GA WTB-SM465 block out plug/gasket 3906448 3929530 - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**IronCanine** · 09-05-2023, 12:47 PM

Hi gang. Looking for a hex block out plug 3906448 (preferably NOS) and copper gasket 3929530 (or 3906462), both pictured below. This plug goes in the top cover of an SM465 where the TCS sending unit (if equipped) would otherwise go. Will take used if nice.

A replacement part number for the plug is 8877723.

Thanks for any help,

Brad

**1970cstblazer** · 09-06-2023, 08:04 AM

There are a few of the copper gaskets on ebay..

The plug changed appearance over the years, so be aware of that.

**IronCanine** · 09-06-2023, 09:23 AM

Thanks for the post. Yes, I am aware of the one you have pictured. I'm definitely trying to find an original external hex plug if I can. Hopefully one pops up, new or used.

**IronCanine** · 09-10-2023, 09:12 PM

2 da top

**IronCanine** · 01-07-2024, 09:44 PM

Anybody body got any K20 SM465s out there with a nice version of this plug that they're willing to pull? Looking to catch any traction on this part. Thanks.

**70STOVEBOLT** · 01-08-2024, 03:10 PM

Let me look, I may have one.

**70STOVEBOLT** · 01-08-2024, 09:27 PM

I need to look through my storage tomorrow and I will get back to you. This will be a used plug.

**IronCanine** · 01-08-2024, 11:01 PM

Thank you very much for looking. Beggar's can't be choosers. After a while on the hunt I'm coming up zilch. Fingers crossed you do have one.

**70STOVEBOLT** · 01-09-2024, 08:36 PM

I could not find one.

**IronCanine** · 01-09-2024, 08:53 PM

I really appreciate the effort. The search goes on.

**IronCanine** · 03-25-2024, 10:50 AM

TTT with my new WTB SM465 PTO cover plate thread. Just in case someone has a 4sp they can part. Happy to have a take off block out plug.

**IronCanine** · 04-10-2024, 05:30 PM

Semi-closure on a thread I don't think anybody needs, but in case somewhere down the road it's useful info...Dorman 090-030 drain plug or NAPA 7041936 is a very reasonable facsimile. Pair it with Dorman 097-0827CD copper washer.

The plug is 9/16-18. Maxim Truck parts has a plug S3621-6 that might be closer to OE. Hard to say for sure. But it's a Canadian company and you have to buy $36 worth of an $.80 part to find out.

This'll work well til an NOS example miraculously appears.

Thanks for all who took a look.

09-05-2023, 12:47 PM	#1
IronCanine I'm trying.... Join Date: Oct 2013 Location: Athens, GA Posts: 2,535	WTB-SM465 block out plug/gasket 3906448 3929530 Hi gang. Looking for a hex block out plug 3906448 (preferably NOS) and copper gasket 3929530 (or 3906462), both pictured below. This plug goes in the top cover of an SM465 where the TCS sending unit (if equipped) would otherwise go. Will take used if nice. A replacement part number for the plug is 8877723. Thanks for any help, Brad Attached Images __________________ 1970 Blazer http://67-72chevytrucks.com/vboard/s...d.php?t=645076 1969 K10 SWB CST http://67-72chevytrucks.com/vboard/s...52#post8520352 1971 K20 Z84 https://67-72chevytrucks.com/vboard/...90#post9047290 1946 B.F. Avery Model A Tractor http://67-72chevytrucks.com/vboard/s...55#post8292555 "Sometimes I wonder if zander208 was even real..."

09-06-2023, 08:04 AM	#2
1970cstblazer All stock and staying that way Join Date: Jul 2003 Location: Elkland, PA Posts: 1,277	Re: WTB-SM465 block out plug/gasket 3906448 3929530 There are a few of the copper gaskets on ebay.. The plug changed appearance over the years, so be aware of that. __________________ 1970 K/5 Blazer CST 4WD, Bronze, 93k ACT. miles, 350, 4 speed, positraction, 16.5" x 8.25" wheel option, tilt, tach, vacuum, AM/FM, manual throttle...Dad ordered and purchased new 4/70. Currently frame off restoration in progress... 1972 Cheyenne Super 20 2WD, DK Blue/White, 90K ACT. miles, 402, TH400, 4.10 open, tilt, tach, vacuum, A/C, AM/FM, manual throttle.. A mostly original paint never rusted Texas survivor... 2017 Sierra 1500 SLT 4WD, Black, 41k miles, 5.3, 6L80E, 3.42 LS, 20" polished wheels, everything but moonroof and 6.2... 2019 Canyon SLT 4WD, White, 60k miles, 3.6, 8L45, 3.23 LS, 18" wheels

09-06-2023, 09:23 AM	#3
IronCanine I'm trying.... Join Date: Oct 2013 Location: Athens, GA Posts: 2,535	Re: WTB-SM465 block out plug/gasket 3906448 3929530 Thanks for the post. Yes, I am aware of the one you have pictured. I'm definitely trying to find an original external hex plug if I can. Hopefully one pops up, new or used. __________________ 1970 Blazer http://67-72chevytrucks.com/vboard/s...d.php?t=645076 1969 K10 SWB CST http://67-72chevytrucks.com/vboard/s...52#post8520352 1971 K20 Z84 https://67-72chevytrucks.com/vboard/...90#post9047290 1946 B.F. Avery Model A Tractor http://67-72chevytrucks.com/vboard/s...55#post8292555 "Sometimes I wonder if zander208 was even real..."

09-10-2023, 09:12 PM	#4
IronCanine I'm trying.... Join Date: Oct 2013 Location: Athens, GA Posts: 2,535	Re: WTB-SM465 block out plug/gasket 3906448 3929530 2 da top __________________ 1970 Blazer http://67-72chevytrucks.com/vboard/s...d.php?t=645076 1969 K10 SWB CST http://67-72chevytrucks.com/vboard/s...52#post8520352 1971 K20 Z84 https://67-72chevytrucks.com/vboard/...90#post9047290 1946 B.F. Avery Model A Tractor http://67-72chevytrucks.com/vboard/s...55#post8292555 "Sometimes I wonder if zander208 was even real..."

01-07-2024, 09:44 PM	#5
IronCanine I'm trying.... Join Date: Oct 2013 Location: Athens, GA Posts: 2,535	Re: WTB-SM465 block out plug/gasket 3906448 3929530 Anybody body got any K20 SM465s out there with a nice version of this plug that they're willing to pull? Looking to catch any traction on this part. Thanks. __________________ 1970 Blazer http://67-72chevytrucks.com/vboard/s...d.php?t=645076 1969 K10 SWB CST http://67-72chevytrucks.com/vboard/s...52#post8520352 1971 K20 Z84 https://67-72chevytrucks.com/vboard/...90#post9047290 1946 B.F. Avery Model A Tractor http://67-72chevytrucks.com/vboard/s...55#post8292555 "Sometimes I wonder if zander208 was even real..."

01-08-2024, 03:10 PM	#6
70STOVEBOLT Senior Member Join Date: Jun 2005 Location: Winona Lake, IN Posts: 6,210	Re: WTB-SM465 block out plug/gasket 3906448 3929530 Let me look, I may have one. __________________ 70 C/10 SWB 402/TH400/3.73 "The Needy Beast" 200,000 Mile Club Disc Brake Club Owner installed options: Front Sway Bar Power Steering Power Brakes Cigar Lighter Courtesy Lights Deluxe Side Markers Wiper Delay Power windows Power Locks Coming soon: EFI 2015 Silverado 1500 LS 4.3/6L80/3.23

01-08-2024, 09:27 PM	#7
70STOVEBOLT Senior Member Join Date: Jun 2005 Location: Winona Lake, IN Posts: 6,210	Re: WTB-SM465 block out plug/gasket 3906448 3929530 I need to look through my storage tomorrow and I will get back to you. This will be a used plug. __________________ 70 C/10 SWB 402/TH400/3.73 "The Needy Beast" 200,000 Mile Club Disc Brake Club Owner installed options: Front Sway Bar Power Steering Power Brakes Cigar Lighter Courtesy Lights Deluxe Side Markers Wiper Delay Power windows Power Locks Coming soon: EFI 2015 Silverado 1500 LS 4.3/6L80/3.23

01-08-2024, 11:01 PM	#8
IronCanine I'm trying.... Join Date: Oct 2013 Location: Athens, GA Posts: 2,535	Re: WTB-SM465 block out plug/gasket 3906448 3929530 Thank you very much for looking. Beggar's can't be choosers. After a while on the hunt I'm coming up zilch. Fingers crossed you do have one. __________________ 1970 Blazer http://67-72chevytrucks.com/vboard/s...d.php?t=645076 1969 K10 SWB CST http://67-72chevytrucks.com/vboard/s...52#post8520352 1971 K20 Z84 https://67-72chevytrucks.com/vboard/...90#post9047290 1946 B.F. Avery Model A Tractor http://67-72chevytrucks.com/vboard/s...55#post8292555 "Sometimes I wonder if zander208 was even real..."

01-09-2024, 08:36 PM	#9
70STOVEBOLT Senior Member Join Date: Jun 2005 Location: Winona Lake, IN Posts: 6,210	Re: WTB-SM465 block out plug/gasket 3906448 3929530 I could not find one. __________________ 70 C/10 SWB 402/TH400/3.73 "The Needy Beast" 200,000 Mile Club Disc Brake Club Owner installed options: Front Sway Bar Power Steering Power Brakes Cigar Lighter Courtesy Lights Deluxe Side Markers Wiper Delay Power windows Power Locks Coming soon: EFI 2015 Silverado 1500 LS 4.3/6L80/3.23

01-09-2024, 08:53 PM	#10
IronCanine I'm trying.... Join Date: Oct 2013 Location: Athens, GA Posts: 2,535	Re: WTB-SM465 block out plug/gasket 3906448 3929530 I really appreciate the effort. The search goes on. __________________ 1970 Blazer http://67-72chevytrucks.com/vboard/s...d.php?t=645076 1969 K10 SWB CST http://67-72chevytrucks.com/vboard/s...52#post8520352 1971 K20 Z84 https://67-72chevytrucks.com/vboard/...90#post9047290 1946 B.F. Avery Model A Tractor http://67-72chevytrucks.com/vboard/s...55#post8292555 "Sometimes I wonder if zander208 was even real..."

03-25-2024, 10:50 AM	#11
IronCanine I'm trying.... Join Date: Oct 2013 Location: Athens, GA Posts: 2,535	Re: WTB-SM465 block out plug/gasket 3906448 3929530 TTT with my new WTB SM465 PTO cover plate thread. Just in case someone has a 4sp they can part. Happy to have a take off block out plug. __________________ 1970 Blazer http://67-72chevytrucks.com/vboard/s...d.php?t=645076 1969 K10 SWB CST http://67-72chevytrucks.com/vboard/s...52#post8520352 1971 K20 Z84 https://67-72chevytrucks.com/vboard/...90#post9047290 1946 B.F. Avery Model A Tractor http://67-72chevytrucks.com/vboard/s...55#post8292555 "Sometimes I wonder if zander208 was even real..."

04-10-2024, 05:30 PM	#12
IronCanine I'm trying.... Join Date: Oct 2013 Location: Athens, GA Posts: 2,535	Re: WTB-SM465 block out plug/gasket 3906448 3929530 Semi-closure on a thread I don't think anybody needs, but in case somewhere down the road it's useful info...Dorman 090-030 drain plug or NAPA 7041936 is a very reasonable facsimile. Pair it with Dorman 097-0827CD copper washer. The plug is 9/16-18. Maxim Truck parts has a plug S3621-6 that might be closer to OE. Hard to say for sure. But it's a Canadian company and you have to buy $36 worth of an $.80 part to find out. This'll work well til an NOS example miraculously appears. Thanks for all who took a look. Attached Images __________________ 1970 Blazer http://67-72chevytrucks.com/vboard/s...d.php?t=645076 1969 K10 SWB CST http://67-72chevytrucks.com/vboard/s...52#post8520352 1971 K20 Z84 https://67-72chevytrucks.com/vboard/...90#post9047290 1946 B.F. Avery Model A Tractor http://67-72chevytrucks.com/vboard/s...55#post8292555 "Sometimes I wonder if zander208 was even real..."



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