Y4900TS

Size:

Material:

Laminate:

Mounting:

Packaging:

Pkgs
Each
Per Bolt Set
1+
3.75
(1.88/ea)
Price: 3.75
0 In Stock
Special freight arrangements are necessary. Learn More.

Need a quote for a large order? Call 800-274-6271 or email us.

Tamperproof One Way Bolt Sets are an ideal solution for helping to prevent theft of traffic, parking and property signs. Each set contains two 5/16” diameter one-way bolts, two breakaway nuts, two zinc coated washers, and two nylon washers for the sign face. These bolts can be used to mount signs with 3/8” mounting holes on U-Channel posts, composite posts, and square posts. 2" bolts are required for 1.12 lbs./ft. U-Channel posts and our composite fiberglass posts. 2-1/2" bolts are required for 1-3/4” square posts and 2 lbs./ft. U-channel posts with or without the addition of our sign saver plates. 3” bolts are required to mount signs on 2” square posts. A 5/8" socket and ratchet wrench will be needed to tighten the breakaway nuts down until they shear.

Product Information

Details

5/16″ Tamperproof Bolt Set

Tamperproof one-way bolts are an affordable solution for securing your signs and helping to prevent theft of your traffic, parking, and property signs. The unique design of the bolt head and breakaway nuts allows both the bolts and nuts to be installed while making them almost impossible to remove without cutting tools.

What size bolts should I use with my U-Channel post?

Post Size Recommended Bolt Size to Mount 1 Sign
with Sign Saver Plates
Recommended Bolt Size to Mount 2 Signs
Back-to-Back with Sign Saver Plates
4 ft. U-Channel Post (2 lbs./ft.) 5/16″ × 2½″ 5/16″ × 2½″
6 ft. U-Channel Post (1.12 lbs./ft.) 5/16″ × 2″ 5/16″ × 2″
6 ft. U-Channel Post (2 lbs./ft.) 5/16″ × 2½″ 5/16″ × 2½″
8 ft. U-Channel Post (2 lbs./ft.) 5/16″ × 2½″ 5/16″ × 2½″
10 ft. U-Channel Post (2 lbs./ft.) 5/16″ × 2½″ 5/16″ × 2½″
12 ft. U-Channel Post (2 lbs./ft.) 5/16″ × 2½″ 5/16″ × 2½″

What size bolts should I use with my square post?

Post Size Recommended Bolt Size to Mount 1 Sign Recommended Bolt Size to Mount 2 Signs Back-to-Back
6 ft. × 1¾″ Square Post 5/16″ × 2½″ 5/16″ × 2½″
8 ft. × 1¾″ Square Post 5/16″ × 2½″ 5/16″ × 2½″
8 ft. × 2″ Square Post 5/16″ × 3″ 5/16″ × 3″
10 ft. × 1¾″ Square Post 5/16″ × 2½″ 5/16″ × 2½″
10 ft. × 2″ Square Post 5/16″ × 3″ 5/16″ × 3″

What size bolts should I use with my fiberglass composite post?

Post Size Recommended Bolt Size to Mount 1 Sign Recommended Bolt Size to Mount 2 Signs Back-to-Back
7 ft. Fiberglass Post 5/16″ × 2″ 5/16″ × 2″
8 ft. Fiberglass Post 5/16″ × 2″ 5/16″ × 2″

Installing Tamperproof Bolts

Tools required
Our Y4965 screwdriver with for one-way bolts
⅝″ socket and ratchet wrench

Installation instructions:

  1. Place the sign on the square post where it meets your height requirement and line up the mounting holes with the holes on the post.
  2. Using our Y4901TS or Y3551 bolt sets, insert a washer over the 5/16″ bolts and then insert the bolts into the mounting holes of the sign and through the post.
  3. Insert a washer on the other end of the bolt followed by the breakaway nut with the cone end facing the post.
  4. Tighten the nut down until it shears from the cone.
Optional
Add a pair of our ribbed sign saver plates that prevents the possibility of sign dimpling during bolt tightening.
Tamper resistant sign mounting hardware

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