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4310-00-494-4445 (IR10-600T49)

4310-00-494-4445 is equivalent to manufacture part number 3W11969. It is a gage valve and is classified under Federal Supply Class 4310 (4310 - Compressors and Vacuum Pumps), stocked for defense, aerospace, MRO, and industrial maintenance applications. This item is cataloged in the NATO supply system under 4310 - Compressors and Vacuum Pumps and is available through NSN-PARTS for U.S. government MRO, and commercial procurement.

NSN: 4310004944445
ALT NSN: 4310-00-494-4445
NIIN: 00-494-4445
NCB: 00
FSC: 4310
NSIN: 494-4445
MNF PART: 3W11969
DESC: GAGE VALVE
ALT DESC: GAGE VALVE
MNF ALT's: 3W11969 | F4469PC128 | F4688PC49 | F4689PC49 | H5658PC35 | H5983PC64 | IR10-600T49 | N334PC49 | N335PC49 | N341PC49 | N353PC49 | N358PC49 | N359PC49 | N365PC49 | N409PC49 | N410PC49 | N416PC49 | N439PC49 | N440PC49 | N446PC49 | N451PC49 | N452PC49 | N458PC49 | N475PC49 | N476PC49 | N482PC49 | N499PC49 | N500PC49 | N506PC49 | N513PC49 | N514PC49 | N520PC49 | N533PC49 | N534PC49 | N540PC49 | N565PC49 | N566PC49 | N572PC49 | N598PC49 | N599PC49 | N605PC49
OTHER ALT's: 3W11969 | F4469PC128 | F4688PC49 | F4689PC49 | H5658PC35 | H5983PC64 | IR10600T49 | N334PC49 | N335PC49 | N341PC49 | N353PC49 | N358PC49 | N359PC49 | N365PC49 | N409PC49 | N410PC49 | N416PC49 | N439PC49 | N440PC49 | N446PC49 | N451PC49 | N452PC49 | N458PC49 | N475PC49 | N476PC49 | N482PC49 | N499PC49 | N500PC49 | N506PC49 | N513PC49 | N514PC49 | N520PC49 | N533PC49 | N534PC49 | N540PC49 | N565PC49 | N566PC49 | N572PC49 | N598PC49 | N599PC49 | N605PC49

SKU IR10-600T49

4310 - Categorized Part
4310 - Compressors and Vacuum Pumps

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Federal Supply Class · 4310 - COMPRESSORS AND VACUUM PUMPS
Part & Reference Numbers (126)
Part NumberCAGEManufacturer StatusRNCCRNVCDACRNAACRNFCRNSCRNJCSADCHCCMSDS
3W11969 8FGX3 CURTISS-WRIGHT ELECTRO-MECHANICAL A 3 2 5 ZZ
3W11969 30760 INGERSOLL RAND CO A 5 9 6 AX 4 B
3W11969 0AT62 SIEMENS ENERGY, INC. A 3 9 6 AX
3W11969 88663 DRESSER-RAND CO INGERSOLL-RAND OPNS R 5 9 6 AX B
3W11969 88032 CURTISS-WRIGHT ELECTRO-MECHANICAL R 5 9 6 AX 4 B
3W11969 830Q4 CURTISS-WRIGHT ELECTRO-MECHANICAL A 5 9 5 ZZ B
F4469PC128 88032 CURTISS-WRIGHT ELECTRO-MECHANICAL R 5 9 6 AX 4 B
F4469PC128 30760 INGERSOLL RAND CO A 5 9 6 AX 4 B
F4469PC128 88663 DRESSER-RAND CO INGERSOLL-RAND OPNS R 5 9 6 AX B
F4688PC49 30760 INGERSOLL RAND CO A 5 9 6 AX 4 B
F4688PC49 88032 CURTISS-WRIGHT ELECTRO-MECHANICAL R 5 9 6 AX 4 B
F4688PC49 88663 DRESSER-RAND CO INGERSOLL-RAND OPNS R 5 9 6 AX B
F4689PC49 88663 DRESSER-RAND CO INGERSOLL-RAND OPNS R 5 9 6 AX B
F4689PC49 88032 CURTISS-WRIGHT ELECTRO-MECHANICAL R 5 9 6 AX 4 B
F4689PC49 30760 INGERSOLL RAND CO A 5 9 6 AX 4 B
H5658PC35 30760 INGERSOLL RAND CO A 5 9 6 AX 4 B
H5658PC35 88032 CURTISS-WRIGHT ELECTRO-MECHANICAL R 5 9 6 AX 4 B
H5658PC35 88663 DRESSER-RAND CO INGERSOLL-RAND OPNS R 5 9 6 AX B
H5983PC64 88663 DRESSER-RAND CO INGERSOLL-RAND OPNS R 5 9 6 AX B
H5983PC64 88032 CURTISS-WRIGHT ELECTRO-MECHANICAL R 5 9 6 AX 4 B
H5983PC64 30760 INGERSOLL RAND CO A 5 9 6 AX 4 B
IR10-600T49 30760 INGERSOLL RAND CO A 5 9 6 AX 4 B
IR10-600T49 88032 CURTISS-WRIGHT ELECTRO-MECHANICAL R 5 9 6 AX 4 B
IR10-600T49 88663 DRESSER-RAND CO INGERSOLL-RAND OPNS R 5 9 6 AX B
N334PC49 88663 DRESSER-RAND CO INGERSOLL-RAND OPNS R 5 9 6 AX B
N334PC49 88032 CURTISS-WRIGHT ELECTRO-MECHANICAL R 5 9 6 AX 4 B
N334PC49 30760 INGERSOLL RAND CO A 5 9 6 AX 4 B
N335PC49 30760 INGERSOLL RAND CO A 5 9 6 AX 4 B
N335PC49 88032 CURTISS-WRIGHT ELECTRO-MECHANICAL R 5 9 6 AX 4 B
N335PC49 88663 DRESSER-RAND CO INGERSOLL-RAND OPNS R 5 9 6 AX B
N341PC49 88663 DRESSER-RAND CO INGERSOLL-RAND OPNS R 5 9 6 AX B
N341PC49 88032 CURTISS-WRIGHT ELECTRO-MECHANICAL R 5 9 6 AX 4 B
N341PC49 30760 INGERSOLL RAND CO A 5 9 6 AX 4 B
N353PC49 30760 INGERSOLL RAND CO A 5 9 6 AX 4 B
N353PC49 88032 CURTISS-WRIGHT ELECTRO-MECHANICAL R 5 9 6 AX 4 B
N353PC49 88663 DRESSER-RAND CO INGERSOLL-RAND OPNS R 5 9 6 AX B
N358PC49 88663 DRESSER-RAND CO INGERSOLL-RAND OPNS R 5 9 6 AX B
N358PC49 88032 CURTISS-WRIGHT ELECTRO-MECHANICAL R 5 9 6 AX 4 B
N358PC49 30760 INGERSOLL RAND CO A 5 9 6 AX 4 B
N359PC49 30760 INGERSOLL RAND CO A 5 9 6 AX 4 B
N359PC49 88663 DRESSER-RAND CO INGERSOLL-RAND OPNS R 5 9 6 AX B
N359PC49 88032 CURTISS-WRIGHT ELECTRO-MECHANICAL R 5 9 6 AX 4 B
N365PC49 88663 DRESSER-RAND CO INGERSOLL-RAND OPNS R 5 9 6 AX B
N365PC49 88032 CURTISS-WRIGHT ELECTRO-MECHANICAL R 5 9 6 AX 4 B
N365PC49 30760 INGERSOLL RAND CO A 5 9 6 AX 4 B
N409PC49 30760 INGERSOLL RAND CO A 5 9 6 AX 4 B
N409PC49 88032 CURTISS-WRIGHT ELECTRO-MECHANICAL R 5 9 6 AX 4 B
N409PC49 88663 DRESSER-RAND CO INGERSOLL-RAND OPNS R 5 9 6 AX B
N410PC49 88663 DRESSER-RAND CO INGERSOLL-RAND OPNS R 5 9 6 AX B
N410PC49 88032 CURTISS-WRIGHT ELECTRO-MECHANICAL R 5 9 6 AX 4 B
N410PC49 30760 INGERSOLL RAND CO A 5 9 6 AX 4 B
N416PC49 30760 INGERSOLL RAND CO A 5 9 6 AX 4 B
N416PC49 88032 CURTISS-WRIGHT ELECTRO-MECHANICAL R 5 9 6 AX 4 B
N416PC49 88663 DRESSER-RAND CO INGERSOLL-RAND OPNS R 5 9 6 AX B
N439PC49 88663 DRESSER-RAND CO INGERSOLL-RAND OPNS R 5 9 6 AX B
N439PC49 88032 CURTISS-WRIGHT ELECTRO-MECHANICAL R 5 9 6 AX 4 B
N439PC49 30760 INGERSOLL RAND CO A 5 9 6 AX 4 B
N440PC49 30760 INGERSOLL RAND CO A 5 9 6 AX 4 B
N440PC49 88032 CURTISS-WRIGHT ELECTRO-MECHANICAL R 5 9 6 AX 4 B
N440PC49 88663 DRESSER-RAND CO INGERSOLL-RAND OPNS R 5 9 6 AX B
N446PC49 88663 DRESSER-RAND CO INGERSOLL-RAND OPNS R 5 9 A AX B
N446PC49 88032 CURTISS-WRIGHT ELECTRO-MECHANICAL R 5 9 6 AX 4 B
N446PC49 30760 INGERSOLL RAND CO A 5 9 A AX 4 B
N451PC49 30760 INGERSOLL RAND CO A 5 9 6 AX 4 B
N451PC49 88032 CURTISS-WRIGHT ELECTRO-MECHANICAL R 5 9 6 AX 4 B
N451PC49 88663 DRESSER-RAND CO INGERSOLL-RAND OPNS R 5 9 6 AX B
N452PC49 88663 DRESSER-RAND CO INGERSOLL-RAND OPNS R 5 9 6 AX B
N452PC49 88032 CURTISS-WRIGHT ELECTRO-MECHANICAL R 5 9 6 AX 4 B
N452PC49 30760 INGERSOLL RAND CO A 5 9 6 AX 4 B
N458PC49 30760 INGERSOLL RAND CO A 5 9 6 AX 4 B
N458PC49 88032 CURTISS-WRIGHT ELECTRO-MECHANICAL R 5 9 6 AX 4 B
N458PC49 88663 DRESSER-RAND CO INGERSOLL-RAND OPNS R 5 9 6 AX B
N475PC49 88663 DRESSER-RAND CO INGERSOLL-RAND OPNS R 5 9 6 AX B
N475PC49 88032 CURTISS-WRIGHT ELECTRO-MECHANICAL R 5 9 6 AX 4 B
N475PC49 30760 INGERSOLL RAND CO A 5 9 6 AX 4 B
N476PC49 30760 INGERSOLL RAND CO A 5 9 6 AX 4 B
N476PC49 88032 CURTISS-WRIGHT ELECTRO-MECHANICAL R 5 9 6 AX 4 B
N476PC49 88663 DRESSER-RAND CO INGERSOLL-RAND OPNS R 5 9 6 AX B
N482PC49 88663 DRESSER-RAND CO INGERSOLL-RAND OPNS R 5 9 6 AX B
N482PC49 88032 CURTISS-WRIGHT ELECTRO-MECHANICAL R 5 9 6 AX 4 B
N482PC49 30760 INGERSOLL RAND CO A 5 9 6 AX 4 B
N499PC49 30760 INGERSOLL RAND CO A 5 9 6 AX 4 B
N499PC49 88032 CURTISS-WRIGHT ELECTRO-MECHANICAL R 5 9 6 AX 4 B
N499PC49 88663 DRESSER-RAND CO INGERSOLL-RAND OPNS R 5 9 6 AX B
N500PC49 88663 DRESSER-RAND CO INGERSOLL-RAND OPNS R 5 9 6 AX B
N500PC49 88032 CURTISS-WRIGHT ELECTRO-MECHANICAL R 5 9 6 AX 4 B
N500PC49 30760 INGERSOLL RAND CO A 5 9 6 AX 4 B
N506PC49 30760 INGERSOLL RAND CO A 5 9 6 AX 4 B
N506PC49 88032 CURTISS-WRIGHT ELECTRO-MECHANICAL R 5 9 6 AX 4 B
N506PC49 88663 DRESSER-RAND CO INGERSOLL-RAND OPNS R 5 9 6 AX B
N513PC49 88663 DRESSER-RAND CO INGERSOLL-RAND OPNS R 5 9 6 AX B
N513PC49 88032 CURTISS-WRIGHT ELECTRO-MECHANICAL R 5 9 6 AX 4 B
N513PC49 30760 INGERSOLL RAND CO A 5 9 6 AX 4 B
N514PC49 30760 INGERSOLL RAND CO A 5 9 6 AX 4 B
N514PC49 88032 CURTISS-WRIGHT ELECTRO-MECHANICAL R 5 9 6 AX 4 B
N514PC49 88663 DRESSER-RAND CO INGERSOLL-RAND OPNS R 5 9 6 AX B
N520PC49 88663 DRESSER-RAND CO INGERSOLL-RAND OPNS R 5 9 6 AX B
N520PC49 88032 CURTISS-WRIGHT ELECTRO-MECHANICAL R 5 9 6 AX 4 B
N520PC49 30760 INGERSOLL RAND CO A 5 9 6 AX 4 B
N533PC49 88032 CURTISS-WRIGHT ELECTRO-MECHANICAL R 5 9 6 AX 4 B
N533PC49 30760 INGERSOLL RAND CO A 5 9 6 AX 4 B
N533PC49 88663 DRESSER-RAND CO INGERSOLL-RAND OPNS R 5 9 6 AX B
N534PC49 88663 DRESSER-RAND CO INGERSOLL-RAND OPNS R 5 9 6 AX B
N534PC49 88032 CURTISS-WRIGHT ELECTRO-MECHANICAL R 5 9 6 AX 4 B
N534PC49 30760 INGERSOLL RAND CO A 5 9 6 AX 4 B
N540PC49 30760 INGERSOLL RAND CO A 5 9 6 AX 4 B
N540PC49 88032 CURTISS-WRIGHT ELECTRO-MECHANICAL R 5 9 6 AX 4 B
N540PC49 88663 DRESSER-RAND CO INGERSOLL-RAND OPNS R 5 9 6 AX B
N565PC49 88663 DRESSER-RAND CO INGERSOLL-RAND OPNS R 5 9 6 AX B
N565PC49 88032 CURTISS-WRIGHT ELECTRO-MECHANICAL R 5 9 6 AX 4 B
N565PC49 30760 INGERSOLL RAND CO A 5 9 6 AX 4 B
N566PC49 30760 INGERSOLL RAND CO A 5 9 6 AX 4 B
N566PC49 88032 CURTISS-WRIGHT ELECTRO-MECHANICAL R 5 9 6 AX 4 B
N566PC49 88663 DRESSER-RAND CO INGERSOLL-RAND OPNS R 5 9 6 AX B
N572PC49 88663 DRESSER-RAND CO INGERSOLL-RAND OPNS R 5 9 6 AX B
N572PC49 88032 CURTISS-WRIGHT ELECTRO-MECHANICAL R 5 9 6 AX 4 B
N572PC49 30760 INGERSOLL RAND CO A 5 9 6 AX 4 B
N598PC49 30760 INGERSOLL RAND CO A 5 9 6 AX 4 B
N598PC49 88032 CURTISS-WRIGHT ELECTRO-MECHANICAL R 5 9 6 AX 4 B
N598PC49 88663 DRESSER-RAND CO INGERSOLL-RAND OPNS R 5 9 6 AX B
N599PC49 88663 DRESSER-RAND CO INGERSOLL-RAND OPNS R 5 9 6 AX B
N599PC49 88032 CURTISS-WRIGHT ELECTRO-MECHANICAL R 5 9 6 AX 4 B
N599PC49 30760 INGERSOLL RAND CO A 5 9 6 AX 4 B
N605PC49 30760 INGERSOLL RAND CO A 5 9 6 AX 4 B
N605PC49 88032 CURTISS-WRIGHT ELECTRO-MECHANICAL R 5 9 6 AX 4 B
N605PC49 88663 DRESSER-RAND CO INGERSOLL-RAND OPNS R 5 9 6 AX B
Item Characteristics (1)
MRCRequirementReply
TEXTGENERAL CHARACTERISTICS ITEM DESCRIPTIONSTEEL; 2.125 IN. OD; 2.062 IN. O/A LG; ONE END THD; 2.250-16 UN MALE THD; SQ WRENCHING FACILITY; 0.500-13 UNC-2B RH THD; 1.250 IN. ACROSS FLATS; 4 PLAIN HOLES 0.500 IN. DIA LOCATED 90 DEG APART
Management Data
MOESOSAACUIUI ConvMgmt CtrlUnit PriceQUPCIICSLCEffectiveC/H
DN SMS J EA 9B----- $235.76 1 U 0 01-OCT-2025 C
DS SMS J EA $235.76 1 U 0 01-OCT-2025 C
MOE Rules (6)
MOE RuleFormerAssignedAMCAMSCIMCIMCACollaboratorsReceivers
N9BC N9CD 01-APR-05 3 H Z GH GX HD
YA01 01-DEC-01 YA
ZH01 01-APR-91 ZH
ZP01 01-APR-91 ZP
ZU01 01-APR-91 ZU
ZW01 01-NOV-98 ZW
Freight / Transportation
NMFCSubWCCTCCDescription
121570X653ZGAGES AIR LIQUID LEVEL PRESSURE
Identification
Item Name Code (INC)77777
Primary INC (PINC)1248299
NIIN Assigned01-JAN-1963
Precious Metals Ind (PMIC)U
Criticality CodeX
DEMIL CodeA
Hazardous Material Ind (HMIC)N
Item Indicator (II)4
RPD MRC1
Shipping Weight & Cube
Shipping Weight0.25 lb
Shipping Cube0 cu ft
Standardization / Related NSNs (1)
Related NSNISCDecision Date
211-MAR-1972
Supersedes (Cancelled NSNs) (2)
Cancelled NSNEffective
4310-00-216-784201-JAN-1963
4310-00-459-084501-JAN-1963

If the NSN isn't available, are there substitutes or alternate part numbers for NSN 4310-00-494-4445?

NSN 4310-00-494-4445 is associated with the following manufacturer alternate part numbers: 3W11969, F4469PC128, F4688PC49, F4689PC49, H5658PC35, H5983PC64, IR10-600T49, N334PC49, N335PC49, N341PC49, N353PC49, N358PC49, N359PC49, N365PC49, N409PC49, N410PC49, N416PC49, N439PC49, N440PC49, N446PC49, N451PC49, N452PC49, N458PC49, N475PC49, N476PC49, N482PC49, N499PC49, N500PC49, N506PC49, N513PC49, N514PC49, N520PC49, N533PC49, N534PC49, N540PC49, N565PC49, N566PC49, N572PC49, N598PC49, N599PC49, N605PC49. Whether you need to buy, order, or get wholesale pricing on any of these part numbers, NSN-PARTS.COM accepts quote requests for pricing and availability, including obsolete and hard-to-find inventory.

Other 4310 - Compressors and Vacuum Pumps Products

FAQ

4310-00-494-4445

What National Stock Number (NSN) Category does this 4310-00-494-4445


NSN 4310-00-494-4445 belongs to Federal Supply Class 4310 which is 4310 - Compressors and Vacuum Pumps. This FSC is part of the federal supply catalog maintained by the U.S. Department of Defense and is used to standardize the procurement and cataloging of military and government components across all branches of the armed forces and federal agencies.

What traceability documentation is available for parts ordered through NSN-PARTS.COM?

Traceability is a core part of our sourcing process. Depending on the part and its supply chain origin, we can provide Certificates of Conformance (C of C), manufacturer packing slips, date codes, lot codes, and sourcing documentation that traces the item back through the distribution chain. For government and defense procurement, we understand that documentation requirements can be strict if your purchase order or contract specifies particular traceability requirements, include them in your RFQ and we will confirm our ability to meet them before order confirmation.

Does NSN 4310-00-494-4445 have an alternate part number?

Yes. NSN 4310-00-494-4445 is also referenced by manufacturer part number IR10600T49, where IR10600T49 is the original equipment manufacturer designation for this item. When sourcing this part, buyers may encounter either the NSN 4310-00-494-4445 or the MPN IR10600T49 depending on the procurement system or supplier being used. NSN-PARTS.COM accepts quote requests using either the NSN or the manufacturer part number. For a full list of alternate part numbers associated with this NSN, see below.

Which country originally cataloged this NSN, and what is its National Codification Bureau (NCB) code?

Every NSN includes a two-digit National Codification Bureau (NCB) code in positions 5 and 6 of the full 13-digit number. That code identifies which country originally cataloged the item through the NATO codification system. You can find the NCB code for this part listed in the product description above. Use the table below to identify the originating country and its NATO membership status.

For this NSN, the NCB code is 00, which means it was originally cataloged by USA (NATO). Use the table below for a full reference of all NCB codes and their associated countries.

Country NCB Code(s) Status
USA00 and 01NATO
Unassigned (USA)02 through 10n/a
West Germany / Germany11n/a
Belgium12NATO
France13NATO
Italy14NATO
Czechoslovakia / Czech Republic15NATO
Netherlands16NATO
South Africa17NATO
Brazil18Tier 1
Canada19Tier 2
Denmark20 and 21NATO
Greece22NATO
Iceland23NATO
Norway24NATO
Portugal25NATO
Turkey26NATO
Luxembourg27NATO
Argentina28Tier 2
Japan29Tier 1
Israel30Tier 2
Singapore31Tier 2
Spain32NATO
Malaysia33Tier 2
Thailand34Tier 1
Egypt35Tier 1
Republic of Korea36Tier 2
Estonia37NATO
Romania38NATO
Slovakia39NATO
Austria40Tier 2
Slovenia41NATO
Poland42NATO
United Nations-standard items43n/a
Indonesia44Tier 2
Philippines45Other
Lithuania46NATO
Fiji47Other
Tonga48Other
Bulgaria49NATO
Hungary50NATO
Chile51Tier 1
Croatia52NATO
North Macedonia53NATO
Latvia54NATO
Oman55Tier 1
Russian Federation56Other
Finland57NATO
Albania58NATO
Kuwait59Other
Ukraine60Tier 2
Belarus61Tier 2
Morocco62Tier 1
Sweden63NATO
Papua, New Guinea64Other
Australia65Tier 2
Afghanistan66Other
Georgia67Tier 1
Saudi Arabia69n/a
United Arab Emirates70Tier 1
India71Tier 2
Serbia72Tier 2
Pakistan73Other
Bosnia-Herzegovina74Tier 1
Brunei75Tier 1
Montenegro76NATO
Jordan77Tier 1
Peru78Tier 1
Colombia79Tier 2
Qatar80Tier 1
Algeria81Other
New Zealand82Tier 2
United Kingdom98 and 99NATO
What is your process for locating excess inventory for hard-to-find NSN parts?

When a part is not immediately available through standard distribution channels, our sourcing team conducts a multi-channel search that includes authorized distributor networks, government surplus and DLA excess inventory, independent broker networks, and manufacturer direct channels where applicable. Every potential source is evaluated for authenticity and traceability before we present it as a viable option. We do not source from unvetted or unknown suppliers, and we will never offer parts we cannot document. If we locate stock, we provide full sourcing details with your quote so your procurement and quality teams can make an informed decision before committing to an order.

Are parts sourced through NSN-PARTS.COM traceable back to the original manufacturer?

We make every effort to ensure full chain-of-custody traceability for every part we supply. Our preferred sourcing path is always manufacturer-direct or through authorized distribution channels, which provides the strongest traceability and the lowest counterfeit risk. When parts must be sourced through independent or excess channels; as is often the case for obsolete or long-discontinued components, we require sourcing documentation at every link in the chain and apply additional scrutiny to confirm authenticity. Parts that cannot be adequately documented are not offered for sale. If your program has specific traceability requirements such as QPL, QML, or QSLD compliance, please include those details in your RFQ so we can confirm sourcing eligibility upfront.

Testimonials

Sent an RFQ on a Friday afternoon and had a quote back within the hour. Parts showed up ahead of schedule. That kind of response time matters a lot when equipment is down.

Lead Tech, Part 145 Repair Station

We work on older military equipment and finding parts is a constant battle. NSN-Parts has come through for us more times than I can count. Good people, fast turnaround.

Diane R., Defense Contractor – Procurement

I had three distributors tell me a part was gone for good. NSN-Parts had it in stock and shipped it the same day. They're my first call now

Logistics Specialist, USAF

The FSC search actually works. I found what I needed without digging through a bunch of irrelevant results. Ordering was simple and the parts were exactly what was listed.

Priya M., Supply Chain Analyst

I've been sourcing NSN parts for a long time and it's hard to find a distributor that really knows the catalog. These guys do. They answer questions fast and know what they're talking about.

Robert H., Aviation Parts Buyer

Accreditations

Accreditations