bolts

[dr dick]

I've compiled a complete(?) listing of all the 57-69 bolt part numbers, diameters, threads per inch, and lengths by combing through the 57 to 69 parts books and supplements.

although there is one mystery: 4406b.
its in the 62 supplement under buddy seat.
anyone?

[dr dick]

Bolts 57-69

3720 1/4–28 x 7/16 long

3728 1/4–20 x1/2 long

3738 1/4–28 x 1/2 long

3741 1/4–28 x 1/2 long 3/8 hex

3765 1/4–28 x 5/8 long

3767B 1/4–20 x 9/16 long

3791 1/4–28 x 3/4 long

3825 1/4–28 x 1” long

3831 1/4–20 x 1” long drilled

3838 1/4-28 x 1 5/16 long

3840 1/4–28 x 1 1/4 long

3947 5/16–24 x 3/4 long

3948 5/16–24 x 7/16 long

3952 5/16-18 x 7/16 long

3953W 5/16–24 x 1/2 long

3954B 5/16-24 x 1/2” long

3955W 5/16–24 x 1/2 long

3956 5/16–24 x 9/16 long

3959 5/16–18 by 9/16 long

3970B 5/16–24 x 1” long brake drum

3971 5/16–24 x 3/4 long brake drum

3974(HW) 5/16–24 x 3/4 long

3991 5/16-18 x 7/8 long

3996 5/16–24 x 7/8 long

4000 5/16-24 x 1” long

4001 5/16–24 x 15/16 long

4005W 5/16–18 x 1“ long

4012 5/16–24 x 1 1/8 long

4014W 5/16-24 x 1 1/4 long

4017 5/16-18 x 1” long

4020 5/16–24 x 1 3/8 long

4022W 5/16-18 x 1 1/8 long

4036 5/16–24 x 1 1/2 long

4041W 5/16–24 x 1 1/2 long

4042HW 5/16–24 x 1 3/4 long

4060W 5/16–24 x 2 1/4 long

4066 5/16–18 x 2 13/32 long

4072 5/16-24 x 2 5/8 long

4080 5/16 – 18 x 2 3/4 long

4082 5/16–24 x 3 1/16 long

4083W 5/16–24 x 3 3/4 long

4086 5/16–18 x 3“ long

4100 5/16–18 x 4 1/16 long

4102B 5/16-18 x 3 1/2 long

4106 5/16–18 x 4 7/16 long

4293 3/8-16 x 25/32 long

4300 3/8–16 x 7/8 long

4323 3/8–16 x 1“ long

4335W 3/8-24 x 1 1/8 Long

4336(W) 3/8–24 x 1 1/8“ long

4337W 3/8-24 x 1 1/4 long

4348 3/8–16 x 1 3/16 long

4354 3/8–16 x 1 3/8 long

4362 3/8–24 x 1 3/8 long

4370 5/16–24 x 1 9/16 long

4371B 3/8–16 x 1 5/8 long socket head

4372(w) 3/8–24 x 1 5/8 long

4374B 3/8–24 x 1 5/8 long

4379 3/8–24 x 1 23/32 long

4388B 3/8–24 x 2 1/16 long

4452(B)(HB) 3/8–24 x 2 1/2 long

4618W 7/16–20 x 7/8 long

4621 7/16–14 x 1 1/8 long

4660W 7/16–20 x 1 1/2 long

4680 7/16–20 x 2 1/8 long

4681W 7/16 –20 x 2 3/4 long

4714W 7/16–20 x 2 21/32 long

4826HB 1/2–20 x 1 7/8 long

[dr dick]

3 points to investigate:

1)
3953w
3954b
3955w
does this shed light on the front fender/chainguard fasteners?
there were 3 different ones
7/16 hex head
1/2 hex head unmarked
1/2 hex head marked

2)
4036
4104w

3)
4372w
4374b

[epinut]

boon.jpg (335.55 KiB) Viewed 7011 times

I've compiled a complete(?) listing of all the 57-69 bolt part numbers, diameters, threads per inch, and lengths by combing through the 57 to 69 parts books and supplements.

although there is one mystery: 4406b.
its in the 62 supplement under buddy seat.
anyone?

[Ferrous_Head]

It's not in my 59-62 supplement dated Sept 1961.

[Otis]

In relation to the 3953W front fender bolts with the 7/16” head; what markings do these have? I’ve had 3-XLCHs with circle F markings used on the fender as well as the front chainguard bolt being the same leading me to believe that 3 bikes is more than a coincidence and they all left the factory with these bolts. During judging I was told these were wrong and should be 1/2” headed plain bolts. Clarification is appreciated.

[Rubone]

I've compiled a complete(?) listing of all the 57-69 bolt part numbers, diameters, threads per inch, and lengths by combing through the 57 to 69 parts books and supplements.

although there is one mystery: 4406b.
its in the 62 supplement under buddy seat.
anyone?

It appears in the BT parts books with the muffler and associated bits. It also shows it superseded by a 3" long bolt in that catalog. My guess is it was for muffler mounting arms for BT, and perhaps in the buddy seat stuff for early type two piece passenger peg on XL series.

[53modelkhd]

I am incline to aggree with on the you on the "F" bolts on the fender mount. Although the popular opinion is that the bolts are unmarked. The only evidence that I can give to support your argument is a picture in a April 1968 Cycle World magazine XLH road test article. The picture is of a close up of the front brake and wheel. The picture is not really clear, but it does show some marking on the head of the bolt. questions/comments drop me a note
For what it is worth - the factory photo of the 56 KH on this site clearly shows CP mount bolts if you supersize the picture.

[ptk46]

Purchased a very original, two owner 1960 XLH about 20 years ago.
Still have the bike, and it’s on the road.
7/16”, circle F bolts were and still are holding the front fender in place.
That’s the problem with judging.
There’s many examples where the judges aren’t in tune and even the parts books are not accurate.
I’d bet the bike that the circle F’s are correct.

[Otis]

Also the parts book says 7/16” heads and all the plain bolts I’ve seen are 1/2”.