Eddie-Bolt 2
Howmet/Huck · Lockbolt / pin-collar
Composite-grade lockbolt with a positive flute-lock and great fatigue life.
aka Eddie Bolt 2 · EddieBolt · flute-lock pin
Schematic cross-section, not to scale. Orange = the swaged collar (needs both-side access).
Shear
90–95 ksi
Blind bulb
n/a
Max service
≤ 900°F
Lead-time risk
Medium
Diameters
5/32, 3/16, 1/4, 5/16, 3/8"
Head styles
- Protruding
- 100° flush
Standards
- NAS (Eddie-Bolt series)
Materials & galvanic compatibility vs CFRP
| Alloy | Shear | vs CFRP | Notes |
|---|---|---|---|
| Titanium (Ti-6Al-4V) | 95 ksi | low | 6Al-4V pin |
| A286 CRES | 95 ksi | med | — |
Install tooling & training
- Tool
- Delta-Rad driver (three-lobe)
- Special / proprietary
- Special tooling · proprietary
- Training
- Aerospace specialty; clamp-load control critical.
- Inspection
- Lobes deformed into flutes; preload verification.
Pin flutes plus automatic nut-lobe deformation form a positive mechanical lock at controlled torque — no FOD from a broken pintail.
Sourcing
Lead-time risk: Medium
- Boeing Distribution (Aviall / KLX) ↗
Formed from Aviall + KLX; broadest catalog coverage for OEM/MRO/airline; deep stock on commodity NAS/MS hardware.
- Peerless Aerospace Fastener ↗
Largest dedicated aerospace fastener inventory; approved source for major OEMs + DoD; multi-year fixed pricing, bonded storage, designated hold-shelf, min/max + safety-stock programs.
- Incora ↗
Authorized distributor for 60+ manufacturers; AS9100 / EN9120 / FAA AC 00-56; strong vendor-managed-inventory (VMI) and kitting programs.
Need a price or lead time?
Build a spec-complete RFQ and send it to distributors who stock Eddie-Bolt 2.
Strengths
- +Positive flute-lock (beats friction-lock collars)
- +Designed for aerospace composites
- +Low profile for tight access
Trade-offs
- −Needs both-side access (not blind)
- −Proprietary Delta-Rad tooling
- −Costlier than Hi-Lok
Typical applications
- · Composite primary structure
- · High-vibration, fatigue-critical joints
- · Limited-access assemblies (lower profile than Hi-Lok)