Solid Backup Ring (8700) 4.000" x 4.500" x 0.062" - Teflon

Marsoni

M251S

$54.69

Get it in 3 business days with 1 day shipping. Friday, May 29

Solid Backup Ring (8700) 4.000" x 4.500" x 0.062" - TeflonProduct Details : Solid Backup Ring (8700) 4. 000" x 4. 500" x 0. 062" Teflon Part No: 870804000SD T Product Category: O Rings Product Type: Solid Backup Ring Series: 8700 Material(s): Teflon Temperature Range: 320F to +450F ( 196C to +232C) System Of Measurement: Inch Dimensions: 4. 000" x 4. 500" x 0. 062" Nominal I. D. (d): 4. 000" Nominal O. D. (D): 4. 500" Thickness (T): 0. 062" Nominal Cross Section: 0. 250" Details: 8700 style back up rings

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I had a project where I was extending the depth of the bottom half of a bookcase I had made out of pre-drilled MDF from Home Depot. The original bookcase was 11" deep x 10' high. The extended depth of the bottom is to be used to hold audio gear and needed to be 18" depth, front to rear. I was able to increase the depth but had to insert additional panels on the left and right so that shelf pins could be installed. I needed a shelf pin jig to do that, and this jig was perfect for the job. After completing my holes and mounting some shelves I was pleased that the alignment with the inner portion of the shelf was perfect and the distance between holes lined up exactly as with the original panels from Home Depot. The jig is high quality fabricated aluminum, not plastic, and it comes with two drill bits, and stop and Allen wrench, including an instruction manual, all in an attractive plastic case. The jig is well worth the modest price and I would definitely recommend it for drilling shelf clip holes.

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Reviewed in the United States on October 27, 2024

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To Protect the Innocent

Massapequa, US

★★★★★ 5

a solid choice

I realized I don't need to drill 5mm holes, so this item is just perfect. It's higher quality than those other cheap-chinese noname jigs. In particular: * The stop collar provided actually fits the drill bit. I had one from Tanyo that had too-big collars that didn't stay put. * The fence pins are very soilid, so the jig doesn't move while in place. Other brands have a long knurled screw that wobbles and allows the kiig to move around. * The plate is thick, making it feel sturdy. * It's phyically smaller than the others, because it doesn't have any useless features like euro-hinge hole guides. The case is more compact and stores well. Overall, very satisfied with this jig.

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Reviewed in the United States on April 3, 2026

Verified Purchase

Draper, US

★★★★★ 5

Great product

Great well made product and nice case. Works great for 1/4” holes.

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Reviewed in the United States on May 15, 2026

Verified Purchase

Lori Cook

Natrona Heights, US

★★★★★ 5

A solid and easy to use product.

Worked like a charm. It is extremely durable and easy to use. I bought this item because the one I wanted wasn’t available. I don’t regret getting it.

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Reviewed in the United States on April 22, 2026