A TSO (Technical Standard Order) is a minimum performance standard for specified materials, parts, and appliances used on civil aircraft. When a manufacturer is authorized to produce a material, part, or appliance to a TSO standard, it is referred to as TSO authorization. For TSO parts like TSO-C4C, TSO-C40C, TSO-C35D, TSO-C126, TSO-C4C, Purchasing Union is here to help. Owned and operated by ASAP Semiconductor, we have access to an inventory of more than two billion new and obsolete parts for the aerospace, civil aviation, and defense industries, all available with short lead times and competitive prices. For parts not in our inventory, our team of dedicated account managers can efficiently track them down though our extensive international supply chain network that spans North America and Europe. To begin the purchasing process immediately, submit an RFQ below. Sales representatives are standing by and will respond to your inquiries in 15 minutes or less, 24/7/365.

TSO Number	TSO Holder Name	TSO Title	Part Model Number/Name	RFQ
tso-c4c	aspen avionics	efd1000-500 map executable obj	302-00007-(),	RFQ
tso-c40c	ups aviation technologies	vhf nav/comm	model apollo sl30 p/n 430-6040-3[xx],	RFQ
tso-c35d	l-3 communications avioni	black bezel, internal attitude	gh-3900.2, p/n 9200-34600-0201(first in series),	RFQ
tso-c126	honeywell	elt	rescu 406, p/n 1151324-( ),	RFQ
tso-c4c	avidyne corporation	gps software	pn 530-00196-( ), 530-00196-( ),	RFQ
tso-c148	alcoa fastening systems	stud - ring locked series	s( )f111-( )sn( )(a)-eo308,	RFQ
tso-c34e	rockwell international av	ils glide slope receiving equi	822-1084-202, 822-1152-130, 822-1152-121, 822-1152-130, 822-1465-001, 822-1444-012, 822-1255-502, 822-1152-003, 822-1444-011, 822-1084-304, 822-1084-406, 822-1084-404, 822-1084-402, 822-1084-306, 822-1084-460, 822-1084-302, 822-1084-208, 822-1084-208, 822-1084-204, 822-1467-001, 822-1084-408, 822-11	RFQ
tso-c127a	c&d zodiac	double y-belt seat assembly	41192031-111, -112,	RFQ
tso-c127a	b/e aerospace inc.	lh exit tpl, 0 recline, 6" bmf	be16.0-3-60, 1012660-007,	RFQ
tso-c63b	telephonics	color weather radar system	4001294, model in-2025b rdr 1400c, p/n 4001670-( ), 4001295,	RFQ
tso-c39c	timco aerosystems	seat assy.,triple, nrw, l/h, h	b1010ss, p/n 70793-451-( ), b1010ss, p/n 70793-451-( ), b1010ss, p/n 70793-451-( ),	RFQ
tso-c127a	timco aerosystems	seat assy., triple, f/r, b3100	model b3100, p/n 70778-402-( ),	RFQ
tso-c69c	air cruisers	offwing emergency evacuation s	model bd-500, p/n 68332-( ),	RFQ
tso-c142a	orolia s.a.s.	mounting bracket integra af	p/n s1850551-04,	RFQ
tso-c148	alcoa fastening systems	special, captive screw, miscel	ca13090-1032-( ), ca13098-1032-( ), ca13079-1032-( ), ca13074-( ), ca13058, ca1447, ca28121-( ), ca28026-( ), ca5000-4-( )-( ), ca5001-3-0600, ca30045, ca30046-( ), ca28181-( ), ca12018, ca12020-( ), ca12010-( ), ca12128,	RFQ
tso-c50c	northern airborne technol	derivative	aa95-xxx, -853, aa95-xxx, -866,	RFQ
tso-c5e	honeywell international i	field loadable aircraft specif	p/n nh2205( ) where nh2205ba01 is the first in a series,	RFQ
tso-c165	aspen avionics	efd1000-500 map executable obj	302-00007-[ ],	RFQ
tso-c148	alcoa fastening systems	erco lighting captive nut assy	erco6500-( )-( )-( ),	RFQ
tso-c127a	timco aerosystems	seat assy., double, front row,	b2054, p/n 70823-402-( ), b2054, p/n 70823-402-( ), b2054, p/n 70823-402-( ),	RFQ
tso-c39b	c&d zodiac inc	double seat assembly exit row	41033002-106, 41033002-105,	RFQ
tso-c35d	l-3 communications avioni	black bezel, internal attitude	gh-3900.2, p/n 9200-34500-0201(first in series),	RFQ
tso-c142a	ultralife corporation	lithium dioxide battery	s00313,	RFQ
tso-c10b	rockwell collins	control tuning panel	model ctp-6000, p/n 822-2493-001,	RFQ
tso-c35d	rockwell collins	adaptive flight display runtim	model afdr-6500, p/n 810-0180-003, model afdr-6500, p/n 810-0180-002,	RFQ
tso-c66c	l-3 communications avioni	gray bezel, external air data	gh-3900.2, p/n 9200-34700-0101(first in series),	RFQ
tso-c39b	ki holdings co., ltd.	dbl std ctr rh w/o lh side arm	ars-647, p/n 83253b11199-420, ars-647, p/n 83253b15483-420, ars-694, p/n 83266b13012-412,	RFQ
tso-c139	nat seattle, inc.	area micropone preamplifier	model 265-[], 265-[004 mod c], model 265-[], 265-001, model 265-[], 265-[003 mod a,b,c], model 265-[], 265-[000 mod a,c], model 265-[], 265-[002 mod a,c],	RFQ
tso-c44a	eldec corporation	pwg assembly	pl9-115148, (eco) 512509,	RFQ
tso-c179	mid-continent instrument	rechargeable lithium cells and	md835-( ),	RFQ
tso-c39b	ki holdings co., ltd.	first class seat double narrow	ars-480, p/n 83-204b6155-409, ars-480, p/n 83-204b6155-411, ars-480, p/n 83-204b6155-413, ars-480, p/n 83-204b6155-415, ars-480, p/n 83-204b6155-407, ars-480, p/n 83-204b6155-401, ars-480, p/n 83-204b6155-403, ars-480, p/n 83-204b6155-405, ars-397, p/n 183-5498-403,	RFQ
tso-c52a	telephonics	connector kit	3605830-4611, 3605839-1031, 3605984-0502, 3614379-5201, ml211b, 3605984-0502,	RFQ
tso-c127a	ki holdings co., ltd.	tpl lh i/a 1.5 in nrw with pro	y21a23, p/n y2151a25404-401,	RFQ
tso-c72c	regent aerospace corp.	bottom cushion assembly, narro	885788-07,	RFQ
tso-c127a	ki holdings co., ltd.	dbl rh with break-over	ars-857, p/n 83296b18630-404,	RFQ
tso-c40c	avidyne corporation	integrated flight display, mpi	530-00207-( ),	RFQ
tso-c6d	bae systems	integrated sensor unit	p/n 445000-( )-( ),	RFQ
tso-c127a	ki holdings co., ltd.	tpl lh 2.7 in nrw no rec with	ars-849, p/n y7157b3a411-401,	RFQ
tso-c10b	avidyne corporation	integrated flight display, ada	530-00209-( ),	RFQ
tso-c117a	honeywell international i	mk v and mk vii enhanced groun	965-0976-040-xxx-xxx, 965-1076-001-xxx-xxx, 965-0976-060-xxx-xxx, 965-0976-020-xxx-xxx, 965-0976-003-xxx-xxx, 965-1676-0xx, 965-1690-0xx, 965-1076-030-xxx-xxx, 965-1076-020-xxx-xxx, 965-1076-060-xxx-xxx, 965-1076-040-xxx-xxx,	RFQ
tso-c127a	brice manufacturing co.	seat assy., triple, e/r, no re	b1010s, 70784-401-( ),	RFQ
tso-c26a	cessna aircraft co. mccau	wheel/brake assembly	d-30039-x,	RFQ
tso-c43c	electronics international	multi-functional display unit	mvp-50t-( ),	RFQ
tso-c39c	pac seating system, inc.	single place side facing divan	model (f)d1229-( ), model (f)d1228-( ), model (f)d1227-( ),	RFQ
tso-c44c	cmc electronics inc.	fms operational software	169-615186-003,	RFQ
tso-c119a	acss	directional antenna	7514060-( ),	RFQ
tso-c35d	s-tec corporation	mkr-350, marker beacon receive	609106-(),	RFQ
tso-c34e	rogerson kratos aviation	electronic flight instrument s	160e050,	RFQ
tso-c72c	timco aerosystems	uph. cushion assy., bottom, 19	7500, p/n 69001-451, 7500, p/n 69001-451, 7500, p/n 69001-451,	RFQ
tso-c39b	precision aircraft compon	aft one place seat	model 1900a-( ),	RFQ
tso-c39c	ki holdings co., ltd.	tpl rh i/a with prox light (ar	ars-869, p/n 83304b20420-404,	RFQ
tso-c127a	c&d zodiac	double y-belt, sliding foodtra	41192031-113, -114,	RFQ
tso-c127a	flight line products, llc	double standard lhs seat assem	pb3-2006, pb3co-10041-401,	RFQ
tso-c127	recaro aircraft seating	seat	forward facing passenger 3410-2-( ), forward facing passenger 3410-4-( ), forward facing passenger 3410-5-( ),	RFQ
tso-c6d	northrop grumman, litton	ltn-91/90-100 msu	463884-01, 461630-02,	RFQ
tso-c39a	ki holdings co., ltd.	economy class triple standard	ars-276, p/n 117-1320-434f,	RFQ
tso-c151b	chelton flight systems	j1 backshell adapter size 17	42-007010-[ ],	RFQ
tso-c127a	b/e aerospace inc.	lh tpl, track adaptor	87995511, ba3.23-3-59,	RFQ
tso-c39c	ki holdings co., ltd.	tpl ctr with pc	ars-671, p/n y5151b6j141-401,	RFQ
tso-c135a	goodrich aircraft wheels	goodrich brake assembly	p/n 2-1778( ),	RFQ
tso-c127a	recaro aircraft seating a	lh tpl, front row, iat	3510f930-31z211,	RFQ
tso-c154c	aviation communication &	ngt-9000rd release 1 configura	p/n 9029000-40000,	RFQ
tso-c144	comant industries, inc.	comdat iridium/gps antenna	ci 490-1 series,	RFQ
tso-c39b	contour premium aircraft	aircraft seats and berths	m78203-001-036, m78203-001-035, m78203-001-033, m78203-001-032, m78203-001-031, m78211-001-015, m20202-001-xxx, m78211-001-011, m78211-001-016, m78211-001-017, m78211-001-013, m78211-001-019, m78211-001-020, m78211-001-021, m78211-001-022, m78211-001-012, m78203-001-037, m78203-001-028, m20301-001-x	RFQ
tso-c44a	eldec corporation	pick-off coil assy	9-231104-01, (eco) 512266, 9-231104-01, (eco) 512337,	RFQ
tso-c127a	timco aerosystems	seat assy., triple, f/r, conve	model 3200, p/n 3203030-501-( ),	RFQ
tso-c113	honeywell uk ltd. (skyfor	sentinel remote processor (no	ob3001-009,	RFQ
tso-c34e	avidyne corporation	integrated flight display, gps	530-00196-( ),	RFQ
tso-c26b	meggitt aircraft braking	tail wheel assy	9531924,	RFQ
tso-c165	avidyne corporation	release 9.3 adahrs software	p/n 530-00209-( ),	RFQ
tso-c148	fairchild fasteners	sealing cap	model 4-ps2c,	RFQ
tso-c127a	decrane aircraft seating	forward/aft facing seat	model 4048,	RFQ
tso-c148	alcoa fastening systems	anchor nut, corner, proc.spec.	km3000-(*),	RFQ
tso-c50c	wulfsberg electronics div	-009 derivative, switch panel	802-809,	RFQ
tso-c31d	rockwell international av	high frequency (hf) radio comm	822-0074-204, 822-0074-210, 822-0002-228, 822-0002-222, 822-0002-210, 622-8111-004, 622-8111-005, 622-8111-006, 622-9852-208, 622-9852-224, 822-0990-004, 822-0923-032, 822-1626-703, 822-1626-503, 822-1626-103, 822-1626-303,	RFQ
tso-c124a	l-3 communications, aviat	fa2500 solid state combined vo	model fa2500cvdr dasu p/n dasu( ),	RFQ
tso-c74d	avidyne corporation	fpsm software	530-00208-( ),	RFQ
tso-c127a	hubei ali-jiatai aircraft	left-hand triple, in-arm foodt	p/n kky400-0931-111,	RFQ
tso-c39a	ki holdings co., ltd.	business class double standard	ars-357, p/n 171-3786-401,	RFQ
tso-c127a	ki holdings co., ltd.	seat top assy -dbl lh with b/o	ars-837, p/n ya3tg-20037-425,	RFQ
tso-c69c	air cruisers company	slide/raft type ii, model 777-	65342-( ),	RFQ
tso-c30c	whelen engineering compan	led position / strobe light as	90375( ), model 90340( ),	RFQ
tso-c127a	ki holdings co., ltd.	tpl rh std 2.5 in nrrw lrw 4.0	y11b73, p/n y1151b7c343-404,	RFQ
tso-c90c	advanced composite struct	cargo container	model ake-4sc, p/n 12500-001-xxx,	RFQ
tso-c62e	off highway tire programs	aircraft tire, 15x6.0-6 3410 l	156k23b1,	RFQ
tso-c148	alcoa fastening systems	avionic hold-down mechanisms s	ca1270-( ), ca1270b-( ), ca1274b-( ), ca1282-( ), ca1283-( ), ca1286-( ), ca12145-( ), ca1260-6-1, hd11074-( ), hd12031-( ), hd11090-( ), hd11091-( ), hd11097-( ), hd11098-( ), hd12000-( ), hd12003-( )-( ), hd12004-( ), hd12006-( ), hd12008-( ), hd12010-( ), hd12029-( ), hd12037-( ), hd12055-( ), hd	RFQ
tso-c119b	rockwell international av	integrated modular avionics ta	pn 810-0181-1t0001,	RFQ
tso-c132	rockwell collins	satcom antenna adapter,	model saa-2100, p/n rcpn 866-0105-050,	RFQ
tso-c127a	timco aerosystems	seat assy., double, offset, b/	b2054, p/n 70823-406-( ), b2054, p/n 70823-406-( ), b2054, p/n 70823-406-( ),	RFQ
tso-c127a	ki holdings co., ltd.	tpl ctr with 0.8 in nrw seat b	yh1b73, p/n yh151b74412-401,	RFQ