Danfoss 3R21

COUPLING,RL,F,3/8,CS,-6NPT,NBR

MPN
3R21
Price and lead time confirmed within 1 business day
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A real person replies, typically within 1 business day — see our privacy policy.

What happens next
  1. We check stock, condition and lead time
  2. You get a written quote by email
  3. Approve it and we ship — in-stock parts within 1 business day
  • 12-month warranty (new) · 3-month (used/refurbished)
  • 30-day returns, no restocking fee on unused parts
  • Ships via
  • 100% positive eBay feedback

Have spare Danfoss (Drives) parts? We buy surplus →

What is the Danfoss 3R21?

Danfoss COUPLING,RL,F,3/8,CS,-6NPT,NBR, manufacturer part number 3R21. Sourced on request from PartnerPLC — contact us to check availability, condition and lead time.

Specifications

Specifications

EAN/UPC678146137890
Angle shapeStraight
Body size3/8
End size 1-6
End type 1Female pipe (NPTF)
Finish platingZinc trivalent
Fluid compatibilityCompressed air
Hex size 1 IN1.000
Item typeFemale half
Latch typePush/pull
Product length in2.350
Product materialCarbon steel
Safety locking mechanismRing lock
Seal materialNitrile (NBR)
Thread size 13/8-18 NPTF
Working pressure max psi300
Working temperature max F250
Working temperature min F-40

3R21: frequently asked questions

When can 3R21 be shipped?

3R21 is sourced on request — request a quote and we'll confirm the exact availability and shipping timeline for this specific unit.

Can I pick up 3R21 in person?

Local pickup from our Groningen, Netherlands warehouse may be possible — contact us before ordering to check availability and arrange a collection time.

Is express delivery available?

Yes — mention it when you request a quote for 3R21 and we'll include express shipping options in our reply.

My factory is down and I need this urgently — can you help?

For a critical breakdown, contact us directly at +31 (0)50-7110348 or sales@partnerplc.com — we can look into same-day courier or dedicated taxi/hotshot delivery for 3R21, subject to availability and destination.

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Danfoss 3R21Price and lead time confirmed within 1 business day
Request a Quote