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Check Circle Seal Aviation Parts Catalog | Find Required Part

If you’re in need of parts from quality aviation manufacturers such as Circle Seal, look no further than Internet of NSN, an all-inclusive purchasing platform for parts and components within the aerospace, civil aviation, and defence industries. Owned and operated by ASAP Semiconductor, we have access to an inventory of more than two billion new, obsolete, in-demand, and hard to find parts of Circle Seal such as 6130 SP, 12179A, 4012-20, EM95-4, 25120-1 and many more. Furthermore, our vast and diverse international supply chain network, which spans the United States allows us to offer short lead times and competitive prices on everything we sell. Internet of NSN is an AS9120B, ISO 9001:2015, and FAA AC-0056B accredited business, as well the only independent distributor with a strict no China sourcing policy, ensuring that each part we sell is fully traceable or comes directly from its manufacturer. Begin the purchasing process immediately by submitting an RFQ today.
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Part No Item Name Availability RFQ
6130 SP check v2 fuse Yes RFQ
12179A housing Yes RFQ
4012-20 o ring Yes RFQ
EM95-4 m o valve Yes RFQ
25120-1 spring Yes RFQ
17323 kit mod mc99 43 Yes RFQ
4012-34 o ring Yes RFQ
6042 black wire Yes RFQ
HV-127 housing Yes RFQ
1061 nameplate Yes RFQ
25118A spring seat Yes RFQ
PR05-10 valve regulating fluid pressure Yes RFQ
RV99-199 relief valve Yes RFQ
34258 idler gear Yes RFQ
CV-501 poppet Yes RFQ
X2350-0075 actuator Yes RFQ
4012-62-Q q quad ring Yes RFQ
91800-17-2 crystal Yes RFQ
4606 o ring Yes RFQ
10517T poppet Yes RFQ
33447 spring Yes RFQ
10193A poppet Yes RFQ
17322 kit mod em91 80 Yes RFQ
9539B-1PP valve Yes RFQ
10010-100-20 spring Yes RFQ
31295 body Yes RFQ
91800-17-4 crystal Yes RFQ
12608A(L(070 body Yes RFQ
6057 connector Yes RFQ
P24-791-1 fuel shutoff Yes RFQ
4020-77 o ring Yes RFQ
10010-101-10 spring Yes RFQ
23040503 helicoil Yes RFQ
MS21043-04 nut self locking Yes RFQ
ZCV175-1 check valve Yes RFQ
10293T backup ring Yes RFQ
10517A poppet Yes RFQ
869A-12TT check valve Yes RFQ
6911 screw Yes RFQ
34121 toggle Yes RFQ
23010739SC screw Yes RFQ
4010-19-Q q quad ring Yes RFQ
2350-0082 actuator Yes RFQ
P66-526 valve Yes RFQ
P54-228 bleed valve Yes RFQ
31488TP end Yes RFQ
31378 spring Yes RFQ
RV99-162 relief valve Yes RFQ
36460 spring seat Yes RFQ
30455A plunger Yes RFQ
CV99-237 check unloader Yes RFQ
22410196 flange Yes RFQ
4010-20 o ring Yes RFQ
33507 plug Yes RFQ
6358 retainer ring Yes RFQ
02HV08-1 handle Yes RFQ
4015-24 o ring Yes RFQ
10722 ball Yes RFQ
153T poppet Yes RFQ
8213 backup ring Yes RFQ
CV-462AB insert Yes RFQ
18442 body assembly Yes RFQ
532T-1M-140 relief valve Yes RFQ
12101A end Yes RFQ
4112-16 o ring Yes RFQ
4119-34 o ring Yes RFQ
34262 planet gear Yes RFQ
W2350-0074 actuator Yes RFQ
P128-350-1 shutoff valve Yes RFQ
176T end Yes RFQ
34261 bearing Yes RFQ
33870 nut Yes RFQ
P16-736 check valve Yes RFQ
P71-228 bleed valve Yes RFQ
EM95-6 valve Yes RFQ
CV-491CK44 housing Yes RFQ
18494 clutch shaft Yes RFQ
18851 piston assembly Yes RFQ
279A-6EE check valve Yes RFQ
34041 spring Yes RFQ

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Quality guaranteed We sell only warrantied and traceable parts

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Semiconductor's Certifications and Memberships


The only independent
distributor with a
NO CHINA SOURCING Pledge
  • All parts are stocked in the USA.
  • All parts are shipped from the USA.
  • All shipments must comply with U.S.A export laws.
  • No exceptions.
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