Swagelok SS-4-HLN-4.00 is a stainless steel hex long nipple pipe fitting. It is manufactured from 316 stainless steel and features 1/4 in. male NPT connections on both ends, with an overall length of 4 inches (10.2 cm).

This close nipple fitting enables compact, inline pipe connections in tight spaces. It is ideal for critical piping systems and dense assemblies requiring reliable sealing. The fitting undergoes a Standard Cleaning and Packaging (SC-10) process prior to delivery.

Specifications

Specification	Value
Body Material	316 Stainless Steel
Cleaning Process	Standard Cleaning and Packaging (SC-10)
Connection 1 Size	1/4 in.
Connection 1 Type	Male NPT
Connection 2 Size	1/4 in.
Connection 2 Type	Male NPT
Feature	Length 4"
Flow Restrictor	No
Length	4 in. (10.2 cm)
eClass (4.1)	37021016
eClass (5.1.4)	37020590
eClass (6.0)	22560206
eClass (6.1)	37020590
eClass (10.1)	37020590
UNSPSC (4.03)	40141715
UNSPSC (10.0)	40173303
UNSPSC (11.0501)	40142318
UNSPSC (13.0601)	40173303
UNSPSC (15.1)	40173303
UNSPSC (17.1001)	40173303

System Design and Selection

The complete catalog contents must be reviewed to ensure that the system designer and user make a safe product selection. When selecting products, the total system design must be considered to ensure safe, trouble-free performance. Function, material compatibility, adequate ratings, proper installation, operation, and maintenance are the responsibilities of the system designer and user.