Unistrut Bolts

Unistrut Bolts Supplier

Robexstrut is a trusted dealer and supplier of premium Unistrut bolts and fittings. We supply products that meet the highest industry standards, ensuring durability and reliability. Unistrut bolts, paired with washers and nuts, securely fasten fittings to strut channels for easy structural assembly.

Upgrade your projects with our premium Unistrut bolts and fittings. Contact Robexstrut today for reliable fittings tailored to your needs!

Unistrut Bolts, Unistrut Bolt Sizes, Unistrut Channel Bolts, Unistrut Fasteners, Unistrut Bolts M6 And M8

Seismic Rod Stiffener Specification

Material :

Unistrut channel nuts are manufactured from mild steel bars. After machining operations, they are case hardened to ensure positive biting action into the inturned edge of the Unistrut channel.

Threads :

All threads on the nuts and bolts are Unified and American coarse screw threads.

Dimensions :

Imperial dimensions are illustrated in inches.
Unless noted, all metric dimensions are shown in millimeters.
Many Unistrut nuts, bolts, and hardware items are also available in standard metric dimensions.

Bolt Sizes and Channel Nut ASTM :

1/4″ & 5/16″: A1011 SS GR45; 3/8″, 7/16″ & 1/2″: A576 GR1015 Modified; 5/8″ & 3/4″: A36 or A675 GR60; 7/8″: A36

Design Bolt Torque:

BOLT SIZE	1/4″-20	5/16″-18	3/8″-16	1/2″-13	5/8″-11	3/4″-10
Rec.Torque Ft/Lbs(N*m)	6 (8)	11 (15)	19 (26)	50 (68)	100 (136)	125 (170)
Max Torque Ft/Lbs<N*m)	7(9)	15(20)	25(34)	70(95)	125(170)	150(203)

Our Unistrut channel bolts come in a variety of options to suit diverse applications. The 1/2″-13 channel bolts are crafted from galvanized steel, offering a silver finish with a 15/16-inch overall length and a bolt size of 1/2 inch, available at $26.80 per package of 25. For smaller requirements, we provide 3/8-inch unistrut channel bolts made from galvanized steel with a gold finish and a 1-inch length, priced at $29.06 per package of 50. Additionally, we offer hexagonal hot-dip galvanized steel unistrut bolts with an M10 diameter and 25 mm length, exclusively designed for use with HDG nuts to accommodate thread variations. For superior corrosion resistance, our stainless steel Unistrut bolts are available in sizes ranging from 1/2 inch to 4 inches, manufactured using SS304 grade material and a hot-rolled technique for durability.

Features & Applications of Unistrut Bolts:

Available in various custom sizes and grades
Quality tested for optimal performance
Designed for industrial applications requiring high strength and ensures easy installation.
Compatible with Unistrut nuts and bolts for secure and efficient assembly

Upgrade your projects with our premium Unistrut bolts and fittings. Contact Robexstrut today for reliable fittings tailored to your needs!

Unistrut Bolt Type & Size Chart

Hex Flange Bolts

Fiberfast bolts are ideal for mechanical connections that require a high degree of corrosion resistance. The 3⁄8″ diameter fasteners are recommended for all channel fitting mechanical connections.
Material: glass-reinforced polyurethane

Part Number	Size(in)	Thread Shear Lbs(kN)	Shank Shear Lbs(kN)	Shoulder Length In(mm)	*Torque Ft/Lbs(Nm)**	Wt/100 pcs Lbs(kg)
250PU-075	1/4×3/4	110 0.49	210 0.93	Full Thread	0.8 1	.4 0.2
250PU-100	1/4×1	110 0.49	210 0.93	full Thread	0.8 1	.5 .02
250PU-150	1/4×1^1/2	110 0.49	210 0.93	1/2 12.7	0.8 1	.6 0.3
500PU-125	1/2×1^1/4	450 2.00	870 3.87	Full Thread	8 11	1.0 0.5
500PU-150	1/2×1^1/2	450 2.00	870 3.87	Full Thread	8 11	1.1 .05
500PU-200	1/2×2	450 2.00	870 3.87	3/4 19.1	8 11	1.3 0.6
500PU-250	1/2×2^1/2	450 2.00	870 3.87	Full Thread	8 11	1.6 0.7
500PU-300	1/2×3	450 2.00	870 3.87	1 25.4	8 11	1.8 0.8
500pu-350	1/2×3^1/2	450 2.00	870 3.87	2^3/16 55.6	8 11	2.0 0.9

Hex Bolts

Fiberfast bolts are ideal for mechanical connections that require a high degree of corrosion resistance. The 3⁄8″ diameter fasteners are recommended for all channel fitting mechanical Connections.
Material: glass-reinforced polyurethane

Part Number	Size(in)	Thread Shear Lbs(kN)	Shank Shear Lbs(kN)	Shoulder Length In(mm)	*Torque Ft/Lbs(Nm)**	Wt/100 pcs Lbs(kg)
375PU-125	3/8×1^1/2	250 1.11	470 2.09	Full Thread	3 4	1.0 0.5
375pu-150	3/8×1^1/2	250 1.11	470 2.09	1/4 6.4	3 4	1.1 0.5
375pu-200	3/8×2	250 1.11	470 2.09	1/2 12.7	3 4	1.3 0.6
375pu-250	3/8×2^1/2	250 1.11	470 2.09	3/4 19.1	3 4	1.6 0.7
375pu-300	3/8×3	250 1.11	470 2.09	1 25.4	3 4	1.8 0.8
625pu-125	5/8×1^1/4	700 3.11	1360 6.05	1/4 6.4	12 16	2.5 1.1
625pu-150	5/8×1^1/2	700 3.11	1360 6.05	1/4 6.4	12 16	2.8 1.3
625pu-200	5/8×2	700 3.11	1360 6.05	1/4 6.4	12 16	3.2 1.5
625pu-250	5/8×2^1/2	700 3.11	1360 6.05	1/4 6.4	12 16	3.4 1.5
625pu-300	5/8×3	700 3.11	1360 6.05	1/4 6.4	12 16	3.9 1.8
625pu-350	5/8×3^1/2	700 3.11	1360 6.05	1^1/4 6.4	12 16	5.5 2.5

Nonmetallic U-bolt

Unistrut Nonmetallic U-Bolts provide a corrosion resistant alternative to traditional metallic U-Bolts. They have oversized diameters which allow them to hold steel conduit and plastic pipe. These bolts will outlast stainless steel in most corrosive applications.
Each U-Bolt comes with two polyurethane hex nuts. Additional nuts and washers can be purchased separately.
Material: glass-reinforced polyurethane

Part Number	Size(in)	“A”Dim In(mm)	“B”Dim In(mm)	“C”Dim In(mm)	“D”Dim In(mm)	“TL”Dim In(mm)	Load Lbs(kN)	*Torque IN/Lbs(Nm)**	Wt/100 pcs Lbs(kg)
UB-050	1/2	0.937 23.8	0.375 9.5	1.568 39.8	2.412 61.3	1.25 31.8	135 0.60	40 5	3 1.4
UB-075	3/4	1.125 28.6	0.375 9.5	1.662 42.2	2.600 66.0	1.25 31.8	135 0.60	40 5	3 1.4
UB-100	1	1.375 34.9	0.375 9.5	1.787 45.4	2.850 72.4	1.25 31.8	135 0.60	40 5	4 1.8
UB-125	1^1/4	1.687 42.8	0.375 9.5	1.943 49.4	3.162 80.3	1.25 31.8	135 0.60	40 5	4 1.8
UB-150	1^1/2	2.000 50.8	0.375 9.5	2.100 53.3	3.475 88.3	1.25 31.8	135 0.60	40 5	5 2.3
UB-200	2	2.437 61.9	0.500 12.7	2.468 62.7	4.187 106.3	1.50 38.1	135 0.60	80 9	10 4.5
UB-250	2^1/2	2.937 74.6	0.500 12.7	2.718 69.0	4.687 119.0	1.50 38.1	135 0.60	80 9	11 5.0
UB-300	3	3.562 90.5	0.500 12.7	3.031 77.0	5.312 134.9	1.50 38.1	135 0.60	80 9	14 6.4
UB-350	3^1/2	4.062 103.2	0.500 12.7	3.281 83.3	5.812 147.6	1.50 38.1	135 0.60	80 9	15 6.8
UB-400	4	4.562 115.9	0.500 12.7	3.531 89.7	6.312 160.3	1.50 38.1	135 0.60	80 9	16 7.3
UB-600	6	6.750 171.5	0.625 15.9	5.750 146.1	9.875 250.8	3.25 82.6	135 0.60	120 14	17 7.7