Send a part number, a photo, or a whole BOM — we supply it and stand behind it. Worldwide shipping to 80+ countries.

AMPCO Box End Wrench: Natural, 3 1/8 in Head Size, 24 1/2 in Overall Lg, Std - SAE, Single End, 12-Point, Nonsparking Box End Wrenches
AMPCOSAE, Single End, 12-Point, Nonsparking Box End Wrenches

AMPCO Box End Wrench: Natural, 3 1/8 in Head Size, 24 1/2 in Overall Lg, Std

The AMPCO Box End Wrench is a nonsparking, single-end, 12-point SAE box end wrench in a Natural finish. It features a 3 1/8 in head size, 24 1/2 in overall length, standard length, and a 0° head offset angle (MPN 4678).

SKU 3G-OTH-275108

Brand
AMPCO
Item
Box End Wrench: Natural, 3 1/8 in Head Size, 24 1/2 in Overall Lg, Std
Category
SAE, Single End, 12-Point, Nonsparking Box End Wrenches
Available to Order
Trade pricing by quote — replies within 24h
Qty
WhatsApp an engineerMessage via Telegram
No account needed — your quote request goes straight to our engineers. A free account lets you track quotes and re-order faster.
Worldwide Shipping
Air & sea freight
Datasheet on Request
Technical specs
1-Day Quote
Replies within 24h

Local availability & support — Singapore

Local office
20 Woodlands Link #09-05, Singapore 738733
Phone
+65 8878 8355
Delivery
Same-day or next-business-day delivery within Singapore for in-stock items; 7–14 days for factory-order parts from Europe.
Payment
Invoicing in SGD. PayNow, bank transfer, and corporate PO accepted.
Ships to
Singapore

Technical Specifications

AMPCO
Manufacturer Part Number
4678
Type
Std
Overall Lg
24 1/2 in
Head Size
3 1/8 in
Head Offset Angle

Technical Documents

No technical documents available for this product.
Request documentation
Not sure this is the right part? Get a recommendation.

Need installation or engineering help?

Installation, commissioning, maintenance plans, system design, and bundled product + service quotes — one team handles the full scope.
Talk to an engineer

Ask a question

AMPCO Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The AMPCO Box End Wrench is a nonsparking, single-end, 12-point SAE box end wrench in a Natural finish. It features a 3 1/8 in head size, 24 1/2 in overall length, standard length, and a 0° head offset angle (MPN 4678).

Frequently Asked Questions

What is the AMPCO Box End Wrench used for?

The AMPCO Box End Wrench is used in hazardous environments where sparking tools could ignite flammable gases or dust. Its nonsparking design makes it suitable for oil refineries, chemical plants, and mining operations. The 12-point box end provides secure grip on hex fasteners, and the 0° offset allows straight-on access in tight spaces.

What are the specifications of the AMPCO Box End Wrench?

The AMPCO Box End Wrench (MPN 4678) is a single-end, 12-point SAE wrench with a 3 1/8 in head size and 24 1/2 in overall length. It has a standard length, 0° head offset angle, and a Natural finish. The nonsparking material is ideal for explosive atmospheres. AMPCO is the OEM brand.

Where to buy the AMPCO Box End Wrench worldwide?

You can source the AMPCO Box End Wrench worldwide through 3G Electric, a global industrial equipment distributor. We handle full logistics, customs clearance, and delivery to your site. Contact us for availability and lead time. 3G Electric supplies genuine AMPCO tools to customers across industries.

How to select the right AMPCO Box End Wrench?

Select the AMPCO Box End Wrench based on fastener size and access constraints. For a 3 1/8 in hex nut, this 12-point wrench provides full engagement. The 24 1/2 in length offers leverage for high-torque applications. Ensure the 0° offset matches your workspace. Always verify the nonsparking rating for your hazardous area classification.

Used in

Common applications for AMPCO
Oil and gas refinery maintenance — AMPCO combination wrench model 1512 for tightening flanges in classified areas
Chemical processing plant — AMPCO box-end wrench model 4422 for valve adjustment in volatile atmospheres
Grain handling facility — AMPCO open-end wrench model WO-22X23 for equipment repair in dust-hazard zones
Pharmaceutical manufacturing — AMPCO slotted screwdriver model S-39 for accessing control panels in cleanrooms
Mining operations — AMPCO impact socket model I-1D1-7/16 (4-PT) for heavy equipment maintenance underground
Aerospace fuel handling — AMPCO nut driver model ND-15MM for assembly of fuel system components

AMPCO Products

3G Electric supplies AMPCO sae, single end, 12-point, nonsparking box end wrenches. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

You might also need

Burners & Combustion Pumps & Compressors Spare Parts All Products

Compatible alternatives & equivalents

Cross-referenced by specification & description
AMPCO Box End Wrench: Natural, 2 15/16 in Head Size, 24 1/2 in Overall Lg, Std, 0° Head Offset Angle (MPN 4674)
AMPCO
AMPCO Box End Wrench: Natural, 2 15/16 in Head Size, 24 1/2 in Overall Lg, Std, 0° Head Offset Angle (MPN 4674)
AMPCO Box End Wrench: Natural, 3 in Head Size, 24 1/2 in Overall Lg, Std, 0° Head Offset Angle (MPN 4676)
AMPCO
AMPCO Box End Wrench: Natural, 3 in Head Size, 24 1/2 in Overall Lg, Std, 0° Head Offset Angle (MPN 4676)
AMPCO Box End Wrench: Natural, 2 9/16 in Head Size, 21 3/4 in Overall Lg, Std, 0° Head Offset Angle (MPN 4670)
AMPCO
AMPCO Box End Wrench: Natural, 2 9/16 in Head Size, 21 3/4 in Overall Lg, Std, 0° Head Offset Angle (MPN 4670)
AMPCO Box End Wrench: Natural, 2 3/4 in Head Size, 21 3/4 in Overall Lg, Std, 0° Head Offset Angle (MPN 4672)
AMPCO
AMPCO Box End Wrench: Natural, 2 3/4 in Head Size, 21 3/4 in Overall Lg, Std, 0° Head Offset Angle (MPN 4672)
AMPCO Box End Wrench: Natural, 2 1/16 in Head Size, 15 3/4 in Overall Lg, Std, 0° Head Offset Angle (MPN 4654)
AMPCO
AMPCO Box End Wrench: Natural, 2 1/16 in Head Size, 15 3/4 in Overall Lg, Std, 0° Head Offset Angle (MPN 4654)
AMPCO Box End Wrench: Natural, 2 1/8 in Head Size, 18 3/4 in Overall Lg, Std, 0° Head Offset Angle (MPN 4656)
AMPCO
AMPCO Box End Wrench: Natural, 2 1/8 in Head Size, 18 3/4 in Overall Lg, Std, 0° Head Offset Angle (MPN 4656)

More from AMPCO

View all AMPCO parts
AMPCO Box End Wrench: Natural, 1 3/16 in Head Size, 10 1/2 in Overall Lg, Std, 0° Head Offset Angle (MPN 4628)
AMPCO
AMPCO Box End Wrench: Natural, 1 3/16 in Head Size, 10 1/2 in Overall Lg, Std, 0° Head Offset Angle (MPN 4628)
AMPCO Box End Wrench: Natural, 1 7/16 in Head Size, 13 in Overall Lg, Std, 0° Head Offset Angle (MPN 4636)
AMPCO
AMPCO Box End Wrench: Natural, 1 7/16 in Head Size, 13 in Overall Lg, Std, 0° Head Offset Angle (MPN 4636)
AMPCO Box End Wrench: Natural, 1 1/8 in Head Size, 10 1/2 in Overall Lg, Std, 0° Head Offset Angle (MPN 4626)
AMPCO
AMPCO Box End Wrench: Natural, 1 1/8 in Head Size, 10 1/2 in Overall Lg, Std, 0° Head Offset Angle (MPN 4626)
AMPCO Box End Wrench: Natural, 2 5/16 in Head Size, 18 3/4 in Overall Lg, Std, 0° Head Offset Angle (MPN 4662)
AMPCO
AMPCO Box End Wrench: Natural, 2 5/16 in Head Size, 18 3/4 in Overall Lg, Std, 0° Head Offset Angle (MPN 4662)
AMPCO Box End Wrench: Natural, 1 3/8 in Head Size, 13 in Overall Lg, Std, 0° Head Offset Angle (MPN 4634)
AMPCO
AMPCO Box End Wrench: Natural, 1 3/8 in Head Size, 13 in Overall Lg, Std, 0° Head Offset Angle (MPN 4634)
AMPCO Box End Wrench: Natural, 2 1/2 in Head Size, 21 3/4 in Overall Lg, Std, 0° Head Offset Angle (MPN 4668)
AMPCO
AMPCO Box End Wrench: Natural, 2 1/2 in Head Size, 21 3/4 in Overall Lg, Std, 0° Head Offset Angle (MPN 4668)
AMPCO Box End Wrench: Insulated, 1/2 in Head Size, 6 in Overall Lg, Offset, 15° Head Offset Angle (MPN IWSB-1/2)
AMPCO
AMPCO Box End Wrench: Insulated, 1/2 in Head Size, 6 in Overall Lg, Offset, 15° Head Offset Angle (MPN IWSB-1/2)
AMPCO Box End Wrench: Natural, 13/16 in Head Size, 7 1/2 in Overall Lg, Std, 0° Head Offset Angle (MPN 4614)
AMPCO
AMPCO Box End Wrench: Natural, 13/16 in Head Size, 7 1/2 in Overall Lg, Std, 0° Head Offset Angle (MPN 4614)