In stock


Shipping in 2-4 business days
Free Shipping over $99
Hassle Free Returns

Quick Specs


3/8" NPT male extension for use with Mechanical Temperature gauges only.
Feature Points
  • Constructed from solid brass
California Residents: Prop 65 WARNING prop65 Cancer, Birth Defects and Reproductive Harm


Rated 4 out of 5 by from Perfect for use with water temperature gauge Purchased fitting because male fitting on water temperature gauge was not long enough for use with standard brass fittings.
Date published: 2018-07-20
  • y_2024, m_4, d_17, h_5
  • bvseo_bulk, prod_bvrr, vn_bulk_3.0.41
  • cp_1, bvpage1
  • co_hasreviews, tv_0, tr_1
  • loc_en_US, sid_2271, prod, sort_[SortEntry(order=RELEVANCE, direction=DESCENDING)]
  • clientName_autometer-us
  • bvseo_sdk, p_sdk, 3.2.1
  • CLOUD, getReviews, 8.81ms


Hello ! I wish to mount this adapter on my Chevrolet Impala from 1965 on the rear side left of the engine. What is the thread that goes in the motor block ?

Asked by: B7ST
This adapter is 3/8" NPT male. I advise checking the block, as most GM motors from that time would have a 1/2" NPT port.
Answered by: Jim from AutoMeter
Date published: 2022-07-07

Is a 2271 adapter the correct length to use with a 3332 Auto Meter gage ? what will the assembled probe depth be ?

Asked by: TonyG
Hello TonyG, thank you for your inquiry. That is the correct adapter if the probe is too long for the water jacket.
Answered by: Sarah from AutoMeter
Date published: 2021-08-03

I have a Autometer mechanical temp gauge with 3/8 pipe fitting and need a mounting nut. The engine i as chevy LS and I hace an ICT Billet adapter with a 3/8 female pipe fitting. Do you have a 3/8x3/8 mounting nut or an adapter with mounting nut for LS

Asked by: greencar
Hi, The non-removable sealing nut on all of our mechanical temp gauges is 5/8-18 UNF. The standard 3/8" NPT adapter is 2263: We have no way to adapt our mechanical temp gauges to the LS block. Thanks, Jim
Answered by: Jim from AutoMeter
Date published: 2020-05-15

Im looking for a Brass fitting extension adaptor to suit the stock Magnum V8 gas motor 1998. I have purchased your gauges and now need this adaptor as I only have limited options.

Asked by: Aussie Pauly
Thank you for your inquiry. This extension adapter is 3/8" NPT, which is the typical water port size for Dodge V-8 applications.
Answered by: Jim from AutoMeter
Date published: 2020-03-31

What are the external dimensions of FITTING, Product # 2271

Asked by: jean
Thank you for your inquiry. Total length of this adapter is 2-3/4", and obviously the threads are 3/8" NPT.
Answered by: Jim from AutoMeter
Date published: 2019-12-18

What size is the female end of this fitting? I assume your trans temp sender will screw into it? Also do you have one of these fittings with the male end 5/16? I am tapping into the trans cooler line and have a 5/16 Tee to match the trans cooler line.

Asked by: Manticore
Hi there, thank you for connecting with us. The female end is 5/8-18 UNF, which matches up to the sealing nut on our mechanical temperature gauges. For teeing into a transmission line, we offer our 2287 Transmission Temperature Manifold. This will include the 5/16" compression fittings and a 1/2" NPT port. Our mechanical gauges and electric gauges will each include the 1/2" NPT fitting to adapt to the 2287 Trans Temp Manifold.
Answered by: Matt from AutoMeter
Date published: 2018-03-05

what is overall length of the 2271 extension fitting and the internal diameter of the through hole?

Asked by: R&R fab
Keep in mind this is specifically designed for our mechanical temperature gauge. The overall length is 1.78 inches and the diameter of the opening is .406 inches.
Answered by: Matt from AutoMeter
Date published: 2018-01-08
  • y_2024, m_4, d_17, h_5CST
  • bvseo_bulk, prod_bvqa, vn_bulk_3.0.41
  • cp_1, bvpage1
  • co_hasquestionsanswers, tq_7
  • loc_en_US, sid_2271, prod, sort_[SortEntry(order=LAST_APPROVED_ANSWER_SUBMISSION_TIME, direction=DESCENDING)]
  • clientName_autometer-us
  • bvseo_sdk, p_sdk, 3.2.1
  • CLOUD, getContent, 7.45ms