This page is an educational + spec-directory resource. Always verify exact requirements against OEM drawings, MIL specifications, and manufacturer datasheets before procurement.
Lacing cords (also called lacing tapes, twines, or harness lacing) are used to bundle and secure wire harnesses in aerospace, defense, space, rail, and industrial electronics.
They create a clean, lightweight, non-abrasive harness that performs reliably under heat, vibration, and long-term service.
This is the main category for all aerospace-approved lacing tapes and cords.
What Lacing Cords Are
A lacing cord is a braided or twisted textile used to tie, bind, or lace wire bundles. Unlike plastic cable ties:
- No sharp edges
- No creep under heat
- No melting drips during fault conditions
- Minimal added weight
- Flexible and non-damaging to insulation
Aerospace users continue to prefer lacing cords for safety, reliability, and compliance.
(Described in the aerospace lacing overview)
Materials Available in This Category
Aerospace lacing cords are defined by material. LacingCords.com lists the following families:
Nomex® (Meta-Aramid)
High-temperature, flame-resistant, self-extinguishing.
Used where heat, flame, and electrical performance are required.
PTFE (Teflon®)
Excellent chemical resistance, non-flammable, very low outgassing.
Common for spacecraft, missiles, and cleanroom harnesses.
Fiberglass / PTFE-Glass
For extreme temperature zones and mission-critical applications.
Incombustible; stable to very high thermal exposure.
Polyester
Strong, low moisture absorption, higher temperature tolerance than nylon.
Used across aviation and industry.
Nylon (Type I–III & MIL-DTL-713 Twisted Cord)
General-purpose aerospace lacing.
Good knot holding; available waxed or unwaxed.
Specifications Covered
Lacing cords are governed by several aerospace standards.
This category includes products aligned with:
- MIL-T-43435 (Types I–V, legacy spec)
- A-A-52080 (nylon), A-A-52081 (polyester), A-A-52082 (PTFE), A-A-52083 (fiberglass), A-A-52084 (Nomex)
- MIL-DTL-713 (twisted nylon cord, Type P)
- NASA-STD-8739.4 (installation workmanship standard)
Full compliance requires checking the size, material type, finish, and tensile class on the manufacturer datasheet.
Finishes & Coatings
Finishes improve knot security, flame behaviour, or surface stability.
Common documented finishes include:
- A — none
- B — wax
- C — elastomer
- E — vinyl
- F — silicone resin
- G — liquid nylon
See individual material pages for details.
(Source: Western Filament finishes table)
How Lacing Cords Are Used
Workmanship patterns include:
- Spot ties (periodic knots)
- Continuous spiral lacing
- Double-cord lacing (large bundles)
These follow NASA-STD-8739.4 workmanship rules for aerospace harnessing.
Product Subcategories in Lacing Cords
Select from the material-specific categories:
- Nomex Lacing Tape
- PTFE Lacing Tape
- Fiberglass / PTFE-Glass Lacing Tape
- Polyester Lacing Tape
- Nylon (Flat Tape)
- MIL-DTL-713 Twisted Nylon Cord (Round)
- Waxed Telecom Cord
- Specialty / OEM-Specific Cords
Each subcategory provides:
- Sizes and widths
- Minimum break strengths (manufacturer-specific)
- Finish options
- Application notes
- Datasheet links
Verification Before Use
Always verify:
- Material type (I–V or P)
- Size / width
- Tensile class
- Finish
- OEM program requirements
Incorrect substitution can cause non-conformance, rework, or failed inspection.
CTA
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