Specifications
Surface Treatments
Certifications
- ISO 9001 - 2015 Certified
- PED 2014/68/EC
- NACE MR0175/ISO 15156-2
- NORSOK M-650
- DFAR
- MERKBLATT AD 2000 W2/W7/W10
A286 Solid Rivets
A286 Fasteners being an austenitic
age-hardenable iron based super alloy stainless steel that is melted as AOD + ESR, AOD
+ VAR, or VIM + VAR is manufactured at TorqBolt. Cres-A286 fasteners have excellent
strength even at high temperatures up to 1500 Degrees Fahrenheit. Alloy A286 Stainless
Fasteners has excellent creep resistance making it excellent for critical high
temperature applications such as jet engine components. A286
Fastener Strength conforming to the ASTM
A453 Grade 660 Class D specification (with a guaranteed yield strength minimum
of 105,000 PSI), but with stress rupture tests carried out to also conform to ASTM
A453 Grade 660 Class A. These provide a tensile strength of 895 MPa (minimum),
0.2% offset yield strength of 725 MPa (minimum), elongation of 15% and reduction of
area of 18%. Hardness is in the range 29-35 HRC.
In general, we also supply ASTM A453 GR 660 heat-treated and tested to conform to grade
B. This provides a tensile strength of 895 MPa (minimum), a lower 0.2 offset yield
strength of 585 MPa (minimum), elongation of 15% and reduction of area of 18%. Hardness
is in the range 24-37 HRC.
About A286 Solid Rivets
TorqBolt manufactures Alloy A286 (UNS S66286) solid rivets, universal head, brazier head, flat-head, countersunk and tubular rivets, to NAS, MS and MIL-SPEC standards in 1/16" to 1/2" / M2 to M12 sizes. A286 rivets are heat-treated to AMS 5732 / AMS 5737 condition, providing the high-temperature shear strength, non-magnetic behaviour and corrosion resistance required for aircraft fuselage, jet-engine cowling, exhaust skin panels and high-temperature structural assemblies.
A286 Solid Rivet Head Shapes & Aerospace Standards
Alloy A286 (UNS S66286) solid rivets are produced by cold-heading from AMS 5732 / AMS 5737 wire and aged after manufacture. The shop end is heated to bright cherry red (> 870 °C) and bucked while hot, or cold-driven for diameters ≤ 4.8 mm.
- Universal head, NASM20470 / MS20470, the workhorse aerospace solid rivet for fuselage skin attachment.
- Brazier head, flatter than universal, shallower dome.
- Flat (mushroom), large flat head; used on internal structural assemblies.
- Countersunk 100°, NASM20426 / MS20426, the aerospace flush rivet for outer-skin riveting.
- Countersunk 120°, legacy aerospace, deeper countersink for thicker skin.
- Tubular (semi-tubular) rivet, partial bore from shop end; heads-by-rolling.
- Set / blind rivet, A286 versions of the Cherrymax / CherryLOCK family.
A286 Rivet Diameters, Hole Tolerance & Squeeze Force
Standard A286 solid rivet diameters: 1/16" (1.6 mm), 3/32" (2.4 mm), 1/8" (3.2 mm), 5/32" (4.0 mm), 3/16" (4.8 mm), 7/32" (5.6 mm), 1/4" (6.4 mm), 5/16" (8.0 mm), 3/8" (9.5 mm) and 1/2" (12.7 mm). Metric M2 to M12. Hole-to-rivet clearance per AS3239 / NASM5674: 0.005" max class A, 0.010" max class B.
A286 Rivet vs Aluminium & Stainless Alternatives
- vs 2117-T4 aluminium (AD rivet): A286 retains 100 % of room-temperature shear at 540 °C; AD rivet anneals above 175 °C.
- vs Monel (M rivet): A286 is harder; Monel preferred for marine non-thermal service, A286 for hot-section.
- vs Inconel 718 rivets: Inconel 718 retains strength to 750 °C but costs 3 × A286 and is harder to drive cold.
- vs CRES-410 stainless: A286 is non-magnetic; required near flight instruments, MRI, magnetic-sensitive electronics.
A286 Rivet Application Areas
- Jet-engine cowling, exhaust nozzle skin panels, augmentor fuel-spray ring attachment.
- Gas-turbine combustor liner and transition-piece structural rivets.
- Rocket-motor case-skin and aerodynamic-shroud structural rivets.
- High-temperature aircraft fuselage skin (Mach > 1.5, supersonic transport).
Alloy A286 Solid Rivets , Specification Overview
A286 solid rivets are the dominant high-temperature aerospace fastener for Mach > 1.5 fuselage skin, jet-engine cowling and exhaust-skin panels. They retain 100 % of room-temperature shear at 540 °C and 70 % at 700 °C; ordinary 2117-T4 aluminium AD rivets anneal above 175 °C, eliminating their use anywhere skin friction or exhaust heat reaches the panel.
The non-magnetic property is the second-most cited reason for A286 rivet selection. Wherever a riveted assembly sits near flight instrumentation, MRI machinery, electron microscopes or magnetic-field-sensitive electronics, A286 replaces ferritic CRES-410. The combination of high-temperature strength + non-magnetic + corrosion resistance is unique to the precipitation-hardenable iron-nickel-chromium superalloy family.
A286 Solid Rivets Governing Standards & Specifications
TorqBolt manufactures every a286 solid rivets to the applicable industry standard. The matrix below lists the principal specifications, material, dimensional, inspection , that a286 solid rivets are released against. EN 10204 type 3.1 mill certificates ship with every order; type 3.2 third-party-witnessed inspection is available for nuclear, offshore and customer-mandated source-surveillance contracts.
| Authority | Specification | Coverage |
|---|---|---|
| ASTM | A453 grade 660 / F468 | High-temperature rivet material |
| AMS | 5732 / 5737 / 5853 | Bar (sol-treated, aged) / wire / welding rod |
| NASM | 20470 / 20426 / 20613 | Universal head / 100° CS / brazier head solid rivet |
| MS | 20470 / 20426 / 20612 | Aerospace solid rivet dimensions |
| MIL-R | 5674 / 7885 | Aerospace rivet inspection / installation |
| AS | 5674 / 3239 | Hole tolerance class A/B; 12-point dimensional |
| BS | EN 6101 | Solid aerospace rivets |
| ISO | 1051 | Solid rivet head shapes |
| EN | 10204 3.1 / 3.2 | Mill / third-party cert |
| AS9100D / EN 9100 | AQMS / FAI per AS9102 | Aerospace quality + first-article-inspection |
A286 Solid Rivets Sizes & Available Patterns
TorqBolt manufactures A286 solid rivets by cold-heading from AMS 5732 / 5737 wire, ageing to develop full strength. The shop end is heated to bright cherry-red (> 870 °C) and bucked while hot for diameters > 4.8 mm; cold-driven for smaller sizes.
| Head Shape | Standard | Metric range | Inch range | Driving |
|---|---|---|---|---|
| Universal head | NASM 20470 / MS 20470 | M2, M12 | 1/16" , 1/2" | Hot or cold |
| Brazier head | NASM 20613 / MS 20613 | M2, M8 | 1/16" , 5/16" | Hot or cold |
| Countersunk 100° | NASM 20426 / MS 20426 | M2, M10 | 1/16" , 3/8" | Cold |
| Countersunk 120° | Legacy aerospace | M3, M10 | 1/8" , 3/8" | Cold |
| Flat (mushroom) | DIN 660 / ISO 1051 | M2, M12 | 1/16" , 1/2" | Hot or cold |
| Tubular (semi-tubular) | DIN 7338 / ISO 15983 | M2, M6 | 1/16" , 1/4" | Cold (head rolling) |
A286 Solid Rivets Manufacturing Process
Every a286 solid rivets TorqBolt ships traces back to a vacuum-induction-melted plus vacuum-arc-remelted (VIM-VAR) ingot meeting AMS 5731 / 5732 chemistry. The complete manufacturing route is:
- Melt: VIM-VAR ingot to AMS 5732 / 5737 chemistry.
- Wire drawing: hot-rolled rod cold-drawn through carbide dies to rivet wire diameter (1.6 mm to 12.7 mm).
- Cold-heading: head profile upset on a 2-die / 3-blow header from cut wire blank.
- Trimming & sizing: shank length trimmed to drawing; head pre-formed to NASM tolerances.
- Solution treatment: 980 °C, oil-quench. Vacuum atmosphere for aerospace lots.
- Precipitation aging: 720 °C / 16 h, air-cool. Hardness 277-302 HBW.
- Surface finish: pickled to remove furnace oxide; passivated per ASTM A967; corrosion-protective oil dip.
- Inspection: dimensional check head and shank, hardness, head-mark verification, NDT (LPI) on aerospace lots, FAI per AS9102 on new-part numbers.
- Packaging: sorted by diameter and length; lot-marked card; corrosion-inhibited wrap.
Lot traceability is maintained from VIM-VAR heat number through finished-part inspection. Customer-witness sampling, NDT (LPI / UT / RT), and radiographic certification are available on contracts that invoke AS9100D, NORSOK M-650 QTR or nuclear ASME III subsection NB.
Aerospace Rivet Release Protocol
Rivet inspection is dominated by aerospace AS9100D requirements. Every lot moves through a tightened release sequence designed to certify the rivet for in-flight service:
- FAI per AS9102 on every new part number, no exceptions.
- 100 % visual inspection at 10× magnification for surface defects, head-mark depth, shank concentricity.
- Sample shear-test per MIL-R-5674 , measured shear must exceed minimum specified for diameter and head shape.
- Penetrant inspection (LPI per ASTM E1417) on the entire lot for aerospace orders.
- Hardness traverse on every heat verifying aging uniformity.
- Magnetic permeability check on every coil, must read < 1.005 µᵣ for non-magnetic-required service.
- Salt-spray after passivation when MIL-STD-1312 is invoked.
- Drive-test on a sample , rivet must form an ASTM-conforming shop head at design squeeze force without splitting.
Most aerospace rivet orders invoke EN 10204 type 3.2 with third-party witness, plus AS9100D first-article reporting.
A286 Solid Rivet Applications by Industry
Aerospace skin and structure
Jet-engine cowling, exhaust nozzle skin panels, augmentor fuel-spray ring attachment, supersonic-transport fuselage skin (Mach > 1.5), thrust-reverser cascade structure.
Industrial gas turbine combustor liners
Combustor inner-liner shingle attachment, transition-piece structural rivets, secondary-air-flow seal-strip retention. 540-700 °C continuous service, hundreds of thousands of thermal cycles.
Rocket motor and missile structures
Solid-rocket-motor case-skin riveting, missile aerodynamic-shroud structure, nozzle-extension attachment.
High-temperature heat shields and exhaust systems
Industrial heat-shield panel rivets on furnace doors, glass-melt-tank covers, exhaust-manifold heat-shield retention on automotive and turbocharger applications.
Non-magnetic electronics and laboratory
MRI-compatible non-magnetic rivets for medical / scientific apparatus; mass-spectrometer housing; electron-microscope chamber assembly.
A286 Solid Rivets vs Alternative Materials
Rivet material is driven by service temperature and squeeze-force economics. AD aluminium is the cheapest baseline but caps at 175 °C; Monel works to 480 °C; A286 owns the 540-700 °C envelope; Inconel 718 takes over only when temperature exceeds 700 °C and cost permits.
| Property | A286 rivet | 2117-T4 AD | Monel 400 | Inconel 718 |
|---|---|---|---|---|
| Service ceiling | 700 °C | 175 °C | 480 °C | 700 °C |
| RT shear | 540 MPa | 180 MPa | 380 MPa | 730 MPa |
| Magnetic | No | No | No | No |
| Cold-driveable | ≤ 4.8 mm | All sizes | ≤ 6.4 mm | Hot only |
| Cost index | 1.0× | 0.1× | 0.6× | 3.0× |
A286 is the sweet-spot fastener material when service temperature exceeds 315 °C (the 17-7 PH ceiling) but the application can’t justify a 3× cost jump to Inconel 718. Roughly 70 % of all jet-engine and industrial-gas-turbine bolting falls in this 540-700 °C envelope, which is why A286 is the highest-volume aerospace superalloy fastener material in the world.
How to Specify an A286 Solid Rivet
- Material spec: AMS 5732 (sol-treated and aged bar) or AMS 5737 (precision aerospace bar).
- Head shape: universal / brazier / 100° CS / 120° CS / flat / tubular.
- Dimensional standard: NASM 20470 / NASM 20426 / NASM 20613 / DIN 660 / ISO 1051.
- Diameter & length: diameter (1/16" to 1/2" / M2 to M12) and length, e.g. “3/16" × 0.625"”.
- Hole class: AS 3239 / NASM 5674 class A (0.005" max clearance) or class B (0.010" max).
- Surface finish: passivated per ASTM A967; corrosion-protective oil for storage.
- Inspection certificate: EN 10204 3.1 default; 3.2 + AS9102 FAI for aerospace.
Example: “Solid rivet, AMS 5732, NASM 20470 universal head, 3/16" × 0.500", hole class A per NASM 5674, head-marked ‘A286’ + lot, EN 10204 3.1 + AS9102 FAI.”
Why TorqBolt for A286 Solid Rivets
Aerospace rivet supply is dominated by quality-system maturity, not unit price. Our rivet line ships under a strict AS9100D process flow:
- FAI on every new drawing: AS9102 first-article inspection report ships with the first lot of any new part number or revision.
- NASM / MS catalog: NASM 20470 (universal head), NASM 20426 (countersunk), MS 20613 (brazier head) in metric and inch series.
- Heat-treatment verified by traverse: aging-cycle verification on every batch via 4-position hardness sampling.
30-plus years of fastener manufacture; AS9100D + ISO 9001:2015 + PED + NORSOK certifications; non-magnetic verification (µᵣ < 1.005) on every coil; lot-marked card with corrosion-inhibited wrap.
A286 Rivet Order Profile
Rivet orders cluster around three customer types. Aircraft skin and structural OEMs order NASM 20470 universal-head and NASM 20426 countersunk in 3/16" and 1/4". Gas-turbine combustor manufacturers order brazier-head 1/8" and 5/32" for liner-shingle attachment. Heat-shield manufacturers (automotive turbocharger and industrial furnace) order universal-head 1/8" and 5/32" in M2-M5. Lot sizes range from 500 pieces (single-build aerospace) to 100,000 pieces (heat-shield production runs).
Manufacturing note from the rivet line: we hold A286 rivet wire in the solution-treated condition (no aging) until the customer order is firm, then age in a small batch dedicated to that order. This avoids the "rivet age-creep" problem where stocked-aged rivets harden slightly in ambient warehouse conditions over 12-18 months. Our customer rejection rate on shop-driven rivets is 0.02 %; the industry average is around 0.3 %.
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