Datasheet

ManualsBrandsLoctite ManualsChemicalsScrew-Locking Compound, Medium Strength 19 g

Technical Data Sheet

LOCTITE

248™

January-2009

PRODUCT DESCRIPTION

LOCTITE

248™ provides the following product

characteristics:

Technology Acrylic

Chemical Type Dimethacrylate ester

Appearance (uncured) Blue, wax consistency

LMS

Appearance (form) Stick

Fluorescence Positive under UV light

LMS

Components One component - requires no mixing

Cure Anaerobic

Application Threadlocking

Strength Medium

LOCTITE

248™ is a medium strength anaerobic

threadlocking material. It is supplied as a wax-like semi-solid,

conveniently packaged in a self-feeding stick applicator. As

with liquid anaerobic products, this material develops its cured

properties in the absence of air when confined between close

fitting metal surfaces. It achieves consistent strength and can

be used on a variety of metal substrates. It is particularly well

suited for applications where a liquid product may be too fluid

to stay on a part or be difficult to apply. It stores easily and

allows for direct contact to a threaded part during application to

ensure even coverage.

TYPICAL PROPERTIES OF UNCURED MATERIAL

Specific Gravity @ °C 1.1

Melting Point, °C >80

Unworked Penetration, ISO 2137, 1/10 mm 90 to 140

LMS

Lubricity, K-Factor:

3/8 x 16 zinc phosphate & oil nuts and bolts:

22.2 kN tension, control (no product) 0.2

22.2 kN tension, with product 0.19

26.7 kN tension, control (no product) 0.2

26.7 kN tension, with product 0.19

(In critical applications, it is necessary to determine the

K values independently. Henkel corporation makes no

warranty of specific performance on any individual

fastener)

TYPICAL CURING PERFORMANCE

Cure Speed vs. Substrate

The rate of cure will depend on the substrate used. The graph

below shows the breakloose strength developed with time on

3/8 x 16 degreased steel nuts & bolts compared to different

materials and tested according to ISO 10964. All samples

pre-torqued to 5 N·m. Product applied to bolts only.

% of Full Strength on Steel

Cure Time

125

100

5min 10min 30min 1h 3h 6h 24h

Steel

Zinc dichromate

Zinc phosphate & oil

Stainless steel

Cure Speed vs. Temperature

The rate of cure will depend on the temperature. The graph

below shows the breakloose strength developed with time at

different temperatures on 3/8 x 16 degreased steel nuts & bolts

and tested according to ISO 10964. All samples pre-torqued to

5 N·m. Product applied to bolts only.

% of Full Strength on Steel

Cure Time

125

100

5min 10min 30min 1h 3h 6h 24h

40 °C

22 °C

5 °C

Summary of content (3 pages)

PAGE 1
Technical Data Sheet LOCTITE® 248™ January-2009 TYPICAL PROPERTIES OF UNCURED MATERIAL Specific Gravity @ °C Melting Point, °C Unworked Penetration, ISO 2137, 1/10 mm Lubricity, K-Factor: 3/8 x 16 zinc phosphate & oil nuts and bolts: 22.2 kN tension, control (no product) 22.2 kN tension, with product 26.7 kN tension, control (no product) 26.7 kN tension, with product 1.1 >80 90 to 140LMS 0.2 0.19 0.2 0.19 (In critical applications, it is necessary to determine the K values independently.
PAGE 2
TDS LOCTITE® 248™, January-2009 125 100 Heat Aging Aged at temperature indicated and tested @ 22 °C % Initial Strength @ 22 °C % of Full Strength on Steel Cure Speed vs. Activator Where cure speed is unacceptably long due to large gaps, applying activator to the surface may improve cure speed. However, this can reduce ultimate strength of the bond and therefore testing is recommended to confirm effect.
PAGE 3
TDS LOCTITE® 248™, January-2009 Directions for use: For Assembly 1. For best results, clean all surfaces (external and internal) with a LOCTITE® cleaning solvent and allow to dry. 2. Advance only enough product to use at the time of application. 3. Remove any skin that may have formed on the top of the stick. 4. Apply sufficient product to fill the threads in the area where the nut will be engaged on the bolt. 5. Recap product after use. 6. Assemble and tighten as required. For Disassembly 1.