Strut Channel Nuts: Spring Nuts, Thread Sizes & Pull-Out Loads
Choose a channel nut by channel series and depth, bolt thread, and listed nut family. Check pull-out, slip resistance and seating torque separately for that combination. Thread size alone does not establish a load rating.
This page picks a channel nut: 47 part numbers by thread size and channel depth, spring and plain, with the pull-out, slip and torque figures the manufacturer publishes for each channel gauge.
Straight to the numbers: full specification table · Before you order
Metric thread? M6 to M12 channel nuts, and what we can and cannot publish
Go straight to the nut tables and read the row. The search box in the header takes a part number on any page.
B-Line, Superstrut, Power-Strut or Haydon. The cross-reference table prints what each published document lists opposite it, with the source named on every cell.
Identify the channel, match the thread, choose a listed nut family, then check the applicable reference data.
How does a channel nut connect to strut?
A channel nut seats beneath the channel's inturned lips. Tightening the bolt draws the nut against those lips to form the connection. The spring, where fitted, helps position the nut during assembly; it is not a substitute for checking the nut's compatibility with the channel.
What must match before I use a published rating?
Start with the exact combination described by the catalog: channel series and gauge, nut thread and family, and the stated installation conditions. A similar-looking nut or the same thread size is not enough to transfer a published value to another assembly.
- Nut engagement. Check the manufacturer's installation instructions for seating and orientation. Do not assume a nut is correctly engaged just because a bolt can be started.
- Seating torque. Use the applicable torque entry and its notes. Do not treat additional tightening as evidence of additional capacity.
- Material and finish. Identify both the nut and channel finish. If the supplied combination differs from the published reference, obtain the applicable product information rather than estimating a change in slip resistance.
The tables here are catalog data for reference parts, not ratings for the parts we supply. A project-specific connection needs the documentation for the actual components and assembly.
How do I choose a channel nut for the strut I have?
Work from the channel to the nut. Record the channel's manufacturer and series if known, its depth and gauge, and the bolt's complete thread designation. Then use the nut-family tables to find a listed combination before reading the pull-out, slip and torque tables.
- Identify the channel. A channel width by itself does not identify its depth or series. Keep any channel marking or drawing with the inquiry; if the series is unknown, provide the dimensions instead of guessing a part number.
- Match the thread. Give diameter and pitch together. Keep metric and Unified thread designations distinct; see the metric reference for information not covered by these tables.
- Check the nut family. Spring, no-spring, shallow-channel and extra-deep-channel entries are separated below. Use the family listed for the channel, then check the manufacturer's installation information.
- State the finish and the required check. Keep finish requirements separate from the base part number. If the question concerns load, identify whether it is pull-out or sliding along the channel, and request the applicable data for that combination.
For another worked selection guide, Unistrut Midwest, a Unistrut distributor, groups nut families by their compatible channel series in Finding the Right Nut for Your Unistrut Channel. That guide helps identify a family; it does not establish a rating for a substitute supplied by us.
Full specification table
Channel nuts with spring
A spring helps keep the nut positioned while the bolt is started. Standard series for 1-5/8 in. deep channels (P1000, P1100, P2000, P3000):
| Part | Thread |
|---|---|
| P1006-0832 | #8-32 |
| P1006-1024 | #10-24 |
| P1006-1420 | 1/4"-20 |
| P1007 | 5/16"-18 |
| P1008 | 3/8"-16 |
| P1009 | 7/16"-14 |
| P1010 | 1/2"-13 |
Large-thread spring nuts, same channels:
Show the table — 3 rows
| Part | Thread |
|---|---|
| P1012S | 5/8"-11 |
| P1023S | 3/4"-10 |
| P1024S | 7/8"-9 |
For shallow channel — P3300, P4000, P4100
Show the table — 9 rows
| Part | Thread |
|---|---|
| P4006-0832 | #8-32 |
| P4006-1024 | #10-24 |
| P4006-1420 | 1/4"-20 |
| P4007 | 5/16"-18 |
| P4008 | 3/8"-16 |
| P4009 | 7/16"-14 |
| P4010 | 1/2"-13 |
| P4012S | 5/8"-11 |
| P4023S | 3/4"-10 |
For extra-deep P5500 channel
Show the table — 7 rows
| Part | Thread |
|---|---|
| P5506-0832 | #8-32 |
| P5506-1024 | #10-24 |
| P5506-1420 | 1/4"-20 |
| P5507 | 5/16"-18 |
| P5508 | 3/8"-16 |
| P5509 | 7/16"-14 |
| P5510 | 1/2"-13 |
Source: Unistrut® General Engineering Catalog no. 17, p. 76–79 · Verified 2026-07-20
Channel nuts without spring
No-spring nuts omit the positioning spring. The tables distinguish flat, standard and T-series parts; check the listed channel application for the specific part instead of assuming that every no-spring nut fits every channel depth.
Flat nuts, all channel depths:
Show the table — 4 rows
| Part | Thread |
|---|---|
| P3016-0632 | #6-32 |
| P3016-0832 | #8-32 |
| P3016-1024 | #10-24 |
| P3016-1420 | 1/4"-20 |
Standard no-spring nuts (P3010 excludes shallow channels; P3013 is the 1/2 in. nut for shallow):
Show the table — 8 rows
| Part | Thread |
|---|---|
| P3006-0832 | #8-32 |
| P3006-1024 | #10-24 |
| P3006-1420 | 1/4"-20 |
| P3007 | 5/16"-18 |
| P3008 | 3/8"-16 |
| P3009 | 7/16"-14 |
| P3010 | 1/2"-13 |
| P3013 | 1/2"-13 |
Large thread and no-spring T variants. The cited Eugene Fastener cross-reference uses “cone nut” for P1008T; that label is not established here for every T-series part.
Show the table — 9 rows
| Part | Thread |
|---|---|
| P1012 | 5/8"-11 |
| P1023 | 3/4"-10 |
| P1024 | 7/8"-9 |
| P4012 | 5/8"-11 |
| P4023 | 3/4"-10 |
| P1006T1420 | 1/4"-20 |
| P1008T | 3/8"-16 |
| P1010T | 1/2"-13 |
| P4010T | 1/2"-13 |
Source: Unistrut® General Engineering Catalog no. 17, p. 76–79 · Verified 2026-07-20
“Cone nut” per Eugene Fastener’s published strut cross-reference, cited for P1008T in the full cross-reference table.
Pull-out, slip and torque ratings
Pull-out is loading that pulls the nut away from the channel lips. Slip resistance concerns movement along the channel. Seating torque is the catalog's tightening value; it is not a load capacity. These columns answer different questions and should not be substituted for one another.
Find the table for the channel series and gauge, then the row for the nut's thread size. Read the required column together with the table notes. The published reference ratings carry a minimum safety factor of 3. Values marked * may require a 3/8 in. or 1/2 in. thick fitting to develop. These are catalog ratings for the reference part, not for parts we supply.
Shallow channel has a separate reference table. Check the nut family specified for that channel before using it; the shallow-channel entries do not establish a general reduction factor for another nut or channel. The data for a nut also does not establish the capacity of the complete support, including its fittings and clamps.
In 12-gauge channel (P1000, P3000, P5000, P5500)
Show the table — 7 rows
| Thread | Pull-out | Slip resist. | Torque (ft-lbs) |
|---|---|---|---|
| 3/4"-10 | 2500 lbs | 1700 lbs | *125 |
| 5/8"-11 | 2500 lbs | 1500 lbs | *100 |
| 1/2"-13 | 2000 lbs | 1500 lbs | 50 |
| 7/16"-14 | 1400 lbs | 1000 lbs | 35 |
| 3/8"-16 | 1000 lbs | 800 lbs | 19 |
| 5/16"-18 | 800 lbs | 500 lbs | 11 |
| 1/4"-20 | 600 lbs | 300 lbs | 6 |
Catalog rating for the reference part, not for parts we supply.
In 12-gauge shallow P3300
Show the table — 4 rows
| Thread | Pull-out | Slip resist. | Torque (ft-lbs) |
|---|---|---|---|
| 1/2"-13 | 1500 lbs | 1500 lbs | 50 |
| 3/8"-16 | 1000 lbs | 800 lbs | 19 |
| 5/16"-18 | 800 lbs | 500 lbs | 11 |
| 1/4"-20 | 600 lbs | 300 lbs | 6 |
Catalog rating for the reference part, not for parts we supply.
In 14-gauge channel (P1100, P4100)
Show the table — 4 rows
| Thread | Pull-out | Slip resist. | Torque (ft-lbs) |
|---|---|---|---|
| 1/2"-13 | 1400 lbs | 1000 lbs | 50 |
| 3/8"-16 | 1000 lbs | 750 lbs | 19 |
| 5/16"-18 | 800 lbs | 400 lbs | 11 |
| 1/4"-20 | 600 lbs | 300 lbs | 6 |
Catalog rating for the reference part, not for parts we supply.
In 16-gauge channel (P2000, P4000)
Show the table — 4 rows
| Thread | Pull-out | Slip resist. | Torque (ft-lbs) |
|---|---|---|---|
| 1/2"-13 | 1000 lbs | 1000 lbs | 50 |
| 3/8"-16 | 1000 lbs | 750 lbs | 19 |
| 5/16"-18 | 800 lbs | 400 lbs | 11 |
| 1/4"-20 | 600 lbs | 300 lbs | 6 |
Catalog rating for the reference part, not for parts we supply.
Source: Unistrut® General Engineering Catalog no. 17, p. 76–79 · Verified 2026-07-20
Where it is used
- Every bolted joint
- Page 85: all 9/16 in. fitting holes take a 1/2 in. x 15/16 in. hex head cap screw and a 1/2 in. nut — P1010, P4010 or P5510, depending on the channel — and nuts and bolts are not included with the fitting.
- Published connections
- Page 89 bases its connection data for 90° fittings on a P1010 nut and a 1/2 in. bolt. Change the nut and the published figure no longer describes the joint.
- Rod suspension
- Page 122 draws a P3016-1024 or P3016-1420 flat nut with the P2675 light duty rod suspension clamp, for mounting insulators.
- Bracing assemblies
- Page 84 calls out a P3008 nut in the P2485 cradle clip assembly that braces P1000 channel laterally and transversely, and refers the detail to a separate bracing catalog.
Source: Unistrut® General Engineering Catalog no. 17, p. 84, 85, 89, 122 · Verified 2026-09-19
Made to order
What we quote against a nut number is a candidate substitute made to order by a contract manufacturer, not an original-manufacturer part.
- Catalog spec
- Page 75: channel nuts are machined from mild steel bars and case hardened for positive biting action into the inturned edge of the channel. The standard nut conforms to ASTM A576 GR 1015 modified and A1011 SS GR 45, screws to SAE J429 GR 2, threads Unified and American coarse.
- What we supply
- Steel, hardening and finish are quoted on their own line with the grade beside them, never merged into the catalog column. No mill certificate is published here yet; one can be requested per mill and is confirmed at quotation.
- Metric
- Page 75 states metric nuts and bolts exist on request, but prints no metric part numbers, so none are listed here.
- Terms
- Plain, EG, HDG and stainless, plus powder coating on request. Minimum order: none. Most orders are a few hundred pieces; smaller runs are quoted too. Production lead time: 5–7 business days, ex-factory. Counted from order confirmation and receipt of deposit (or drawing approval for custom parts, whichever is later). This does not include transit.
Frequently asked questions
What is the torque spec for strut channel nuts?
Use the Torque column for the specified channel table and thread-size row in the ratings section, including any marked qualification. Seating torque is an installation value, not a load rating or a minimum to exceed. These entries describe the catalog reference combination, not parts we supply.
How much pull-out load can a channel nut take?
Thread size alone does not establish a channel nut's pull-out rating. Identify the channel series and gauge and the nut thread, then read the matching pull-out entry in the ratings section. Check slip resistance separately when movement along the channel is the concern. The published values are for the catalog reference combination, not parts we supply.
What is the difference between spring and no-spring channel nuts?
A spring helps hold the nut in position while the bolt is started. A no-spring nut omits that positioning spring. Choose a nut family listed for the channel and check its own product information; the presence or absence of a spring does not by itself establish identical fit, price or load performance.
Do channel nuts work with slotted channel?
Check the nut manufacturer's compatibility information for the exact slotted channel series and nut family. The nut engages the channel lips, but that does not establish that every spring arrangement or every published rating applies to all slotted and punched variants. Use the specified combination and its installation instructions.
Which nuts fit shallow strut channel?
Use a nut family listed for the particular shallow channel series. The spring-nut tables separate shallow-channel entries, and the no-spring tables identify their applications. Check channel depth and nut family together; a matching bolt thread alone does not prove the nut fits.
Which channel nut ranges cover M6 through M12 for 41 mm electrical strut systems?
The tables on this page list Unified thread designations rather than metric part numbers. The source catalog notes metric availability but does not give metric part numbers in this section. For an M-thread inquiry, state the thread and channel series and depth; the metric reference separates catalog information from details confirmed at quotation.
What is a channel cone nut?
The cited Eugene Fastener cross-reference uses “cone nut” for P1008T. See its cross-reference row and the no-spring nut table. That source does not establish “cone nut” as the name for every T-series part; use the exact part number when asking about fit.
Before you order
Keep each nut and its mating channel on the same inquiry line. A useful BOM entry names the reference part or description, complete thread, channel series and depth, spring type, finish and quantity. For identification details you cannot confirm, write “unknown” in the BOM or message rather than filling them from appearance.
- Give the thread and channel identity. Include the complete thread designation, channel series and depth. Add a drawing or dimensions when the series is unknown.
- Specify spring or no spring. Name the part or nut family being requested; do not leave the selection to a thread size alone.
- Identify the mating bolt. The catalog orders nuts and bolts separately. State both when requesting information for a connection.
- Write the finish requirement in words. Include the channel finish and any project requirement so the requested combination can be checked at quotation.
- Ask for the price break. Unit price is quantity-based — ask for the price break in your quote. We do not publish one here because it moves with mill, finish and volume.
If your project needs a drawing, material certificate or other submittal, name the requirement in the inquiry and check the document availability and limitations before ordering. A reference catalog is not a document for the supplied part.
Get these part numbers quoted
Use the part number or BOM field to identify the nut you need, including its channel and thread. Add quantity, finish and destination. If the finish is undecided, choose “Not sure — advise me” and describe the use in the message. Ask for the quoted part identification and any differences from the catalog reference before ordering.
No minimum order · 5–7 business days ex-factory · Reply within one business day (Asia/Shanghai, UTC+8) · Finishes: plain, EG, HDG, stainless
For photos or drawing files, email contact@channelstrut.com and identify the related part or BOM line. Minimum order quantity, production lead time, transit and samples are set out in full under Ordering terms.