The Ford Barn

John · 09-11-2018, 07:51 PM

OK, shock gurus, what is the thread size and series of the smaller thread on the shock absorber needle valve? I know the large thread series is 1/2"-20 but what is the smaller thread size and series?

Thanks much,

John

John · 09-12-2018, 08:10 AM

OK, I went back and checked the thread again. A book I have on shock absorber repair lists the thread at 3/8"-24 UNF which is standard fine thread but it is not nor is it metric. The tread appears to be a 3/8"-20 UN. This may be correct as the thread pitch matches on both the large and small threads.

BILL WILLIAMSON · 09-12-2018, 01:09 PM

If it FITS, just SCREW IT---LOL
Bill Perverted

Dave in MD · 09-12-2018, 04:24 PM

John,
Brattons is having them reproduced under their part numbers 24939, 24940 and 24950.
Give Jeff a call at 1-800-255-1929 and ask about the thread size. It is not listed in their catalog.
Dave

John · 09-12-2018, 07:08 PM

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Thanks for the reply, Dave. I am 99 and 44/100% sure that it is 3/8"-20 as that is what the micrometer says and that is what the thread pitch gauge indicates. I was hoping that someone else had figured it out and could confirm that for me. While 3/8"-20 is not a garden variety thread, it is still a standard for which I can get a tap.

09-11-2018, 07:51 PM	#1
John Senior Member Join Date: May 2010 Location: Richmond, VA Posts: 189	Shock Absorber Needle Valve Thread OK, shock gurus, what is the thread size and series of the smaller thread on the shock absorber needle valve? I know the large thread series is 1/2"-20 but what is the smaller thread size and series? Thanks much, John

09-12-2018, 08:10 AM	#2
John Senior Member Join Date: May 2010 Location: Richmond, VA Posts: 189	Re: Shock Absorber Needle Valve Thread OK, I went back and checked the thread again. A book I have on shock absorber repair lists the thread at 3/8"-24 UNF which is standard fine thread but it is not nor is it metric. The tread appears to be a 3/8"-20 UN. This may be correct as the thread pitch matches on both the large and small threads.

09-12-2018, 01:09 PM	#3
BILL WILLIAMSON Senior Member Join Date: Dec 2010 Location: FRESNO, CA Posts: 12,560	Re: Shock Absorber Needle Valve Thread If it FITS, just SCREW IT---LOL Bill Perverted __________________ "THE ASSISTANT GURU OF STUFF"

09-12-2018, 04:24 PM	#4
Dave in MD Senior Member Join Date: May 2010 Posts: 175	Re: Shock Absorber Needle Valve Thread John, Brattons is having them reproduced under their part numbers 24939, 24940 and 24950. Give Jeff a call at 1-800-255-1929 and ask about the thread size. It is not listed in their catalog. Dave

09-12-2018, 07:08 PM	#5
John Senior Member Join Date: May 2010 Location: Richmond, VA Posts: 189	Re: Shock Absorber Needle Valve Thread Sponsored Links (Register now to hide all advertisements) Thanks for the reply, Dave. I am 99 and 44/100% sure that it is 3/8"-20 as that is what the micrometer says and that is what the thread pitch gauge indicates. I was hoping that someone else had figured it out and could confirm that for me. While 3/8"-20 is not a garden variety thread, it is still a standard for which I can get a tap.