Titanium Bolt Nut Washer Set GR5 (Ti-6Al-4V) Stock

Product Overview

Reviewed and maintained by the Engineering Team, Shaanxi Qianyi Tuoda Technology Co., Ltd.

GR5 Titanium Bolt Nut Washer Set Stock | Ti-6Al-4V (R56400), M6-M36 Kits, ASTM F468, MTC 3.1

Meta Description: GR5 (Ti-6Al-4V / R56400 / TC4) titanium bolt+nut+washer sets from confirmed heats — M6-M36, metric/UNC/UNF, hex/socket/countersunk, flat+spring washer kitted per assembly. ASTM B348 bar / F468 finished route, EN 10204 3.1, anti-galling note included.

GR5 Identity (write all on the bag tag)

• GB: TC4 | ASTM: Grade 5 / Ti-6Al-4V
• UNS: R56400 | DIN/W.-Nr.: 3.7165
• Bar form: ASTM B348 Gr5 | Finished fastener: ASTM F468 (bolts/studs), F467 (nuts)
• Chemistry: Ti bal., Al 5.5-6.75%, V 3.5-4.5%, Fe≤0.40%, O≤0.20%, H≤0.015%
• Annealed min: Rm≥895 MPa, Rp0.2≥828 MPa, El≥10%, density 4.43 g/cm³

Certificate must say R56400 / Ti-6Al-4V / Gr5 — "TC4" alone is not enough for export audit.

What's in the Set (kitted, not loose mix)

• 1× hex/socket/countersunk bolt (rolled thread preferred)
• 1× hex/lock nut (matched thread pitch)
• 1× flat washer (DIN125/ISO7089/B18.22.1)
• 1× spring washer (DIN127) or serrated lock washer on request
• Bagged per assembly: "M12×40 / Gr5 / heat No. / thread standard" on label

Custom kit ratio (e.g. 1 bolt + 2 nuts + 2 washers for double-clamp) — state in RFQ.

Stock Logic (honest)

• Confirmed-heat Gr5 bar in house; CNC thread + anneal + clean
• Common sizes M6/M8/M10/M12/M16/M20/M24 rotate; window quoted after heat confirm
• Not "infinite shelf of every combo" — kitted from confirmed lot, no fake "100k pcs all sizes same-day"
• MOQ friendly: 100 pcs/size for stock thread; kit bags from 50 sets

Size & Thread Coverage

M10 and 3/8" look close — pitch differs (1.5mm vs 16 TPI). Thread standard MUST be on PO.

Anti-Galling — Stated Up Front (not buried)

• Titanium-on-titanium threads gall without care — use clean threads + approved anti-seize (MoS₂/PTFE/dry film), never assemble dry
• Matched nut/bolt from same heat lot reduces galling variance
• Rolled threads (not cut) keep grain flow → better fatigue + less galling
• Torque from validated preload, not steel tables; re-check after 24h on PTFE-lubed joints
• Galvanic: insulate from CS/SS with PTFE sleeve if joint sees electrolyte

QC Before Pack

1. Heat No. on bar cert → carried to bag label
2. PMI/XRF grade verify (R56400)
3. GO/NO-GO thread gauge (ISO 6H nut / 6g bolt, or UNC/UNF per PO)
4. 100% visual + burr check, pickled/clean, no iron pickup (ferroxyl if required)
5. EN 10204 3.1: chemistry + tensile from bar heat, QA-signed
6. 3.2 (SGS/BV/TÜV) PO-fronted

Where GR5 Kits Go

• Marine/seawater clamps, desalination skids, offshore cable trays
• Chemical plant covers, exchanger bonnet clamps, insulator sets
• Aerospace MRO, UAV/airframe non-critical joints (drawing-approved)
• Motorsport/NEV chassis, battery tray, caliper bolts
• Medical/pharma equipment housings (non-implant)

RFQ Template (copy-paste)

Kit: bolt + nut + flat washer + spring washer ___
Size: M___ × length ___mm  (or 3/8"-16 × __")
Thread: metric coarse / fine / UNC / UNF ___
Head: hex / socket / countersunk ___
Grade confirm: Gr5 = R56400 / Ti-6Al-4V ___
Qty (sets): ___
Surface: pickled / polished / anodized (colour ___) / dry-film lube ___
Anti-gall requirement: MoS2 / PTFE / none ___
Cert: 3.1 / 3.2 (TPI ___)
Incoterm: EXW Baoji / FOB Shanghai / DAP ___

FAQ — GR5 Titanium Bolt Nut Washer Set

Q1: Gr5 or Gr2 for fasteners?
A: Gr5 when strength/weight matters (aerospace, chassis, high-P clamps); Gr2 when max corrosion + lower cost, lower load. Pick by preload, not looks.

Q2: Why does thread standard matter so much?
A: M10×1.5 ≠ 3/8"-16. Wrong pitch = cross-thread on site. PO must name metric/UNC/UNF.

Q3: Will titanium bolts seize?
A: Only if assembled dry or mismatched. Clean threads + approved lube + matched lot = no galling. Stated in every pack.

Q4: Annealed or STA?
A: Annealed default (ductility + galling resistance). STA on PO only, with heat-treat record.

Q5: Can nut be Gr2 with Gr5 bolt?
A: Possible but not recommended for high-preload — galling/galvanic + hardness mismatch. Match Gr5/Gr5 or use approved insert.

Q6: MTC on a 100-set bag?
A: Heat-linked 3.1 per lot; bag label carries heat No. Speed never downgrades cert.

Q7: Anodize colour?
A: Yes (blue/gold/purple) for ID coding — cosmetic only, not a corrosion upgrade. State colour.

Q8: 3.2 possible?
A: TPI at PO stage; cannot be back-built from 3.1 after shipment.

Q9: HF / dry chlorine service?
A: Titanium excluded in those media. Red line, no workaround.

Q10: HS code?
A: WCO 6-digit 8108.90 base for Ti articles; fastener sub-heading via broker. Process stated on CI.

Request a Quote

Email: sales@[yourdomain].com

Send size + thread standard + set ratio + qty. Reply in 24h: heat status, EXW/FOB price, cert scope, dispatch window.

About: Baoji Titanium Valley GR5 fastener kit line — Ti-6Al-4V / R56400 / TC4, ASTM B348 bar + F468/F467 finished route, M6-M36 kitted bolt+nut+washer sets, rolled threads, PMI + GO/NO-GO gauge, EN 10204 3.1. Anti-galling instruction in every pack. No dry assembly, no mis-pitched kits, no cert downgrade, no "TC4-only" label without R56400 line. Lot confirmed before PI; bag tag = MTC = heat.