Drawing of an MJ gasket with two T-bolts and nuts

A drawing of an MJ gasket and T-bolts, and photos of a standard and a blue coated T-bolt. The item number sets the type, size and made.

Item # MGP12 Questions and answers (5)

MJ Gasket and Bolt Packs

The MJ gasket and T-bolts for one mechanical joint, less the gland.

View price list (PDF)

Standard, long, blue and anti-rotation T-bolt packs
Loose MJ and push-on gaskets and T-bolts
See all specifications

Buy as: Gasket and bolt pack

Type: Standard T-bolts

Size: 12 in.

Made: Import

Need a domestic part? Pick Domestic.

Material: As listed

As the price list names it, such as EPDM or nitrile gaskets or blue coated T-bolts. For other materials, ask your regional team.

Your distributor

SIGMA sells through waterworks distributors. Order with item # MGP12.

Quote from SIGMA

Job location

Sends your quote list to the right regional team.

Quantity

Download the MJ Accessories catalog

Need help on the job?

Call 800.999.2550 with the size, the joint and the gasket or bolts you need.

MJ gland packs Price lists and catalog

Everything about this part: 12 in.

Details, specs, every size and the questions buyers ask. Open what you need.

Product detailsWhat it is, highlights and documents

About gasket and bolt packs

A gasket and bolt pack is the MJ gasket and T-bolts for one mechanical joint, less the gland, as the MJ Accessories catalog lists it. This page also carries loose MJ gaskets (standard, EPDM, nitrile, neoprene, SIGMASEAL and transition), push-on gaskets and T-bolts.

Materials, bolt sizes and the price lists are under Specifications.

Highlights

MJ gasket and T-bolts, less the gland
Loose MJ and push-on gaskets and T-bolts

Documents

SpecificationsGasket and bolt pack, Standard T-bolts, 12 in.

Gasket and bolt pack, Standard T-bolts, 12 in.

Item number	MGP12
Item	Gasket and bolt pack, Standard T-bolts
Size	12 in.
Made	Import
Material	As listed
Pressure rating	Not listed
T-bolt size	3/4 x 4 in. T-bolts, per the catalog (MGP12)
Weight, import item (price list)	9 lb
Pack quantity
In the catalog (import item)	MJ Accessories catalog, p. 3
Price list	Import MJ Accessories, effective 1/5/26

What is in the pack

Gasket and bolt pack	MJ gasket and T-bolts, less the gland, per the MJ Accessories catalog
Long T-bolt packs	MJ rubber gasket with long T-bolts, as the import list names them
Anti-rotation packs	MJ gasket, standard T-bolts and 2 anti-rotation T-bolts, as the import list names them
Transition packs	MJ transition gasket and T-bolts, less the gland, per the catalog

Materials and notes

Standard and anti-rotation T-bolts	High-strength, low alloy steel, ASTM A242, bare plain finish with an antirust corrosion preventative coating, per the catalog
Blue coated T-bolts	Fluorocarbon blue coated, as the import list names the loose ones
Gaskets	MJ rubber gaskets, plus EPDM, nitrile and neoprene as listed. For the compound of the standard gasket, or other materials, ask your regional team
Transition gaskets, 14 and 16 in.	Not standard and not pressure rated, per the catalog

Other bolts

Other materials	Stainless 304 and 316, fluoropolymer, galvanized and plated: ask your regional team, per the catalog

From the Import MJ Accessories price list (effective 1/5/26), the Domestic MJ Accessories price list (effective 12/1/25) and the MJ Accessories catalog (May 2024).

Every size and item number14 sizes · item numbers

The sizes that come with the choices picked above. Pick a size to load it.

Gasket and bolt packs, gaskets and T-bolts: item numbers by size
Size	Item #	Weight (lb)
	MGP2	2 lb
	MGP3	3 lb
	MGP4	4 lb
	MGP6	6 lb
	MGP8	7 lb
	MGP10	8 lb
	MGP12	9 lb
	MGP14	14 lb
	MGP16	15 lb
	MGP18	16 lb
	MGP20	20 lb
	MGP24	21 lb
	MGP30	38 lb
	MGP36	46 lb

Item numbers from the Import MJ Accessories price list (effective 1/5/26) and the Domestic MJ Accessories price list (effective 12/1/25). T-bolt sizes are diameter x length. Weights are for the import items, as printed on the import list.

Questions and answers5 questions buyers ask about gaskets and T-bolts

Where do I find the price?

On SIGMA's price lists. Where an item is on a posted list, the View price list button near the top of this page opens it, and every posted list is on the Price Lists page. SIGMA sells through waterworks distributors, and your distributor sets your price. For contract pricing, ask your regional team.

Gland pack or gasket and bolt pack?

A gland pack includes the gland. A gasket and bolt pack does not: the catalog lists it as the MJ bolt and gasket pack, less gland. Both are on the price lists by size.

Which T-bolts?

The price lists carry packs with standard, long, blue and anti-rotation T-bolts. Use what the spec calls for. Per the catalog, the bolts in the standard packs on the price lists run from 5/8 x 3 in. at 3 in. to 1 x 6 in. at 30 and 36 in.

Are push-on gaskets on the price lists?

Yes, 4 to 24 in.: standard and nitrile on the import list, standard on the domestic list. Pick Gasket only, then Push-on gasket.

What are the AIS items on the domestic list?

The Domestic MJ Accessories price list labels some items AIS, and the pickers show them as their own types. For what the AIS label covers on your job, ask your regional team before you order.