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Drop-In (DIA) Internally Threaded Anchor

Drop-In (DIA)

Drop-In anchors are internally threaded drop-in expansion anchors for use in flush-mount applications in solid base materials. Available in stainless steel (DIA), short (DIAS) or coil-thread (DIAC) versions. Minimum thread engagement should be equal to the nominal diameter of the threaded insert.

Key Features

  • Lipped edge (DIAS) eliminates need for precisely drilled hole depth
  • Available in coil-thread version for 1/2" and 3/4" coil-threaded rod
  • Short length (DIAS) enables shallow embedment to help avoid drilling into rebar or pre-stressed/post-tensioned cables
  • Short Drop-In anchors include a setting tool compatible with the anchor to ensure consistent installation

Material

Carbon and stainless steel

Finish

Carbon steel; zinc-plated

Installation

  1. Drill a hole in the base material using the appropriate diameter carbide drill bit as specified in the table. Drill the hole to the specified embedment depth plus 1/8" for flush mounting. Blow the hole clean using compressed air. Overhead installations need not be blown clean.
  2. Insert designated anchor into hole. Tap with hammer until flush against surface.
  3. Using the designated drop-in setting tool, drive expander plug toward the bottom of the anchor until shoulder of setting tool makes contact with the top of the anchor.
  4. Minimum thread engagement should be equal to the nominal diameter of the threaded insert.

Caution

  • The load tables list values based upon results from the most recent testing and may not reflect those in current code reports. Where code jurisdictions apply, consult the current reports for applicable load values.
  • Oversized holes will make it difficult to set the anchor and will reduce the anchor's load capacity.

Technical Information

Drop-In (DIA) Design Information

Codes

Drop-In:

  • Factory Mutual 3017082
  • Underwriters Laboratories File Ex3605
  • Meets requirements of Federal Specifications A-A-55614, Type I.

Short Drop-In:

  • Factory Mutual 3017082 & Underwriters Laboratories File Ex3605.

Related Links

Related Literature

Product Information Tables

Drop-In Anchor Product Data – Stainless Steel
Rod Size (in.) Type 303/304 Stainless Model No. Type 316 Stainless Model No. Drill Bit Dia. (in.) Bolt Threads (per in.) Body Length (in.) Thread Length (in.) Quantity
Box Carton
1/4 DIA25SS DIA256SS 3/8 20 1 3/8 100 500
3/8 DIA37SS DIA376SS 1/2 16 1 9/16 5/8 50 250
1/2 DIA50SS DIA506SS 5/8 13 2 3/4 50 200
5/8 DIA62SS 7/8 11 2 1/2 1 25 100
3/4 DIA75SS 1 10 3 1/8 1 1/4 20 80
Short Drop-In Anchor Product Data
Rod Size (in.) Model No. Drill Bit Diameter (in.) Bolt Threads (per in.) Body Length (in.) Thread Length (in.) Quantity
Box Carton
3/8 DIA37S1 1/2 16 3/4 1/4 100 500
1/2 DIA50S1 5/8 13 1 5/16 50 200
  1. A dedicated setting tool is included with each box of DIA37S and DIA50S.
Coil-Thread Drop-In Anchor Product Data
Rod Size (in.) Carbon Steel Model No. Drill Bit Diameter (in.) Bolt Threads (per in.) Body Length (in.) Thread Length (in.) Quantity
Box Carton
1/2 DIA50C1 5/8 6 2 3/4 50 200
3/4 DIA75C1 1 5 3 1/8 1 1/4 20 80
  1. DIA50C and DIA75C accept 1/2" and 3/4" coil-thread rod, respectively.
Material Specifications
Anchor Component Component Material
Zinc Plated Carbon Steel Type 303/304 Stainless Steel Type 316 Stainless Steel
Anchor Body Meets minimum 70,000 psi tensile AISI 303. Meets chemical requirements of ASTM A582 Type 316
Expander Plug Meets minimum 50,000 psi tensile AISI 303 Type 316
Thread UNC/Coil-thread UNC UNC
Note: DIA37S, DIA50C and DIA75C are not available in stainless steel.