300 lb. Black Pipe Fittings

When 150 lb fittings are the weak link, step up to Class 300 black pipe fittings. You get precision threads and chamfered starts for fast make-up and fewer cross-threads on rugged service lines. Use 45° and 90° elbows or street elbows for tight turns, tees for branches, couplings and reducers for size changes, nipples for runs, caps for dead ends and unions for quick take-apart. We keep Kimball Midwest stock ready.

150 results

Class 300 Black Pipe Nipples

Class 300 Black Pipe 90° Elbows

Class 300 Black Pipe 90° Street Elbows

Class 300 Black Pipe 45° Elbows

Class 300 Black Pipe Tees

Class 300 Black Pipe Caps

Class 300 Black Pipe Couplers

Class 300 Black Pipe Ground Joint Unions

Class 300 Black Pipe Reducing Couplings

Class 300 Black Pipe Nipples

Class 300 black pipe nipples made from malleable iron with precision threads and a black finish. Designed for higher pressure and more rugged service than 150 gauge nipples and meeting Schedule 80 specifications. Suitable for industrial piping and repair tasks.

Pipe Size: 1/8"

Length	Shape	Material	Package Qty	Item #	Price Want to view pricing for this product? Log In or Create Login Not a Kimball Midwest Customer? Register
6"	Nipples	Malleable Iron	1	4336X2	Log in to view price
1/8" x 6" Class 300 Black Pipe Nipple Item #: 4336X2 Package Weight: 0.2 lbs View Product Details Log in to Order

Pipe Size: 1/4"

Length	Shape	Material	Package Qty	Item #	Price Want to view pricing for this product? Log In or Create Login Not a Kimball Midwest Customer? Register
1-1/2"	Nipples	Malleable Iron	5	4327X4	Log in to view price
1/4" x 1-1/2" Class 300 Black Pipe Nipple - 5 Pack Item #: 4327X4 Package Weight: 0.3 lbs View Product Details Log in to Order
2"	Nipples	Malleable Iron	5	4328X4	Log in to view price
1/4" x 2" Class 300 Black Pipe Nipple - 5 Pack Item #: 4328X4 Package Weight: 0.4 lbs View Product Details Log in to Order
2-1/2"	Nipples	Malleable Iron	5	4329X4	Log in to view price
1/4" x 2-1/2" Class 300 Black Pipe Nipple - 5 Pack Item #: 4329X4 Package Weight: 0.5 lbs View Product Details Log in to Order
3"	Nipples	Malleable Iron	5	4330X4	Log in to view price
1/4" x 3" Class 300 Black Pipe Nipple - 5 Pack Item #: 4330X4 Package Weight: 0.6 lbs View Product Details Log in to Order
3-1/2"	Nipples	Malleable Iron	5	4331X4	Log in to view price
1/4" x 3-1/2" Class 300 Black Pipe Nipple - 5 Pack Item #: 4331X4 Package Weight: 0.8 lbs View Product Details Log in to Order
4"	Nipples	Malleable Iron	5	4332X4	Log in to view price
1/4" x 4" Class 300 Black Pipe Nipple - 5 Pack Item #: 4332X4 Package Weight: 0.9 lbs View Product Details Log in to Order
4-1/2"	Nipples	Malleable Iron	5	4333X4	Log in to view price
1/4" x 4-1/2" Class 300 Black Pipe Nipple - 5 Pack Item #: 4333X4 Package Weight: 0.9 lbs View Product Details Log in to Order
5"	Nipples	Malleable Iron	5	4334X4	Log in to view price
1/4" x 5" Class 300 Black Pipe Nipple - 5 Pack Item #: 4334X4 Package Weight: 1 lbs View Product Details Log in to Order
5-1/2"	Nipples	Malleable Iron	5	4335X4	Log in to view price
1/4" x 5-1/2" Class 300 Black Pipe Nipple - 5 Pack Item #: 4335X4 Package Weight: 1.2 lbs View Product Details Log in to Order
6"	Nipples	Malleable Iron	5	4336X4	Log in to view price
1/4" x 6" Class 300 Black Pipe Nipple - 5 Pack Item #: 4336X4 Package Weight: 1.3 lbs View Product Details Log in to Order
Close	Nipples	Malleable Iron	10	4326X4	Log in to view price
1/4" x Close Class 300 Black Pipe Nipple - 10 Pack Item #: 4326X4 Package Weight: 0.3 lbs View Product Details Log in to Order

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Class 300 Black Pipe 90° Elbows

Class 300 black pipe 90° elbows in malleable iron for threaded pipe connections. Precision threads and chamfered openings provide easier engagement and faster installation. Rated for higher pressure service than standard 150 lb fittings and suitable for industrial piping and repair tasks.

Pipe Size	Shape	Material	Package Qty	Item #	Price Want to view pricing for this product? Log In or Create Login Not a Kimball Midwest Customer? Register
1/4"	Elbows	Malleable Iron	3	4500X4	Log in to view price
1/4" Class 300 Black Pipe 90° Elbow - 3 Pack Item #: 4500X4 Package Weight: 0.7 lbs View Product Details Log in to Order
3/8"	Elbows	Malleable Iron	3	4500X6	Log in to view price
3/8" Class 300 Black Pipe 90° Elbow - 3 Pack Item #: 4500X6 Package Weight: 1 lbs View Product Details Log in to Order
1/2"	Elbows	Malleable Iron	2	4500X8	Log in to view price
1/2" Class 300 Black Pipe 90° Elbow - 2 Pack Item #: 4500X8 Package Weight: 1.1 lbs View Product Details Log in to Order
3/4"	Elbows	Malleable Iron	2	4500X12	Log in to view price
3/4" Class 300 Black Pipe 90° Elbow - 2 Pack Item #: 4500X12 Package Weight: 1.7 lbs View Product Details Log in to Order
1"	Elbows	Malleable Iron	2	4500X16	Log in to view price
1" Class 300 Black Pipe 90° Elbow - 2 Pack Item #: 4500X16 Package Weight: 2.6 lbs View Product Details Log in to Order
1-1/4"	Elbows	Malleable Iron	1	4500X20	Log in to view price
1-1/4" Class 300 Black Pipe 90° Elbow Item #: 4500X20 Package Weight: 2.1 lbs View Product Details Log in to Order
1-1/2"	Elbows	Malleable Iron	1	4500X24	Log in to view price
1-1/2" Class 300 Black Pipe 90° Elbow Item #: 4500X24 Package Weight: 2.6 lbs View Product Details Log in to Order
2"	Elbows	Malleable Iron	1	4500X32	Log in to view price
2" Class 300 Black Pipe 90° Elbow Item #: 4500X32 Package Weight: 4.3 lbs View Product Details Log in to Order

Class 300 Black Pipe 90° Street Elbows

Class 300 black pipe 90° street elbows made from malleable iron for higher pressure and rugged service. Precision tapered threads and chamfered openings provide easier engagement and faster installation. Suitable for industrial piping and repair tasks.

Pipe Size	Shape	Material	Package Qty	Item #	Price Want to view pricing for this product? Log In or Create Login Not a Kimball Midwest Customer? Register
1/4"	Street Elbows	Malleable Iron	3	4400X4	Log in to view price
1/4" Class 300 Black Pipe 90° Street Elbow - 3 Pack Item #: 4400X4 Package Weight: 0.6 lbs View Product Details Log in to Order
3/8"	Street Elbows	Malleable Iron	3	4400X6	Log in to view price
3/8" Class 300 Black Pipe 90° Street Elbow - 3 Pack Item #: 4400X6 Package Weight: 1 lbs View Product Details Log in to Order
1/2"	Street Elbows	Malleable Iron	2	4400X8	Log in to view price
1/2" Class 300 Black Pipe 90° Street Elbow - 2 Pack Item #: 4400X8 Package Weight: 1 lbs View Product Details Log in to Order
3/4"	Street Elbows	Malleable Iron	2	4400X12	Log in to view price
3/4" Class 300 Black Pipe 90° Street Elbow - 2 Pack Item #: 4400X12 Package Weight: 1.6 lbs View Product Details Log in to Order
1"	Street Elbows	Malleable Iron	1	4400X16	Log in to view price
1" Class 300 Black Pipe 90° Street Elbow Item #: 4400X16 Package Weight: 1.2 lbs View Product Details Log in to Order
1-1/4"	Street Elbows	Malleable Iron	1	4400X20	Log in to view price
1-1/4" Class 300 Black Pipe 90° Street Elbow Item #: 4400X20 Package Weight: 1.8 lbs View Product Details Log in to Order
1-1/2"	Street Elbows	Malleable Iron	1	4400X24	Log in to view price
1-1/2" Class 300 Black Pipe 90° Street Elbow Item #: 4400X24 Package Weight: 2.5 lbs View Product Details Log in to Order
2"	Street Elbows	Malleable Iron	1	4400X32	Log in to view price
2" Class 300 Black Pipe 90° Street Elbow Item #: 4400X32 Package Weight: 3.9 lbs View Product Details Log in to Order

Class 300 Black Pipe 45° Elbows

Class 300 black pipe 45° elbows made of malleable iron for threaded piping systems. Precision threads and chamfered openings provide easier engagement and faster installation while Class 300 design resists higher pressure and supports more rugged industrial and equipment repair applications.

Pipe Size	Shape	Material	Package Qty	Item #	Price Want to view pricing for this product? Log In or Create Login Not a Kimball Midwest Customer? Register
1/4"	Elbows	Malleable Iron	3	4450X4	Log in to view price
1/4" Class 300 Black Pipe 45° Elbow - 3 Pack Item #: 4450X4 Package Weight: 0.7 lbs View Product Details Log in to Order
3/8"	Elbows	Malleable Iron	3	4450X6	Log in to view price
3/8" Class 300 Black Pipe 45° Elbow - 3 Pack Item #: 4450X6 Package Weight: 1 lbs View Product Details Log in to Order
1/2"	Elbows	Malleable Iron	2	4450X8	Log in to view price
1/2" Class 300 Black Pipe 45° Elbow - 2 Pack Item #: 4450X8 Package Weight: 1 lbs View Product Details Log in to Order
3/4"	Elbows	Malleable Iron	2	4450X12	Log in to view price
3/4" Class 300 Black Pipe 45° Elbow - 2 Pack Item #: 4450X12 Package Weight: 1.5 lbs View Product Details Log in to Order
1"	Elbows	Malleable Iron	1	4450X16	Log in to view price
1" Class 300 Black Pipe 45° Elbow Item #: 4450X16 Package Weight: 1.2 lbs View Product Details Log in to Order
1-1/4"	Elbows	Malleable Iron	1	4450X20	Log in to view price
1-1/4" Class 300 Black Pipe 45° Elbow Item #: 4450X20 Package Weight: 1.8 lbs View Product Details Log in to Order
1-1/2"	Elbows	Malleable Iron	1	4450X24	Log in to view price
1-1/2" Class 300 Black Pipe 45° Elbow Item #: 4450X24 Package Weight: 2.4 lbs View Product Details Log in to Order
2"	Elbows	Malleable Iron	1	4450X32	Log in to view price
2" Class 300 Black Pipe 45° Elbow Item #: 4450X32 Package Weight: 3.8 lbs View Product Details Log in to Order

Class 300 Black Pipe Tees

Class 300 black pipe tees are malleable iron fittings engineered for higher pressure and rugged service compared to standard 150 lb fittings. Precision threads provide easy engagement and chamfered openings help faster installation. Suitable for industrial piping and repair tasks.

Pipe Size	Shape	Material	Package Qty	Item #	Price Want to view pricing for this product? Log In or Create Login Not a Kimball Midwest Customer? Register
1/4"	Tees	Malleable Iron	2	4700X4	Log in to view price
1/4" Class 300 Black Pipe Tee - 2 Pack Item #: 4700X4 Package Weight: 0.6 lbs View Product Details Log in to Order
3/8"	Tees	Malleable Iron	2	4700X6	Log in to view price
3/8" Class 300 Black Pipe Tee - 2 Pack Item #: 4700X6 Package Weight: 1 lbs View Product Details Log in to Order
1/2"	Tees	Malleable Iron	2	4700X8	Log in to view price
1/2" Class 300 Black Pipe Tee - 2 Pack Item #: 4700X8 Package Weight: 1.5 lbs View Product Details Log in to Order
3/4"	Tees	Malleable Iron	1	4700X12	Log in to view price
3/4" Class 300 Black Pipe Tee Item #: 4700X12 Package Weight: 1.2 lbs View Product Details Log in to Order
1"	Tees	Malleable Iron	1	4700X16	Log in to view price
1" Class 300 Black Pipe Tee Item #: 4700X16 Package Weight: 1.8 lbs View Product Details Log in to Order
1-1/4"	Tees	Malleable Iron	1	4700X20	Log in to view price
1-1/4" Class 300 Black Pipe Tee Item #: 4700X20 Package Weight: 2.7 lbs View Product Details Log in to Order
1-1/2"	Tees	Malleable Iron	1	4700X24	Log in to view price
1-1/2" Class 300 Black Pipe Tee Item #: 4700X24 Package Weight: 3.7 lbs View Product Details Log in to Order
2"	Tees	Malleable Iron	1	4700X32	Log in to view price
2" Class 300 Black Pipe Tee Item #: 4700X32 Package Weight: 5.8 lbs View Product Details Log in to Order

Class 300 Black Pipe Caps

Class 300 black pipe caps made of malleable iron for threaded pipe. Precision threads and chamfered openings provide easier engagement and faster installation. Rated for higher pressure service than standard 150 lb fittings and conform to common industry standards.

Pipe Size	Shape	Material	Package Qty	Item #	Price Want to view pricing for this product? Log In or Create Login Not a Kimball Midwest Customer? Register
1/4"	Pipe Caps	Malleable Iron	1	4130X4	Log in to view price
1/4" Class 300 Black Pipe Cap Item #: 4130X4 Package Weight: 0.2 lbs View Product Details Log in to Order
3/8"	Pipe Caps	Malleable Iron	1	4130X6	Log in to view price
3/8" Class 300 Black Pipe Cap Item #: 4130X6 Package Weight: 0.2 lbs View Product Details Log in to Order
1/2"	Pipe Caps	Malleable Iron	1	4130X8	Log in to view price
1/2" Class 300 Black Pipe Cap Item #: 4130X8 Package Weight: 0.3 lbs View Product Details Log in to Order
3/4"	Pipe Caps	Malleable Iron	1	4130X12	Log in to view price
3/4" Class 300 Black Pipe Cap Item #: 4130X12 Package Weight: 0.5 lbs View Product Details Log in to Order
1"	Pipe Caps	Malleable Iron	1	4130X16	Log in to view price
1" Class 300 Black Pipe Cap Item #: 4130X16 Package Weight: 0.8 lbs View Product Details Log in to Order
1-1/4"	Pipe Caps	Malleable Iron	1	4130X20	Log in to view price
1-1/4" Class 300 Black Pipe Cap Item #: 4130X20 Package Weight: 1.1 lbs View Product Details Log in to Order
1-1/2"	Pipe Caps	Malleable Iron	1	4130X24	Log in to view price
1-1/2" Class 300 Black Pipe Cap Item #: 4130X24 Package Weight: 1.4 lbs View Product Details Log in to Order
2"	Pipe Caps	Malleable Iron	1	4130X32	Log in to view price
2" Class 300 Black Pipe Cap Item #: 4130X32 Package Weight: 2.3 lbs View Product Details Log in to Order

Class 300 Black Pipe Couplers

Class 300 black pipe couplers made of malleable iron for higher pressure and rugged service than standard 150 lb fittings. Precision threads provide easy engagement with threaded pipe and chamfered openings help faster installation. Meets ASTM A197 and ANSI/ASME B16.3 and B1.20.1.

Pipe Size	Shape	Material	Package Qty	Item #	Price Want to view pricing for this product? Log In or Create Login Not a Kimball Midwest Customer? Register
1/4"	Couplings	Malleable Iron	5	4300X4	Log in to view price
1/4" Class 300 Black Pipe Coupling - 5 Pack Item #: 4300X4 Package Weight: 1 lbs View Product Details Log in to Order
3/8"	Couplings	Malleable Iron	5	4300X6	Log in to view price
3/8" Class 300 Black Pipe Coupling - 5 Pack Item #: 4300X6 Package Weight: 1.5 lbs View Product Details Log in to Order
1/2"	Couplings	Malleable Iron	3	4300X8	Log in to view price
1/2" Class 300 Black Pipe Coupling - 3 Pack Item #: 4300X8 Package Weight: 1.5 lbs View Product Details Log in to Order
3/4"	Couplings	Malleable Iron	3	4300X12	Log in to view price
3/4" Class 300 Black Pipe Coupling - 3 Pack Item #: 4300X12 Package Weight: 2.3 lbs View Product Details Log in to Order
1"	Couplings	Malleable Iron	2	4300X16	Log in to view price
1" Class 300 Black Pipe Coupling - 2 Pack Item #: 4300X16 Package Weight: 2.2 lbs View Product Details Log in to Order
1-1/4"	Couplings	Malleable Iron	2	4300X20	Log in to view price
1-1/4" Class 300 Black Pipe Coupling - 2 Pack Item #: 4300X20 Package Weight: 3.7 lbs View Product Details Log in to Order
1-1/2"	Couplings	Malleable Iron	1	4300X24	Log in to view price
1-1/2" Class 300 Black Pipe Coupling Item #: 4300X24 Package Weight: 2.3 lbs View Product Details Log in to Order
2"	Couplings	Malleable Iron	1	4300X32	Log in to view price
2" Class 300 Black Pipe Coupling Item #: 4300X32 Package Weight: 3.8 lbs View Product Details Log in to Order

Class 300 Black Pipe Ground Joint Unions

Class 300 black pipe ground joint unions made from malleable iron for higher pressure and rugged service. Precision threads and chamfered openings provide easier engagement and faster installation. Meets ASTM A197 and ANSI/ASME B16.3 for industrial and repair tasks.

Pipe Size	Shape	Material	Package Qty	Item #	Price Want to view pricing for this product? Log In or Create Login Not a Kimball Midwest Customer? Register
1/4"	Unions	Malleable Iron	1	4250X4	Log in to view price
1/4" Class 300 Black Pipe Ground Joint Union Item #: 4250X4 Package Weight: 0.3 lbs View Product Details Log in to Order
3/8"	Unions	Malleable Iron	1	4250X6	Log in to view price
3/8" Class 300 Black Pipe Ground Joint Union Item #: 4250X6 Package Weight: 0.4 lbs View Product Details Log in to Order
1/2"	Unions	Malleable Iron	1	4250X8	Log in to view price
1/2" Class 300 Black Pipe Ground Joint Union Item #: 4250X8 Package Weight: 0.6 lbs View Product Details Log in to Order
3/4"	Unions	Malleable Iron	1	4250X12	Log in to view price
3/4" Class 300 Black Pipe Ground Joint Union Item #: 4250X12 Package Weight: 1.1 lbs View Product Details Log in to Order
1"	Unions	Malleable Iron	1	4250X16	Log in to view price
1" Class 300 Black Pipe Ground Joint Union Item #: 4250X16 Package Weight: 1.3 lbs View Product Details Log in to Order
1-1/4"	Unions	Malleable Iron	1	4250X20	Log in to view price
1-1/4" Class 300 Black Pipe Ground Joint Union Item #: 4250X20 Package Weight: 2.2 lbs View Product Details Log in to Order
1-1/2"	Unions	Malleable Iron	1	4250X24	Log in to view price
1-1/2" Class 300 Black Pipe Ground Joint Union Item #: 4250X24 Package Weight: 2.6 lbs View Product Details Log in to Order
2"	Unions	Malleable Iron	1	4250X32	Log in to view price
2" Class 300 Black Pipe Ground Joint Union Item #: 4250X32 Package Weight: 4.2 lbs View Product Details Log in to Order

Class 300 Black Pipe Reducing Couplings

Class 300 black pipe reducing couplings manufactured from malleable iron for higher pressure and rugged service. Precision threads and chamfered openings provide easier engagement and faster installation. Common use includes industrial piping and equipment repair tasks.

Pipe Size	Shape	Material	Package Qty	Item #	Price Want to view pricing for this product? Log In or Create Login Not a Kimball Midwest Customer? Register
3/8" x 1/4"	Couplings	Malleable Iron	3	4300X6X4	Log in to view price
3/8" x 1/4" Class 300 Black Pipe Reducing Coupling - 3 Pack Item #: 4300X6X4 Package Weight: 0.8 lbs View Product Details Log in to Order
1/2" x 1/4"	Couplings	Malleable Iron	2	4300X8X4	Log in to view price
1/2" x 1/4" Class 300 Black Pipe Reducing Coupling - 2 Pack Item #: 4300X8X4 Package Weight: 0.7 lbs View Product Details Log in to Order
1/2" x 3/8"	Couplings	Malleable Iron	2	4300X8X6	Log in to view price
1/2" x 3/8" Class 300 Black Pipe Reducing Coupling - 2 Pack Item #: 4300X8X6 Package Weight: 0.8 lbs View Product Details Log in to Order
3/4" x 1/2"	Couplings	Malleable Iron	2	4300X12X8	Log in to view price
3/4" x 1/2" Class 300 Black Pipe Reducing Coupling - 2 Pack Item #: 4300X12X8 Package Weight: 1.2 lbs View Product Details Log in to Order
1" x 1/2"	Couplings	Malleable Iron	2	4300X16X8	Log in to view price
1" x 1/2" Class 300 Black Pipe Reducing Coupling - 2 Pack Item #: 4300X16X8 Package Weight: 1.6 lbs View Product Details Log in to Order
1" x 3/4"	Couplings	Malleable Iron	2	4300X16X12	Log in to view price
1" x 3/4" Class 300 Black Pipe Reducing Coupling - 2 Pack Item #: 4300X16X12 Package Weight: 1.7 lbs View Product Details Log in to Order
1-1/4" x 3/4"	Couplings	Malleable Iron	1	4300X20X12	Log in to view price
1-1/4" x 3/4" Class 300 Black Pipe Reducing Coupling Item #: 4300X20X12 Package Weight: 1.3 lbs View Product Details Log in to Order
1-1/4" x 1"	Couplings	Malleable Iron	1	4300X20X16	Log in to view price
1-1/4" x 1" Class 300 Black Pipe Reducing Coupling Item #: 4300X20X16 Package Weight: 1.4 lbs View Product Details Log in to Order
1-1/2" x 1"	Couplings	Malleable Iron	1	4300X24X16	Log in to view price
1-1/2" x 1" Class 300 Black Pipe Reducing Coupling Item #: 4300X24X16 Package Weight: 1.7 lbs View Product Details Log in to Order
1-1/2" x 1-1/4"	Couplings	Malleable Iron	1	4300X24X20	Log in to view price
1-1/2" x 1-1/4" Class 300 Black Pipe Reducing Coupling Item #: 4300X24X20 Package Weight: 1.9 lbs View Product Details Log in to Order
2" x 1-1/2"	Couplings	Malleable Iron	1	4300X32X24	Log in to view price
2" x 1-1/2" Class 300 Black Pipe Reducing Coupling Item #: 4300X32X24 Package Weight: 3 lbs View Product Details Log in to Order