Huck Magna-Grip
Howmet/Huck · Lockbolt / pin-collar
Wide-grip lockbolt — one pin covers grip ranges that normally need four.
aka MagnaGrip · wide-grip lockbolt
Schematic cross-section, not to scale. Orange = the swaged collar (needs both-side access).
Shear
60–80 ksi
Blind bulb
n/a
Max service
≤ 450°F
Lead-time risk
Medium
Diameters
3/16, 1/4, 5/16, 3/8"
Head styles
- Protruding
- 100° flush
Standards
- Huck Magna-Grip series
Materials & galvanic compatibility vs CFRP
| Alloy | Shear | vs CFRP | Notes |
|---|---|---|---|
| Alloy steel | 75 ksi | med | carbon steel, zinc |
| Aluminum | 60 ksi | high | 7075-T6 |
Install tooling & training
- Tool
- Huck pin + collar swage tool
- Special / proprietary
- Special tooling · proprietary
- Training
- Standard lockbolt procedure.
- Inspection
- Swage-lock form; collar break; preload gauge.
Two-piece swage-lock; a flexible pin break accommodates a wide grip range, so one pin replaces several conventional fasteners.
Sourcing
Lead-time risk: Medium
- 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.
- Boeing Distribution (Aviall / KLX) ↗
Formed from Aviall + KLX; broadest catalog coverage for OEM/MRO/airline; deep stock on commodity NAS/MS hardware.
Need a price or lead time?
Build a spec-complete RFQ and send it to distributors who stock Huck Magna-Grip.
Strengths
- +Exceptionally wide grip range — fewer part numbers
- +Consistent controlled clamp
- +Swage-lock vibration resistance
Trade-offs
- −Needs both-side access
- −Proprietary tooling
- −Not composite-optimized
Typical applications
- · Wide-grip structural joints (one pin spans many grips)
- · Weight-critical assembly (aluminum variant)
- · Fatigue-critical, high-clamp joints