torque range for castle nut?

AR/M4 AR Technical Discussion
1

i’m sure the info is on the site somewhere, but i couldnt find it.

what is the spec for the torque range on the castle nut?

i only have the M16A1 TM.

thanks.

2

40 +/- 2 inch lbs.

3

tks, IG

4

You already told me on my thread the barrel nut spec is 30-80 lbs

are there other torque specs we should know? Flash hider? what else?

TIA

5

Frens,

Give me an email address and I will send you a gift. Preferably Yahoo or something that will accept 10MB.

6

Old style washer for flash hider requires 15-20 ft. lbs. IIRC. There is no torque value when using the crush washer.

7

IG, email sent. Thank you.

8

Did you guys get your emails? They were sent last night.

9

just came back home and took a quick look at it.
awsome!
a lot of info in there!

thank you Sir,
stay safe.

10

May sound ignorant here, but what kind of torque wrench should I get for castle nuts? I have four stripped lowers, and I want to make sure I do it right.

11

i only have one for Foot Lbs, which i got for barrel nuts.

not this model, but this style.

http://www.sears.com/shc/s/p_10153_12605_00944595000P

apparently i’ll need another torque wrench for castle nuts i guess.

for castle nuts you’d might want something more like this?

http://www.ebikestop.com/pedros_14quot_pro_torque_wrench_20_53_266_inch_pounds-TL0596.php

or something cheaper, like this?

http://www.modernbike.com/itemgroup.asp?igpk=2126177209&TID=367

i don’t know. my other stocks like UBRs, SOCOMs and A2 dont need castle nuts. i have a M4 stock, but it came with a complete lower. this is my first install.

12

Is there a M4 stock tool other than the $50+ Brownell’s that accepts a torque wrench?

13

This will sound like AR heresy but I actually don’t torque mine. I work the trheads, apply anti-seize and then tighten. Once it is snug I give it another little jerk and then stake it. I have done well over 150 of them and have yet to have one come loose. YMMV.

14

That’s good to hear. Blue loctite?

15

NO LOCTITE! Anti-seize or molybdenum grease and then tighten.

16

Never got an email or PM from you. Try again.

17

$12 RRA stock wrench or $20 DPMS multi-wrench

18

It looks like the RRA is cut for the A2 buffer, not a torque wrench.

19

ah ok. good to know. i don’t own one, i just have the DMPS tool.

20

Hmmm…a thread on TOS has Ken Elmore saying that ALL torque values for the M16/M4 are in FOOT pounds. And an email from Bushmaster says 32-35 Ft/Lbs

http://www.bushmaster.com/faqs/afmmain.aspx?faqid=904