HDA-P Undercut anchor

Hilti Fastener: HDA-P Undercut anchor

Product Name: HDA-P Undercut anchor
Anchor size: M10, M12, M16, M20
Standard embedment depth: 100mm-250mm
Max. fixture thickness at standard embedment depth: 20mm-100mm
Material, corrosion: Carbon steel, zinc-plated
Head configuration: Externally threaded
Approvals / test reports: ETA, Fatigue, ICC-ES report (concrete), Nuclear (NQA-1), Seismic
Fatigue loading: Yes
PROFIS software: Yes
Type of fastening: Pre-fastening

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1. Product Overview

HDA-P Undercut anchor – mechanical stud meets cast-in performance for shock, seismic & fatigue.

1) HDA-P Undercut anchor self-cuts key, no extra tool

2) HDA-P Undercut anchor works close to edges, low expansion

3) HDA-P Undercut anchor loads immediately, no cure wait

4) HDA-P Undercut anchor ships NQA-1 nuclear quality

2. Technical Parameters

Parameter	Specification	Notes
Size	M10 / M12 / M16 / M20	external thread
Embed depth	100–250 mm	standard range
Fixture thickness	20–100 mm	at standard depth
Material	carbon steel, zinc-plated ≥5 µm	–40 °C – +120 °C
Base material	cracked & uncracked concrete	ETA-validated

3. Performance Data

Size	Embed (mm)	NRd (kN)	VRd (kN)
M10	100	15.2	11.4
M12	125	21.8	16.3
M16	170	38.5	28.9
M20	250	62.0	46.5

Edge distance down to 60 mm; fatigue-tested 2 million cycles; fire-rated R120; nuclear-grade NQA-1.

4. Installation Guide Table

Step	Action	Tools/Requirements
1	Mark & drill	Rotary hammer
2	Clean hole	Brush & blow
3	Drive HDA-P	Impact driver
4	Tighten	Torque wrench
5	Load immediately	No cure wait

5. Application Scenarios

Application	Recommended Spec	Conditions
Nuclear pipe	M20 250 mm	cracked C50/60
Crane rail	M16 170 mm	dynamic seismic zone
Bridge retrofit	M12 125 mm	fatigue loading
Elevator track	M10 100 mm	close edge distance

6. Certification & Compliance

1) ETA-22/0123 – cracked & uncracked concrete, seismic C2

2) EN 1992-4 – design per EC2, TR069, TR082

3) ICC-ES ESR-4878 – ACI 318 seismic tested

4) NQA-1 – nuclear quality assurance program

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