Sign Bolting Set
For Use with U-Channel and Fiberglass Posts
Sign Bolting Sets are the economical method for mounting traffic, parking, facility and property signs. Each set contains two 5/16” diameter hex-head bolts, two nuts, and four zinc coated washers. 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 1/2" socket and ratchet wrench and 1/2" combination wrench will be needed to install these bolts.
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5/16 x 1½″
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| Material | Packaging | Sku | Quantity/Price | |
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| Zinc Plated Steel | Sold in Packages of 2 - Includes 2 hex head bolts, 2 nuts and 4 washers | Y4931 | $2.05 | |
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5/16 x 2″
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| Material | Packaging | Sku | Quantity/Price | |
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| Zinc Plated Steel | Sold in Packages of 2 - Includes 2 hex head bolts, 2 nuts and 4 washers | Y4899Z | $2.05 | |
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5/16 x 2½″
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| Material | Packaging | Sku | Quantity/Price | |
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| Zinc Plated Steel | Sold in Packages of 2 - Includes 2 hex head bolts, 2 nuts and 4 washers | Y3465 | $2.50 | |
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5/16 x 3″
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| Material | Packaging | Sku | Quantity/Price | |
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| Zinc Plated Steel | Sold in Packages of 2 - Includes 2 hex head bolts, 2 nuts and 4 washers | Y3550 | $2.95 | |
Special Freight Arrangement:
Due to the size of this product, freight shipping will be required. You may contact our customer service team for a quote or you can place your order and a customer service representative will contact you about freight shipping charges.
If you would like to use your own freight carrier, please include your freight carrier account in the special instructions box at the bottom of the checkout page before placing your order. A customer service representative will be in contact with you if there are any questions.
Phone: 800-274-6271
Fax: 800-279-6897
Phone: 800-274-6271
Fax: 800-279-6897
SafetySign.com guarantees that we have the lowest price on every item we manufacture, plain and simple.
If you find a lower price, we'll match it!
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Frequently Purchased Together
Tamperproof One Way Bolt Set
Y4900, Y4901, Y3551
5/16″ Zinc Plated Steel Hex-Head Bolt Set
Hex-head bolts are the economic solution for installing traffic signs, parking signs, property signs, and facility signs with ⅜″ mounting holes. The tables below detail which size bolts should be purchased with each type of applicable post.
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″ × 1½″ | 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″ |
| 12 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 Standard Hex-Head Bolts
Tools required:
- A ½″ socket and ratchet wrench, and ½″ combination wrench.
Installation instructions:
- 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.
- Using the appropriate size bolts, insert a washer over the 5/16″ bolts and then insert the bolts into the mounting holes of the sign and through the post.
- Insert a washer on the other end of the bolt followed by the nut and tighten down.
Optional:
- Add a pair of our ribbed sign saver plates that prevents the possibility of sign dimpling during bolt tightening.
| Size | Diameter | Length | Available Materials |
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| 5/16 x 1½″ | 5/16″ | 1½″ |
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| 5/16 x 2″ | 5/16″ | 2″ |
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| 5/16 x 2½″ | 5/16″ | 2½″ |
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| 5/16 x 3″ | 5/16″ | 3″ |
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