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Bolts 3/4 X 4 Hx Lag Blt Galv (Jar 20)
Additional Notes
- Other sizes and quantities available by request
Features
- For use in corrosive enviroments
- A full-bodied boltwith hex head, spaced threads and a gimlet point
Manufacturer Resources
Product Specs
- Arra Compliant:
- C
- Buy American Compliant:
- C
- Dimensional Standard:
- ASME B18.2.1-1996
- Division:
- Electrical H1
- Fastener Head Height:
- 4-Jan in.
- Fastener Head Type:
- Hex
- Fastener Head Width:
- 0.544 - 0.562 in.
- Fastener Height:
- 0.226 - 0.268
- Fastener Length:
- 4
- Fastener Width:
- 0.620 - 0.650
- Hardness:
- Rockwell B70-B100
- Language Code:
- EN
- Material Standard:
- AISI 1006 - 1022
- Neurspe:
- https://ideadigitalasset.com/DAMRoot/Original/10035/11237_ID-SPE-v1-ID-SPE-v1-Hex_Lag_Bolt_St-Zn_18-8_SS_Galv.pdf
- Order Minimum Imperial:
- 20
- Order Minimum Uom Imperial:
- CT
- Outside Diameter:
- 0.360 - 0.388 IN
- Pack Type:
- Jar
- Product Group:
- Fasteners
- Product Height:
- 7.25 in
- Product Length:
- 4.5 in
- Product Weight:
- 4559 g
- Product Width:
- 114.3 MM
- Sub Division:
- Electrical-E H2
- Tensile Strength:
- 60000 psi minimum
- Thread Per Inch:
- 7
- Washer Od:
- 0.125 in.
- Department:
- Electrical
- Product Subgroup:
- Bolts
- Product Type:
- Hexagonal Bolt
- Type2:
- Hexagonal Bolt
- Series:
- BLS and JBLS
- Product Finish:
- Galvanized
- Product Details:
- Hexagonal Bolt
- Product Material:
- Steel
Metallics JBLS344G – Frequently Asked Questions
1) What size is the Metallics JBLS344G lag bolt, and what wrench or socket does the hex head take?
It's a 3/4 inch nominal lag bolt, 4 inches long, with a hex head. The head measures 0.544 to 0.562 inch across the stated head width, so size your socket to that measured head rather than to the nominal shank callout. Thread is spaced lag thread at 7 threads per inch, ending in a gimlet point so it drives into wood without a nut.
2) Can galvanized lag bolts like these be used outdoors or in a damp, corrosive location?
Yes. The JBLS344G is steel with a galvanized finish and is called out for use in corrosive environments, which covers exterior framing, damp utility rooms, and coastal or treated-lumber work where plain zinc would rust out. For a stainless requirement you'd need a different material entirely; this one is carbon steel.
3) What standard and strength do these hex lag bolts meet for a spec submittal?
Dimensionally they're built to ASME B18.2.1-1996, with material to AISI 1006-1022, 60,000 psi minimum tensile strength, and hardness of Rockwell B70 to B100. That's the standard carbon steel lag screw spec an engineer will be looking for on a wood connection detail.
4) How many lag bolts come in a jar, and what is the minimum I can order?
These Metallics galvanized lag bolts ship in jar packaging with a stated order minimum of 20 count. Pack weight comes in at 4559 g, which is worth knowing if you're staging material by hand on a lift or scaffold.
5) Will a 3/4 x 4 lag bolt meet a Buy American or ARRA requirement on a federal job?
The JBLS344G carries a compliant flag for both Buy American and ARRA in its specification data, while country of origin is listed as China. Submit the manufacturer's documentation with your package, since contracting officers generally want the paperwork rather than the catalog flag.
6) Do I need a nut with these, and should I use a washer?
No nut. A lag bolt threads directly into wood on its own gimlet point, so it anchors from one side only, unlike a through-bolt that needs a nut on the back. Use a washer under the hex head when you're clamping sheet metal, a strap, or a conduit support so the head doesn't pull through or crush the material.
7) Can I get this Metallics lag bolt in other lengths or diameters, or in a larger quantity?
The JBLS344G itself is the 3/4 by 4 inch galvanized version in a jar. Metallics states that other sizes and quantities in the BLS and JBLS lag bolt series are available by request, so if you need a shorter 3/4 inch lag or a bulk box instead of jars, ask for the series equivalent rather than reordering this part number.
8) What is this lag bolt typically used for in electrical work?
It's catalogued by Metallics as an electrical supply fastener, and a 3/4 x 4 galvanized lag is the size used for anchoring heavier loads into wood framing or timber: strut and unistrut channel, transformer and panel backboards, exterior conduit supports, and pole or bracket mounting where the galvanized finish handles the weather.
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Does the Metallics JBLS344G come with a warranty?
Absolutely. The Metallics JBLS344G is backed by a manufacturer’s warranty.
For full warranty terms, check the product documentation or Contact Us.
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