1/4″ Brass Flare Plug HOLYOKE LP Propane Gas Line Cap Fitting MFG#57-4

SKU: MFG# 57-4

Weight	1.5 lbs
Dimensions	9 × 7 × 1 in

$1.20

In stock — available to order.

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Quantity	Unit price	Saving
1–4	$1.20	0%
5–9	$1.14	5%
10+	$1.08	10%

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1/4" Brass Flare Plug HOLYOKE LP Propane Gas Line Cap Fitting MFG#57-4

Specifications & product details

Overview

HOLYOKE 1/4" Brass Flare Plug – Male Flare Gas Line Cap Fitting for LP & PropaneThis 1/4-inch male flare plug by HOLYOKE (MFG# 57-4) is designed to securely seal the ends of LP, propane, or natural gas lines. Ideal for use in DOT cylinder valves, regulator shutoffs, and service manifolds, it offers a clean and gas-tight solution when capping unused flare fittings.

Key Specifications &

Features

Connection
Type: 1/4" MFL (Male Flare)
Material: Machined Solid Brass for maximum corrosion resistance

Use Case

Seals off open gas line ports during installation, repair, or decommissioningCompatibility: Fits common flare fittings used in LP, propane, and natural gas setups

Applications

DOT cylinder valves, shut-off valve protection, HVAC service lines, RV systemsThis plug is essential for gas technicians needing reliable sealing of service lines and flare port ends. Compact, durable, and compliant with industrial-grade gas system specs.
Brand New – Top Quality HOLYOKE Component. Ships Quickly from U.S. Stock.

Product details

Part / SKU	MFG# 57-4

Package includes

1/4" Brass Flare Plug HOLYOKE LP Propane Gas Line Cap Fitting MFG#57-4

Included components and any stated pack quantity are as described in this listing. Optional accessories shown separately are sold separately unless expressly included above.

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