Skip to content
Free Local Pickup ● Ship to Your Hometown Store
Pro & Contractor Accounts ● Apply for Net Terms
100,000+ Products ● Trusted American Hardware Brands
FAQ Shipping & Returns Order Lookup Contact Account
B&K Proline 1/4 in. MIP Stainless Steel 4 in. L Plug
B&K Proline 1/4 in. MIP Stainless Steel 4 in. L Plug
B&K Proline 1/4 in. MIP Stainless Steel 4 in. L Plug

B&K Proline 1/4 in. MIP Stainless Steel 4 in. L Plug

Meet the B&K Proline 1/4 in. MIP Stainless Steel 4 in. L Plug—a durable, lead-free sealing solution designed for 1/4" MIP ports. Crafted from stainless steel and measuring 4 in…

B&K MPN SF-737 In Stock & Ready to Ship
Local Price Check i Local stores may price this as low as $1.99. Our online price is $1.99.
$1.99
Includes free shipping on orders over $75 · $8.99 standard below
Delivery in as little as 1–4 business days Order within — for same-day shipping
Shop Local · Support Independent

Every order helps keep your local hardware store on the corner.

Why we built NHG
You might find it for less locally. Independent retailers often offer competitive pricing — some products are even cheaper in-store than online.
Real expert advice — not search results. Independent hardware staff know their inventory and the local conditions you're working in.
Keep the neighborhood working. Every dollar spent at an independent retailer returns roughly 3x more to your local economy than at a national chain.

About Product Overview

Meet the B&K Proline 1/4 in. MIP Stainless Steel 4 in. L Plug—a durable, lead-free sealing solution designed for 1/4" MIP ports. Crafted from stainless steel and measuring 4 inches in length, this plug delivers reliable closure in demanding environments.

  • End 1 Diameter / End 1 Type: 1/4 in, MIP (male iron pipe) threaded end
  • Material: Stainless Steel
  • Length: 4 in
  • Maximum Pressure: 290 psi
  • Maximum Temperature: 392 °F
  • Lead Content: Lead-Free
  • Brand / Sub Brand: B&K Proline
  • Product Type: Plug

Why this plug stands out

The stainless steel construction offers excellent durability and corrosion resistance in a variety of environments, while the lead-free design supports safety and regulatory compliance. At 4 inches long, it provides a robust seal for deeper ports and helps ensure leak-free performance in system maintenance and testing scenarios.

Practical applications

Ideal for sealing 1/4" MIP ports in hydraulic, pneumatic, and general piping applications during installation, testing, or service. Its compatibility with standard 1/4" MIP threads makes it a straightforward, reliable choice for maintaining system integrity.

The Details Specifications

Brand B&K
SKU 4012101
UPC 032888215511
Unit 0
Case Pack Quantity 3 per case
Retail Unit Quantity 1
Unit of Measure 0 0
Dimensions (L × W × H) 1 × 3 × 4
Weight 0 lbs
Cubic Feet 0.01059 ft³
Country of Origin CHINA
Safety Data Sheet (SDS) Manufacturer documentation · opens in new tab

Ask our counter. Or theirs.

Most hardware stores can do more than you think. If we can't help you, the folks down the street probably can — just ask at the counter.

What we offer
Free Local Pickup Ship to your hometown store
Pro & Gov Accounts Net terms · tax-exempt
Ships Nationwide From our distribution network
Independent Network Real hardware stores
$0.68 of every dollar spent at a local independent business stays in the community. At a national chain, it's about fifteen cents. Civic Economics, multi-city retail studies
Their Counter
Try local first · we'll wait

The stores we send you to are local and independently run — often for generations, the kind of place where someone behind the counter knows the regulars. We don't own them. We just think they deserve the foot traffic. They can put most of what we sell on their next truck. Ask there before you check out here.

Find a local store →
Mon–Fri 6–5 PST
Independent hardware retailer? Join the network →
About our directory. National Hardware Group is an independent retailer and directory. The local stores we list and link to are separately owned and operated — we have no ownership stake in any of them, and most pay us nothing to be included. That includes plenty of stores flying a co-op banner that people don't realize are locally owned and run, not operated by a corporation. Store owners can choose to upgrade their listing for an enhanced presence or pickup features, but the base directory is free, and inclusion is never a paid endorsement.

Compare products

{"one"=>"Select 2 or 3 items to compare", "other"=>"{{ count }} of 3 items selected"}

Select first item to compare

Select second item to compare

Select third item to compare

Compare