Skip to the beginning of the images gallery

Seamless 316 Stainless Steel Tubing, 1.25 Inch OD, 0.12 Inch Thick, 1.01 Inch ID

Description & Features

Designed for demanding industrial applications, this seamless 316 stainless steel tubing offers exceptional durability and corrosion resistance. With an outer diameter of 1.25 inches and a wall thickness of 0.12 inches, it supports a maximum working pressure of 2,400 PSI, making it suitable for high-pressure environments. This tubing features a bright annealed finish, adhering to ASTM A269 standards, ensuring reliability and compliance with industry norms.

The tubing's inner diameter of 1.01 inches allows for efficient fluid flow with a rated capacity of 36.7 GPM. Manufactured by Marmon/Keystone, it boasts a burst pressure of 14,400 PSI, providing a robust solution for various hydraulic systems. Whether used in environments with moderate or severe hydraulic shock and mechanical strain, this tubing is engineered to handle the challenges of industrial use with reliability and precision.

SKU: 1-1/4.120-SS

Supplier Part Number (MPN): 1-1/4.120-SS

Alternate Part Numbers: C1AE35

Specifications

Burst Pressure 14400	Brand Marmon/Keystone	Brand Marmon - Keystone	Pack Size 12.00	UOM FT	I.D. 1.01 in	Inside Area 0.80	Maximum Working Pressure 2400	O.D. 1.25 in	Rated Flow 36.70	Rated Flow 36.7	Safety Factor 6:1	Supplier Part Number 1-1/4.120-SS	Wall Thickness 0.12	Alternate Part Numbers Alternate Part Number C1AE35	Product Weight 1.91 lbs

Similar Products

Model Number	O.D.	Wall Thickness	I.D.	Inside Area	Rated Flow	Maximum Working Pressure	Burst Pressure	Safety Factor
1/4.035-SS Seamless 316 Stainless Tubing	0.25 in	0.035	0.18 in	0.0254	0.9	3500	21000	6:1
1/2.049-SS Seamless 316 Stainless Tubing	0.5 in	0.049	0.402 in	0.1269	6	2450	14700	6:1
1/4.049-SS Seamless 316 Stainless Tubing	0.25 in	0.049	0.152 in	0.0181	0.7	4900	29400	6:1
3/4.065-SS Seamless 316 Stainless Tubing	0.75 in	0.065	0.62 in	0.3018	12	2167	13000	6:1
3/8.049-SS Seamless 316 Stainless Tubing	0.375 in	0.049	0.277 in	0.0602	2.8	3267	19600	6:1
5/8.065-SS Seamless 316 Stainless Tubing	0.5625 in	0.065	0.4325 in	0.1923	9	2600	15600	6:1
1-1/4.120-SS Seamless 316 Stainless Tubing	1.25 in	0.12	1.01 in	0.8008	36.7	2400	14400	6:1
1.109-SS Seamless 316 Stainless Tubing	1 in	0.109	0.788 in	0.4801	22	2725	16350	6:1
1/2.065-SS Seamless 316 Stainless Tubing	0.5 in	0.065	0.37 in	0.1075	4.9	3250	19500	6:1
3/16.035-SS Seamless 316 Stainless Tubing	0.1875 in	0.035	0.1175 in	0.0108	0.4	4667	28000	6:1
3/4.095-SS Seamless 316 Stainless Tubing	0.75 in	0.095	0.56 in	0.2462	11.1	3167	19000	6:1
3/8.035-SS Seamless 316 Stainless Tubing	0.375 in	0.035	0.305 in	0.0731	3.4	2333	14000	6:1

Product Questions & Answers (2)

Question by: Chad J on Dec 18, 2025, 2:55 PM

got a job that calls for 1-1/4 stainless tube, is this the one with a 1.01 id and .120 wall or am i mixin it up

Answer by: Customer Support on Dec 20, 2025, 6:31 AM

The key dimensions on this tubing are 1.25 inch outside diameter, 0.12 inch wall thickness, and 1.01 inch inside diameter. It is seamless bright annealed 316 stainless made to ASTM A269 B90.

Question by: Rex W on Mar 8, 2026, 8:42 AM

what's the max working pressure on this tubing? got a system running around 2000 psi and want to make sure theres enough headroom

Answer by: Customer Support on Mar 9, 2026, 6:47 PM

At 2,000 psi you'd be well within the rated limit. The working pressure on this tubing is 2,400 psi, and that's already calculated using a 6:1 safety factor to account for hydraulic shock and normal mechanical strain. Burst pressure is rated at 14,400 psi, so there's a solid margin built in. For a system sitting around 2,000 psi with typical shock loads, this fits comfortably.