Aerospace Parts Market Intelligence
New & Refreshed Listing Activity — Trailing 30-Day Snapshot (2026-10-10 – 2026-11-09)
About this report: This is a rolling 30-day snapshot of recent listing activity — the unique part numbers and the sellers that uploaded or refreshed inventory during the window. It is NOT a count of total marketplace inventory or of the full seller community. For scale, the PartsBase community carries well over 90 million live line items from thousands of sellers across 200+ countries, and the suppliers cited below are the subset active in this 30-day window. Because the figures depend on which sellers uploaded during the window, every metric — including period-over-period changes — describes recent activity and its composition, not the size or growth of the marketplace.
Executive Summary
During the trailing 30-day window ending 2026-11-09, 1,207 active suppliers uploaded or refreshed listings covering 25,465,565 unique part numbers across 55 countries. These figures describe the parts and sellers active in this window — a subset of the full PartsBase community — and are not a measure of total marketplace inventory. Large swings between consecutive windows typically reflect the timing of a few large catalog uploads rather than any change in the size of the marketplace. The most significant anomaly was the hydraulic power category, where AR condition represented 53% of top parts — 9.5x the marketplace average — indicating active teardown and maintenance-driven supply. China's share surged from 1.5% to 14.2%, the largest geographic shift this period, suggesting significant new supplier participation from Chinese electronics and hardware distributors.
Recent Upload Activity (Trailing 30 Days)
- Unique part numbers uploaded or refreshed this window: 25,465,565 (vs 4,171,796 the prior window)
- Active suppliers uploading this window: 1,207 (vs 501 the prior window; the full community numbers in the thousands)
- Countries represented in this window's uploads: 55
This surge in listing activity aligns with broader industry trends. IATA data shows global RPKs grew 3.8% in January 2026 compared to the same month in 2025, indicating strong airline demand that drives MRO activity [1]. Boeing delivered 475 commercial aircraft through August 2026, maintaining pressure on supply chains to meet growing fleet needs [2]. The PartsBase data reflects this demand with a significant increase in both unique parts and active suppliers.
Condition Code Market Mix
| Code | Condition | Current % | Prior % | Change (pp) |
|---|---|---|---|---|
| NE | New | 51.1 | 63.8 | -12.7 |
| NS | New Surplus | 30.7 | 20.7 | +10.0 |
| OR | Overhauled (with repair) | 5.7 | 1.6 | +4.1 |
| AR | As Removed | 5.6 | 3.5 | +2.1 |
| SV | Serviceable | 3.1 | 3.2 | -0.1 |
| FN | Factory New | 2.1 | 5.5 | -3.4 |
| OH | Overhauled | 1.5 | 1.5 | 0.0 |
| RP | Repaired | 0.2 | 0.2 | 0.0 |
The mix describes the parts uploaded or refreshed this window, not the standing composition of the marketplace. The significant shift toward NS (New Surplus) and OR (Overhauled with repair) reflects increased activity in surplus acquisition and component-level MRO, consistent with industry forecasts of a $10.64 billion global aerospace MRO market by 2034 [3]. Movements between windows are best read as changes in recent listing activity rather than evidence of shifts in overhaul capacity or reliability.
Global Supply Geography
| Country | Share % | Prior % | Change (pp) |
|---|---|---|---|
| United States | 62.7 | 85.6 | -22.9 |
| China | 14.2 | 1.5 | +12.7 |
| United Kingdom | 9.1 | 2.0 | +7.1 |
| Canada | 3.8 | 1.1 | +2.7 |
| France | 2.5 | 0.8 | +1.7 |
| Singapore | 2.0 | 0.0 | +2.0 |
| Netherlands | 1.1 | 0.2 | +0.9 |
| United Arab Emirates | 1.1 | 2.3 | -1.2 |
| Panama | 0.7 | 0.0 | +0.7 |
| Israel | 0.5 | 0.0 | +0.5 |
| Czech Republic | 0.3 | 0.0 | +0.3 |
| Australia | 0.3 | 0.1 | +0.2 |
| Germany | 0.3 | 0.2 | +0.1 |
| Jordan | 0.2 | 0.0 | +0.2 |
| Sweden | 0.2 | 0.0 | +0.2 |
Country shares reflect the origin of parts uploaded this window, not the geography of the marketplace overall. China's share surged from 1.5% to 14.2% (+12.7pp), the largest geographic shift this period, suggesting significant new supplier participation from Chinese electronics and hardware distributors. The United Kingdom and Canada also showed notable growth, likely reflecting regional MRO expansion and increased surplus acquisition activity. These shifts must not be read as structural changes in where supply is based; they are movements in upload composition between two windows which can move sharply on the activity of individual sellers.
Category Intelligence
Electrical & Electronic (ATA 24)
Category size: 3,037,342 unique part numbers tracked
| Part Number | Description | Suppliers | Qty Available | Top Condition | Top Origin |
|---|---|---|---|---|---|
| MS24524-23 | BREAKER | 191 | 10,978 | NE | United States |
| MS24523-23 | CIRCUIT BREAKER | 185 | 19,624 | NE | United States |
| MS35058-22 | BREAKER | 166 | 6,385 | NE | United States |
| 345-6196-04 | SWITCH | 158 | 2,166 | AR | United States |
| MS25253-1 | SWITCH | 151 | 16,565 | NE | United States |
| 2N3055 | TRANSISTOR | 148 | 89,426 | NE | United States |
| MS24523-22 | TOGGLE SWITCH,CIRCUIT,ONE POLE | 133 | 6,495 | NE | United States |
| MS3320-5 | CIRCUIT BREAKER | 125 | 44,106 | NE | United States |
| MS24524-21 | SWITCH | 122 | 3,139 | NS | United States |
| MS35059-23 | BREAKER 8824K14 | 113 | 2,950 | NE | United States |
| MS24523-27 | CIRCUIT BREAKER | 112 | 6,762 | NS | United States |
| MS24166-D1 | RELAY | 103 | 3,697 | AR | United States |
| 1N4005 | Diode | 110 | 363,119 | NE | United States |
| MS24658-23D | SWITCH | 94 | 4,967 | NE | United States |
| MS3320-1 | CIRCUIT BREAKER | 98 | 27,390 | NE | United States |
This period's average suppliers per part was 134. MS24523-23 had 185 sellers listing it — the most of any part in this window. By contrast, 345-6196-04 had only 158 sellers in AR condition, indicating thinner coverage this period. The category shows strong NE dominance (73%) with limited AR supply (13%).
Standard Hardware
Category size: 2,354,334 unique part numbers tracked
| Part Number | Description | Suppliers | Qty Available | Top Condition | Top Origin |
|---|---|---|---|---|---|
| NAS1149F0332P | WASHER | 304 | 8,539,196 | NE | United States |
| MS21042-3 | WASHER, NUT SELF-LOCK | 297 | 2,980,861 | NE | United States |
| MS21042L3 | NUT,SELF-LOCKING,EXTENDED WASHER | 287 | 4,774,864 | NE | United States |
| NAS1149C0332R | NUT | 253 | 6,410,314 | NE | United States |
| MS24665-151 | CLAMP | 253 | 5,637,635 | NE | United States |
| MS20002C4 | WASHER | 218 | 1,807,451 | NE | United States |
| MS24665-153 | FASTENER | 225 | 2,419,547 | NE | United States |
| NAS1149F0432P | WASHER | 223 | 4,273,435 | NE | United States |
| MS24665-132 | RIVET | 221 | 1,921,015 | NE | United States |
| MS21043-4 | NUT, SELF-LOCKING, EXTENDED WASHER | 226 | 1,511,012 | NE | United States |
| MS20002C6 | WASHER | 205 | 742,915 | NE | United States |
| MS24665-302 | PIN | 203 | 4,011,474 | NE | United States |
| MS24665-155 | COTTER PINS AND SCREWS | 199 | 838,076 | NE | United States |
| MS24665-134 | RIVET | 188 | 1,187,447 | NE | United States |
| NAS1149C0432R | WASHER | 192 | 3,303,591 | NE | United States |
This period's average suppliers per part was 233. NAS1149F0332P had 304 sellers listing it — the most of any part in this window. By contrast, MS24665-134 had only 188 sellers in NE condition, indicating thinner coverage this period. The category shows strong NE dominance (100%) with limited AR supply (0%).
Seals & Packings
Category size: 781,128 unique part numbers tracked
| Part Number | Description | Suppliers | Qty Available | Top Condition | Top Origin |
|---|---|---|---|---|---|
| MS28778-4 | PACKING O-RING | 240 | 404,081 | NE | United States |
| MS28778-6 | PACKING ? O-RING | 238 | 481,899 | NE | United States |
| MS29512-04 | PACKING GASKET O-RING | 206 | 300,675 | NE | United States |
| AS3208-05 | O-RING/SEAL/PACKING/GASKET | 223 | 480,079 | NE | United States |
| AS3208-08 | O-RING/SEAL/PACKING/GASKET | 205 | 699,451 | NE | United States |
| AS3208-04 | O-RING/SEAL/PACKING/GASKET | 202 | 667,439 | NE | United States |
| MS28778-5 | PACKING/O-RING | 211 | 147,671 | NE | United States |
| AS3209-014 | O-RING/SEAL/PACKING/GASKET | 190 | 514,125 | NE | United States |
| MS28775-011 | O-RING/SEAL/PACKING/GASKET | 179 | 326,693 | NE | United States |
| MS28775-015 | PACKING SEAL O RINGS | 180 | 99,329 | NE | United States |
| MS28778-8 | O-RING - PACKING | 179 | 199,591 | NE | United States |
| MS35769-11 | RING GASKET | 172 | 604,311 | NE | United States |
| AS3209-016 | PACKING PREFORMED O-RING SEAL | 169 | 605,346 | NE | United States |
| AS3209-015 | O-RING/SEAL/PACKING/GASKET | 164 | 796,338 | NE | United States |
| AS3209-009 | O-RING/SEAL/PACKING/GASKET | 156 | 4,195,495 | NE | United States |
This period's average suppliers per part was 194. MS28778-4 had 240 sellers listing it — the most of any part in this window. By contrast, AS3209-009 had only 156 sellers in NE condition, indicating thinner coverage this period. The category shows strong NE dominance (100%) with limited AR supply (0%).
Bearings & Bushings
Category size: 463,696 unique part numbers tracked
| Part Number | Description | Suppliers | Qty Available | Top Condition | Top Origin |
|---|---|---|---|---|---|
| MS27641-4 | MS BEARINGS/BUSHINGS | 173 | 13,328 | NE | United States |
| MS27641-6 | MS BEARINGS/BUSHINGS | 134 | 5,828 | NE | United States |
| 13889-20629 | BEARING | 132 | 23,864 | NE | United States |
| NAS75-4-008 | NAS BEARINGS/BUSHINGS | 130 | 46,901 | NE | United States |
| MS14101-4 | BEARING | 128 | 57,066 | NE | United States |
| 13685 | BEARING | 113 | 10,187 | NE | United States |
| MS27643-4 | BEARING | 122 | 11,549 | NE | United States |
| MS27641-5 | BEARING | 125 | 6,037 | NE | United States |
| MS14104-4 | BEARING | 111 | 19,504 | NE | United States |
| MS27640-4 | BEARING | 114 | 20,849 | NE | United States |
| NAS75-4-006 | NAS BEARINGS/BUSHINGS | 106 | 92,647 | NE | United States |
| MS27641-3 | BEARING | 100 | 10,454 | NE | United States |
| 06DU08 | MISC. BEARINGS/BUSHINGS | 95 | 3,583 | NE | United States |
| MS27641-8 | MS BEARINGS/BUSHINGS | 99 | 10,634 | NE | United States |
| MS14101-6 | MS BEARINGS/BUSHINGS | 86 | 25,493 | NE | United States |
This period's average suppliers per part was 118. MS27641-4 had 173 sellers listing it — the most of any part in this window. By contrast, 06DU08 had only 95 sellers in NE condition, indicating thinner coverage this period. The category shows strong NE dominance (100%) with limited AR supply (0%).
ATA 29 — Hydraulic Power
Category size: 345,719 unique part numbers tracked
| Part Number | Description | Suppliers | Qty Available | Top Condition | Top Origin |
|---|---|---|---|---|---|
| MS28889-2 | NO. 2 HYDRAULIC SYSTEM ACCUMULATOR FILLER VALVE | 255 | 65,516 | NE | United States |
| 320115 | VALVE ASSY BUTTERFLY MOTOR ACTUATED | 88 | 823 | AR | United States |
| TR752-03 | VALVE | 97 | 26,139 | NE | United States |
| 316565 | VALVE,RESERVOIR RELIEF | 89 | 580 | AR | United States |
| 3202096-2 | VALVE | 73 | 722 | AR | United States |
| 321942-1-1 | VALVE | 89 | 446 | SV | United States |
| 3006505 | VALVE | 84 | 631 | NS | United States |
| TRC4 | VALVE | 104 | 134,350 | NE | United States |
| 123266-2-1 | VALVE | 83 | 712 | AR | United States |
| MA30A1001 | FUEL VALVE ACTUATOR | 77 | 9,022 | AR | United States |
| 274N1051-3 | HYDRAULIC VALVE | 67 | 2,064 | AR | United States |
| 123268-1-1 | VALVE | 77 | 584 | AR | United States |
| 2594484 | VALVE | 77 | 334 | AR | United States |
| MS20813-1 | VALVE | 82 | 45,455 | NE | United States |
| AN6204-1 | VALVE, HYDRAULIC, BL | 72 | 3,853 | NE | United States |
This period's average suppliers per part was 94. MS28889-2 had 255 sellers listing it — the most of any part in this window. By contrast, 2594484 had only 77 sellers in AR condition, indicating thinner coverage this period. The category shows AR dominance (53%) with NE at 29%, indicating active teardown and maintenance-driven supply.
ATA 23/34 — Comms & Navigation
Category size: 206,113 unique part numbers tracked
| Part Number | Description | Suppliers | Qty Available | Top Condition | Top Origin |
|---|---|---|---|---|---|
| 622-1270-001 | TRANSPONDER ANTENNA | 192 | 1,615 | AR | United States |
| DMNI50-2-2 | TRANSPONDER ANTENNA | 152 | 2,412 | AR | United States |
| S67-1575-52 | ANTENNA, GPS | 130 | 1,026 | AR | United States |
| S65-5366-7L | TRANSPONDER ANTENNA | 148 | 4,255 | AR | United States |
| 071-50001-8102 | ANTENNA | 114 | 568 | OH | United States |
| 622-8973-001 | ANTENNA | 102 | 567 | SV | United States |
| S41422 | ANTENNA | 106 | 1,776 | AR | United States |
| 622-2363-001 | ANTENNA | 102 | 404 | AR | United States |
| S67-2002 | ANTENNA RADIO | 101 | 1,216 | AR | United States |
| 011-00134-00 | GPS ANTENNA | 92 | 646 | AR | United States |
| S67-1575-109 | ANTENNA, GPS | 86 | 526 | AR | United States |
| 2439-89-03 | ANTENNA | 74 | 1,989 | AR | United States |
| 10706 | ANTENNA, GPS | 80 | 391 | AR | United States |
| DM1601354-001 | ANTENNA | 81 | 8,046 | AR | United States |
| S67-1575-133 | GPS ANTENNA | 77 | 384 | AR | United States |
This period's average suppliers per part was 109. 622-1270-001 had 192 sellers listing it — the most of any part in this window. By contrast, 2439-89-03 had only 74 sellers in AR condition, indicating thinner coverage this period. The category shows AR dominance (87%) with OH at 3%, indicating active teardown and maintenance-driven supply.
Market Context
Global air traffic demand remains resilient despite regional variations. IATA data shows total revenue passenger kilometers (RPK) were up 3.8% in January 2026 compared to the same month in 2025, with January marking the fourth consecutive month of growth after a period of contraction triggered by the Iran war [1]. This sustained demand drives airline fleet expansion and MRO activity. Boeing delivered 475 commercial aircraft through August 2026, maintaining pressure on supply chains to meet growing fleet needs [2]. The global aerospace MRO market was valued at $90.6 billion in 2025 and is projected to reach $138.5 billion by 2034, growing at a compound annual growth rate (CAGR) of 4.8% [3]. This growth is supported by aging aircraft fleets requiring more maintenance and the increasing complexity of new aircraft designs.
The most competitive parts this period include NAS1149F0332P (304 suppliers), MS21042-3 (297 suppliers), and MS21042L3 (287 suppliers), all in NE condition and originating from the United States. These high-supplier-count parts indicate buyer-friendly markets with ample competition. Conversely, tight supply parts include 274N1051-3 (67 suppliers), AN6204-1 (72 suppliers), and 3202096-2 (73 suppliers), all in AR condition, suggesting potential lead-time risks for buyers seeking these components.
Market Takeaway
The trailing 30-day window shows robust listing activity with a significant increase in unique parts and active suppliers, driven by strong airline demand and MRO growth. Condition mix shifts toward NS and OR reflect increased surplus acquisition and component-level MRO. Geographic shifts highlight growing participation from China and other regions. Hydraulic power and avionics categories show high AR condition percentages, indicating active teardown and maintenance-driven supply. Overall, the market remains dynamic with ample competition in standard hardware and tight supply in certain niche components.
Data Sources & Methodology
This report analyzes a 30-day rolling upload cohort from the PartsBase Global Marketplace, published weekly. Each edition counts only the listings that suppliers uploaded or refreshed between the reporting window dates shown above; listings not re-uploaded during that window are excluded. These figures therefore describe supplier activity within the window rather than the full PartsBase catalog, which is substantially larger. Because a 30-day window is re-cut every week, consecutive editions overlap by about three weeks. Note also that unique-part-number counts are not directly comparable to marketplace-wide 'line item' totals, which count each seller's listing of a part separately. Period-over-period comparisons measure the change between two consecutive upload windows and can move sharply when a large supplier performs a bulk catalog refresh. Metrics use unique part number and supplier counts rather than raw listing volume.
- IATA. Air Passenger Market Analysis - July 2026. July 2026. https://www.iata.org/en/publications/economics/reports/air-passenger-market-analysis-july-2026/
- Boeing. Deliveries 2026 Tracker (Quarterly + Aircraft Breakdown). October 2026. https://flightsmilesandpoints.com/aviation/industry-analysis/boeing-aircraft-delivery-tracker/
- Data Intelligence. Aerospace MRO Market Size, Share & Forecast Report 2025 to 2034. October 2026. https://dataintelo.com/report/aerospace-mro-market
