The product view is a rendering built from the manufacturer solid for this part number, not stock photography. No dimensioned drawing of P1010 is published on this site.
Channel nut · 1-5/8 in. deep series
P1010 — 1/2 in.-13 Channel Nut with Spring
The 1/2 in.-13 spring channel nut for 1-5/8 in. deep strut. It goes into the open face sideways, turns a quarter into the inturned lips, and the spring holds it at the height you set while you start the bolt single-handed.
By Alex · Last reviewed 2026-09-16 · Spec looks wrong? Tell us.
- Thread
- 1/2 in.-13 UNC
- Fits
- P1000, P1100, P2000 and P3000 channel
- Spring
- fitted — this is the sprung nut, not the plain one
- Catalog ref.
- Unistrut® GEC no. 17, p. 78
Dimensions and steel above are the catalog specification for the reference part. The thickness and material we supply are stated in Supply summary and confirmed at quotation.
Pack: Packed per order. The bolt is a separate line: the catalog pairs a 9/16 in. fitting hole with a 1/2 x 15/16 in. hex head cap screw.
Catalog figures for the reference part, with where each one comes from.
| Dimension | Catalog value (reference part) | Source |
|---|---|---|
| Thread | 1/2 in.-13 | Unistrut® General Engineering Catalog no. 17, p. 78 — printed in the part table |
| Channel depths it is cut for | P1000 / P1100 / P2000 / P3000 | Unistrut® General Engineering Catalog no. 17, p. 78 — printed in the part table |
| Spring | fitted | Unistrut® General Engineering Catalog no. 17, p. 78 — printed in the part table |
| Bolt it pairs with | 1/2 x 15/16 in. hex head cap screw | Unistrut® General Engineering Catalog no. 17, p. 85 — fittings application note |
| Fitting hole it is used through | 9/16 in. (14.3 mm) | Unistrut® General Engineering Catalog no. 17, p. 85 — fittings application note |
| Nut body length, width and height | not published | The p. 78 table publishes thread, channel fit and weight. That page holds no body dimensions, and none are measured off an illustration. |
| Spring free height and spring rate | not published | Not published in the p. 78 table. The spring positions the nut; it is not a rated element. |
| Serration or groove detail | not published | The nut face is serrated to bite the lips, but p. 78 publishes no tooth geometry, so none is stated here. |
| Finish suffixes | not published | The catalog pages used here (pp. 76-79) cover thread, fit and weight only. State the finish in words on the order rather than guessing a suffix. |
The p. 78 table is organised by channel depth first and thread second, which is why the same 1/2 in.-13 thread appears three times in the catalog under three part numbers. P1010 is the deep-series row.
The same thread in the other channel depths
A channel nut is specified twice over: by thread and by the depth of the lip pocket it has to turn into. Getting the thread right and the depth wrong gives you a nut that will not turn in, which is the single most common wrong box on a strut delivery.
| Part | Thread | Channel it fits |
|---|---|---|
| P1010 | 1/2 in.-13 | P1000 / P1100 / P2000 / P3000 |
| P4010 | 1/2 in.-13 | P3300 / P4000 / P4100 (shallow) |
| P5510 | 1/2 in.-13 | P5500 (deep) |
| P3010 | 1/2 in.-13 | all but P3300 / P4000 / P4100, no spring |
| P1010T | 1/2 in.-13 | P1000 series, no spring |
Source: Unistrut® General Engineering Catalog no. 17, p. 78 — printed in the part table for the sprung nuts and Unistrut® General Engineering Catalog no. 17, p. 79 — printed in the part table for the unsprung ones.
What bolts through it, and where the published data stops.
How it goes in. Hold the nut with the long axis along the channel, push it through the open face past the lips, and turn it a quarter so the long axis lies across the channel. The spring then pushes the nut back against the underside of the lips and holds it at that point on the run while you line the fitting up and start the bolt. Without the spring the nut drops and you need two hands and a magnet.
What it bolts through. Every 9/16 in. hole in the 1-5/8 in. fitting line — P1026, P1064, P1065 and the rest — takes a 1/2 x 15/16 in. hex head cap screw into one of these nuts, one nut and one screw per hole. Neither is supplied with the fitting.
Torque and pull-out. The catalog publishes pull-out and slip figures for channel nuts on p. 77, and a separate design bolt torque table for fittings on p. 85. The two tables are written for different tests and do not print the same figure for a 1/2 in.-13 screw, so no tightening figure is restated here as the one to use. Take it from the manufacturer of the assembly you are actually building, and note that any published figure is for the manufacturer's own nut in the manufacturer's own channel, not for a substitute.
What the published cross-reference tables print opposite P1010.
| Brand | Published cross-reference part number |
|---|---|
| B-Line | N225 [S1][S2][S3] |
| Superstrut | A-100 1/2 [S1][S2][S3] |
| Power-Strut | PS RS 1/2" [S1][S2][S3] |
| Haydon | N-823 [S3] |
A published cross-reference number is one thing only: a number a cited document prints opposite this one, as a candidate substitute in the same catalog slot. It carries no load rating, steel grade, coating thickness or third-party listing — each manufacturer publishes those separately and they do not travel with a part number. Source documents, access dates and what to measure before you fit a substitute: Unistrut P1010 cross reference.
Source: our cross-reference dataset, built 2026-09-09 from the documents listed below.
What a P1010 actually is
A channel nut is a rectangular block of steel, threaded through the middle, with two grooved ends cut so it can be turned into the inturned lips of a strut channel and then cannot pull straight back out. P1010 is the half-inch-thread version for the deep 1-5/8 in. series, and it carries a spring on its back: a bent strip that presses against the bottom of the channel and pushes the nut up hard against the lips.
The spring does no structural work. Its entire job is to hold the nut in place before the bolt is tight, which is what turns a two-person overhead job into a one-person one. That is also why it is the easiest thing for a substitute to leave out: an unsprung nut of the same thread is a different part number, costs less, measures the same across the grooves, and works perfectly well on a bench and badly on a ladder.
Choosing the right nut
Two questions decide it. What thread is the bolt, and how deep is the channel? P1010 answers 1/2 in.-13 and deep. The same thread in the shallow series (P3300, P4000, P4100) is P4010, and in the extra-deep P5500 it is P5510. A P1010 will not turn into a shallow channel, and a P4010 in a deep channel sits low and does not engage the lips properly.
The third question, asked less often and worth asking, is whether you want the spring at all. Inside an enclosure, on a bench-built frame, or anywhere you will be tightening with both hands and the channel open face up, the unsprung nut is cheaper and there is nothing to corrode or to snag. Overhead or on a vertical run, buy the spring.
Checking an incoming shipment
A nut is small, comes in bulk, and is the easiest item on a strut order to get quietly wrong, so check a handful out of each carton rather than one off the top.
1. Run a bolt through it. A 1/2 in.-13 hex head cap screw should start by hand and run the full depth without binding. A thread gauge settles the pitch if the bolt is not to hand; a caliper never will. This is the first check because a mixed carton of 1/2 in.-13 and metric M12 looks completely uniform in the box.
2. Turn one into a length of your own channel. Not into the supplier's sample — into the channel the job will actually use. It should go in sideways, turn a quarter with light thumb pressure, and then resist being pulled back out. A nut that needs pliers to turn, or that turns freely without catching, is cut for a different depth.
3. Confirm the spring is there and is captive. Press it flat against the nut body and let it go; it should return. A spring that is loose in the carton, or that has been spot-fixed so weakly that it comes off in the hand, will be gone before the run is finished.
Last, look at the plating inside the thread. Electro-galvanized nuts are bright and even into the bore; hot-dip galvanizing on a threaded part has to be spun or the thread fills, so an HG nut with a clogged thread is a processing fault and not something to fix with a tap on site.
Related parts
- P1000 — The 12 gauge channel this nut is cut for.
- P1026 — A two-hole angle fitting: one of these nuts and one cap screw per leg.
- Full nut table — Forty-seven part numbers by thread, channel depth and spring.
- Finish options — PL, EG, HDG and stainless, and which of them we can supply.
What we can quote against this part number
We do not manufacture these parts and we are not Unistrut. We source them. The item we can quote against Unistrut P1010 is 1/2 in.-13 channel nut with spring, for 1-5/8 in. deep channel — a candidate substitute made to order by a contract manufacturer, offered for inquiry, not an original-manufacturer part.
| Dimension | Value | Source |
|---|---|---|
| Thread | 1/2 in.-13 | Unistrut® General Engineering Catalog no. 17, p. 78 — printed in the part table |
| Channel depths it is cut for | P1000 / P1100 / P2000 / P3000 | Unistrut® General Engineering Catalog no. 17, p. 78 — printed in the part table |
| Spring | fitted | Unistrut® General Engineering Catalog no. 17, p. 78 — printed in the part table |
These are the published Unistrut catalog dimensions we build to, each with the page it is printed on. They are geometry only. No load, torque or listing figure is claimed for our part: none has been tested on it, and a figure published for a Unistrut part is evidence about that part, not about ours.
Supply summary
What is known about supplying this part number, and nothing that is not. Anything missing from this list is missing because we do not have it yet, not because it was left out.
- Reference part
- Unistrut® P1010, as published in the Unistrut® General Engineering Catalog no. 17
- What we quote against it
- 1/2 in.-13 channel nut with spring, for 1-5/8 in. deep channel — a candidate substitute made to order by a contract manufacturer, offered for inquiry, not an original-manufacturer part.
- Finishes available
- Plain, EG, HDG and stainless, plus powder coating on request.
- Documents we can provide
- A dimension drawing traced from the catalog page cited above. A material certificate on request — availability and cost are confirmed at quotation, per mill.
- Lead time
- 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.
- How to confirm fit
- Measure the incoming parts against "Checking an incoming shipment" on this page, before the carton goes into stock.
Get this part number quoted
Answer the seven lines below and we come back with our part number, finish options, lead time, packing quantity and what documentation we can and cannot supply. There is no list price — it is quoted per mill, finish and volume. The form takes about a minute and already knows this part number. We reply within one business day (Asia/Shanghai, UTC+8).
- Unistrut part number — P1010
- The brand and part number you are replacing
- Finish
- Quantity
- Destination — country, and state or ZIP if US
- Application — general support, electrical, mechanical, seismic, or a listed assembly
- Whether you need submittal documentation
No minimum order · 5–7 business days ex-factory · Reply within one business day (Asia/Shanghai, UTC+8) · Finishes: plain, EG, HDG, stainless
Prefer email? Open a prefilled RFQ in your mail client, or write to contact@channelstrut.com yourself. If the part is going into a specification that names a brand, say so — a substitute has to be accepted in writing before it ships.
Trademarks and who we are
Unistrut, B-Line, Superstrut, Power-Strut and Haydon, and the part numbers published under them, are trademarks or trade names of their respective owners. ChannelStrut is not affiliated with, authorized by, endorsed by or a distributor for any of them. Those brand names and part numbers are used here only to identify the products referred to.
ChannelStrut is run by Alex, a hardware sourcing specialist based in Fujian, China. We do not manufacture these parts — we source them from the mills that produce them. More on how the data is built: About.
Sources
The cross-brand part numbers in the cross-reference tab come from S1, S2 and S3. Every dimension on this page comes from the Unistrut® General Engineering Catalog no. 17, and the page it is printed on is given beside it.
- S1
- Divspec - Strut Fitting Cross Reference (Divspec / B-Line / Unistrut / Powerstrut / Superstrut(Thomas & Betts))
http://www.divspec.com/strut-fitting-cross-reference/
third-party aggregator · accessed 2026-09-09 - S2
- Eugene Fastener - Strut Cross-Reference: Unistrut, B-Line, PowerStrut & More
https://www.eugenefast.com/home/page/resources/strut-channel-cross-reference
third-party aggregator (distributor) · accessed 2026-09-09 - S3
- Master Distribution - Part Number Cross Reference Guide (G-Strut / Unistrut / Powerstrut / Superstrut / Erico / B-Line / PHD / Haydon), 23 pages
https://masterdistrib.com/content/PDF/Masterdistrib_Part_Number_Cross_Reference_Guide.pdf
third-party aggregator · accessed 2026-09-09
Every source above was re-checked for reachability on 2026-09-15.
Unistrut P1010 cross reference — what the published guides print opposite it, and what to measure on a substitute, or the full 126 part-number table.